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Healthy volunteer studies in Washington, DC

364 studies at sites in and around Washington accept healthy volunteers — people without the condition being studied. Many studies pay participants for their time and travel; the amount is set by each study, so ask the study team.

Heart Health Study in Washington D.C. to Develop a Community-Based Behavioral Weight Loss Intervention

RecruitingObservational studyHealthy volunteers welcomeMentions payment for participants
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 19 to 85 · All sexes · Updated Oct 2, 2026 · NCT01927783

VRC 900: Evaluation of Tissue-Specific Immune Responses in Adults 18 Years of Age and Older

RecruitingObservational studyHealthy volunteers welcomeMentions payment for participants
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · All sexes · Updated Sep 28, 2026 · NCT01132859

Children s Growth and Behavior Study

RecruitingObservational studyHealthy volunteers welcomeMentions payment for participants
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 8 to 100 · All sexes · Updated Sep 21, 2026 · NCT02390765

Immune Regulation in Ulcerative Colitis or Crohn s Disease

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 75 Years · All sexes · Updated Oct 5, 2026 · NCT00001184

Role of Theta Frequency Oscillations in Proactive and Reactive Control Processes in Youth With Attention Deficit Hyperactivity Disorder (ADHD) and Obsessive Compulsive Disorder (OCD)

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 10 to 17 · All sexes · Updated Oct 5, 2026 · NCT07566468

The Vanguard Study: Testing a New Way to Screen for Cancer

RecruitingHealthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 45 to 75 · All sexes · Updated Oct 5, 2026 · NCT06995898

PET Imaging of Phosphodiesterase-4 (PDE4) in Volunteers With Alzheimer Disease (AD) or Mild Cognitive Impairment (MCI)

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 50 to 100 · All sexes · Updated Oct 5, 2026 · NCT07169630

Data Collection Study of Pediatric and Adolescent Gynecology Conditions

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 100 Years · All sexes · Updated Oct 5, 2026 · NCT04717349

Influence of Brain Oscillation-Dependent TMS on Motor Function

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · All sexes · Updated Oct 5, 2026 · NCT03288220

Survey to Determine Incarcerated Persons' Views on Surrogate Decision Making

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · All sexes · Updated Oct 5, 2026 · NCT07751731

Characterization of an Optically Pumped Magnetometer (OPM) Magnetoencephalography (MEG) Array

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 70 · All sexes · Updated Oct 5, 2026 · NCT04950309

Technical and Translational Development of Cardiovascular Magnetic Resonance (CMR) Imaging

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 7 to 100 · All sexes · Updated Oct 5, 2026 · NCT03581318

BPL-1357 Against H1N1 Influenza Virus Challenge

RecruitingPhase 2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 55 · All sexes · Updated Oct 5, 2026 · NCT07215858

Defining the Brain Phenotype of Children With Williams Syndrome

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 5 to 99 · All sexes · Updated Oct 5, 2026 · NCT01132885

Development of Magnetic Resonance Imaging Techniques for Studying Mood and Anxiety Disorders

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Oct 5, 2026 · NCT00397111

Study of Intravenous ZMA001 in Healthy Subjects

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 60 · All sexes · Updated Oct 5, 2026 · NCT05967299

Clinical, Laboratory, and Epidemiologic Characterization of Individuals and Families at High Risk of Melanoma

RecruitingObservational studyHealthy volunteers welcome
  • National Cancer Institute (NCI), Bethesda · 7 mi away
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
4 Weeks – 99 Years · All sexes · Updated Oct 2, 2026 · NCT00040352

Collection and Distribution of Blood Components From Healthy Donors for In Vitro Research Use

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Oct 2, 2026 · NCT00001846

Development of a Wearable Point of Care Monitoring Device for Pediatric Obstructive Sleep Apnea

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 3 to 12 · All sexes · Updated Oct 2, 2026 · NCT05052216

National Eye Institute Biorepository for Retinal Diseases

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 120 · All sexes · Updated Oct 2, 2026 · NCT01496625

Evaluation of Patients With Mood and Anxiety Disorders and Healthy Volunteers

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 3 to 99 · All sexes · Updated Oct 2, 2026 · NCT00024635

A Longitudinal Investigation of the Endocrine and Neurobiologic Events Accompanying Puberty

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 7 to 35 · All sexes · Updated Oct 2, 2026 · NCT01434368

Clinical and Genetic Studies of Li-Fraumeni Syndrome

RecruitingObservational studyHealthy volunteers welcome
  • National Cancer Institute - Shady Grove, Bethesda · 7 mi away
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
All ages · All sexes · Updated Oct 2, 2026 · NCT01443468

Safety and Immunogenicity of Recombinant Varicella Zoster Virus Vaccine in People With HIV Who Have a CD4 Count Less Than 300 or Greater Than or Equal to 300 and a Healthy Control Population

RecruitingPhase 1/2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Oct 2, 2026 · NCT05580458

Sample Collection From Healthy Volunteers for Assay Optimization

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 3 to 80 · All sexes · Updated Oct 2, 2026 · NCT03538600

Study of Mycobacterial Infections

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Up to age 100 · All sexes · Updated Oct 2, 2026 · NCT00018044

Brain Stimulation and Vision Testing

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 50 · All sexes · Updated Oct 2, 2026 · NCT01617408

Clinical and Genetic Evaluation of Individuals With Undiagnosed Disorders Through the Undiagnosed Diseases Network

RecruitingObservational studyHealthy volunteers welcome
  • Childrens National Medical Center, Washington D.C.
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Month – 100 Years · All sexes · Updated Oct 2, 2026 · NCT02450851

Etiology, Pathogenesis, and Natural History of Idiopathic CD4+ Lymphocytopenia

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Oct 2, 2026 · NCT00867269

Natural History and Genetics of Food Allergy and Related Conditions

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 99 Years · All sexes · Updated Oct 2, 2026 · NCT02504853

Normal Values in Hearing and Balance Testing

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 5 to 80 · All sexes · Updated Oct 2, 2026 · NCT01629108

Natural History of Bronchiectasis

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 5 to 100 · All sexes · Updated Oct 2, 2026 · NCT00943514

Sociocultural & Biobehavioral Influences on Pain Expression and Assessment

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 60 · All sexes · Updated Oct 2, 2026 · NCT03258580

Clinical and Molecular Characteristics of Primary Aldosteronism in Blacks

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 7 to 70 · All sexes · Updated Oct 2, 2026 · NCT03374215

Noninvasive Pre-surgical Evaluation of Patients With Focal Epilepsy and Establishment of a Normative Imaging Database

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 8 to 120 · All sexes · Updated Oct 2, 2026 · NCT02107989

Comprehensive Omics Analysis of Pediatric and Adult Solid Tumors and Establishment of a Repository for Related Biological Studies

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
4 Weeks · All sexes · Updated Oct 2, 2026 · NCT01109394

Development and Validation of Patient Reported Outcome (PRO) Measures for Individuals With Neurofibromatosis 1 (NF1) and Plexiform Neurofibromas (pNFs)

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 5 and older · All sexes · Updated Oct 2, 2026 · NCT02544022

State-dependent Interoception, Value-based Decision-making, and Introspection

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 55 · All sexes · Updated Oct 2, 2026 · NCT05666726

Human Movement Database

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Month – 99 Years · All sexes · Updated Oct 2, 2026 · NCT00001252

DICER1-related Pleuropulmonary Blastoma Cancer Predisposition Syndrome: A Natural History Study

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Month – 99 Years · All sexes · Updated Oct 2, 2026 · NCT01247597

The NIH MINI Study: Metabolism, Infection, and Immunity in Inborn Errors of Metabolism

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
4 Weeks – 115 Years · All sexes · Updated Oct 2, 2026 · NCT01780168

MRS Measurement of Glutamate and GABA Metabolism in Brain

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Oct 2, 2026 · NCT00109174

Studies of Blood Flow to the Brain During Thought

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Oct 2, 2026 · NCT00001360

Improving White Blood Cell Collection From Healthy Donors

RecruitingPhase 4Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 75 · All sexes · Updated Oct 2, 2026 · NCT01553214

Evaluation of Biochemical Markers and Clinical Investigation of Niemann-Pick Disease, Type C

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 120 Years · All sexes · Updated Oct 2, 2026 · NCT00344331

New Heart Imaging Techniques to Evaluate Possible Heart Disease

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Oct 2, 2026 · NCT01399385

MRI Study of Musculoskeletal Function

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 5 to 95 · All sexes · Updated Oct 2, 2026 · NCT00051857

Natural History of Treated Neurocysticercosis and Long-Term Outcomes

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 3 to 99 · All sexes · Updated Oct 2, 2026 · NCT00001205

Tailoring Mobile Health Technology to Reduce Obesity and Improve Cardiovascular Health in Resource-Limited Neighborhood Environments

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 21 to 75 · Women · Updated Oct 2, 2026 · NCT03288207

Comprehensive Multimodal Analysis of Neuroimmunological Diseases of the Central Nervous System

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Month – 99 Years · All sexes · Updated Oct 2, 2026 · NCT00794352

Improved Methods of Cell Selection for Bone Marrow Transplant Alternatives

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 60 · All sexes · Updated Oct 2, 2026 · NCT00001529

Assessing and Improving Quantitative Magnetic Resonance Imaging Metrics in Human Subjects

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Oct 2, 2026 · NCT05604534

Screening for Research Participants

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 100 · All sexes · Updated Oct 2, 2026 · NCT00655096

Collection of Human Biospecimens for Basic and Clinical Research Into Globin Variants

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 70 · All sexes · Updated Oct 2, 2026 · NCT03937817

Imatinib to Increase RUNX1 Activity in Participants With Germline RUNX1 Deficiency

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · All sexes · Updated Oct 2, 2026 · NCT06090669

NIAID Centralized Sequencing Protocol

RecruitingObservational studyHealthy volunteers welcome
  • Children's National Health System, Washington D.C.
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 100 Years · All sexes · Updated Oct 2, 2026 · NCT03206099

NIMH Rhythms and Blues Study: A Prospective Natural History Study of Motor Activity, Mood States, and Bipolar Disorder

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 8 to 70 · All sexes · Updated Oct 2, 2026 · NCT05669703

Ultra-Low Field (ULF) Point-of-Care (POC) MRI System for Brain Morphology and Pathology

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 3 to 99 · All sexes · Updated Oct 2, 2026 · NCT06203626

Natural History, Pathogenesis and Outcome of Melorheostosis A Rare Osteosclerotic Disease

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 90 · All sexes · Updated Oct 2, 2026 · NCT02504879

Natural History Study of Biomarkers in Pulmonary Arterial Hypertension

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Oct 2, 2026 · NCT01730092

Long-Term Follow up of Patients Undergoing Hematopoietic Stem Cell Transplantation, Cellular Therapy, or Gene Therapy

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 4 to 120 · All sexes · Updated Oct 2, 2026 · NCT03000244

Characterization of Patients With Uncommon Presentations and/or Uncommon Diseases Associated With the Cardiovascular System

RecruitingObservational studyHealthy volunteers welcome
  • Hope Center, Washington D.C.
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 1 to 100 · All sexes · Updated Oct 2, 2026 · NCT01143454

Neural and Psychological Mechanisms of Pain Perception

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 50 · All sexes · Updated Oct 2, 2026 · NCT02446262

Clinical, Genetic, and Epidemiologic Study of Children and Adults With RASopathies

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Month – 99 Years · All sexes · Updated Oct 2, 2026 · NCT04888936

Study Brain Mechanisms of Frustration With Magnetoencephalography in Healthy Volunteers

RecruitingEarly phase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 55 · All sexes · Updated Oct 2, 2026 · NCT06484088

Collection and Analysis of Blood, Bone Marrow, and Buccal Mucosa Samples From Healthy Volunteers

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 8 to 99 · All sexes · Updated Oct 2, 2026 · NCT00442195

Individual Variations of Taste and Smell Perception in Alcohol Use Disorder (AUD)

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Oct 2, 2026 · NCT05677321

Development Of Neuroimaging Methods To Assess The Neurobiology Of Addiction

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Oct 2, 2026 · NCT02535702

Effects of Sucralose on Drug Absorption and Metabolism (The SweetMeds Study)

RecruitingPhase 2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 60 · Women · Updated Oct 2, 2026 · NCT03407079

Oral Bacteria and Immune System Problems Involved in Gum Disease (Periodontitis)

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 7 to 100 · All sexes · Updated Oct 2, 2026 · NCT01568697

Hereditary Leiomyomatosis Renal Cell Cancer - Study of the Genetic Cause and the Predisposition to Renal Cancer

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 and older · All sexes · Updated Oct 2, 2026 · NCT00050752

Collecting Blood Samples From Patients With and Without Cancer to Evaluate Tests for Early Cancer Detection

RecruitingObservational studyHealthy volunteers welcome
  • MedStar Georgetown University Hospital, Washington D.C.
  • MedStar Washington Hospital Center, Washington D.C.
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 40 to 75 · All sexes · Updated Oct 2, 2026 · NCT05334069

Natural History and Development of Spondyloarthritis

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 99 · All sexes · Updated Oct 2, 2026 · NCT01422694

Characterization of Nociception Phenotype in Individuals With Intellectual Disability

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 8 to 30 · All sexes · Updated Oct 2, 2026 · NCT05473429

Buprenorphine Implementation at Syringe Service Programs to Reduce Overdoses

RecruitingHealthy volunteers welcome
  • HIPS, Washington D.C.
Ages 18 and older · All sexes · Updated Oct 1, 2026 · NCT07631598

Observational Study of Decentralized Urine Optical Interaction Patterns Associated With Environmental Microplastic and Nanoplastic Exposure

RecruitingObservational studyHealthy volunteers welcome
  • Decentralized / At-Home Participation (U.S.), Washington D.C.
Ages 18 and older · All sexes · Updated Oct 1, 2026 · NCT07775495

Natural History of Craniofacial Anomalies and Developmental Growth Variants

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 100 · All sexes · Updated Oct 1, 2026 · NCT02639312

Admission and Management of Occupational or Other Exposures to Biodefense/Bioterrorism Agents or to Epidemic/Emerging Infectious Diseases

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 3 to 99 · All sexes · Updated Oct 1, 2026 · NCT01200953

Suvorexant for Alcohol Use Disorder (AUD): Neural Mechanisms

RecruitingPhase 1/2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 75 · All sexes · Updated Oct 1, 2026 · NCT06484075

Evaluation of [11C]ZTP-1 to Image PDE4B

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 101 · All sexes · Updated Oct 1, 2026 · NCT07625345

Long-term Observation of Participants With Mood Disorders

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 99 · All sexes · Updated Oct 1, 2026 · NCT04877977

[18F]PF-06445974 to Image PDE4B in Major Depressive Disorder Using PET

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 70 · All sexes · Updated Oct 1, 2026 · NCT05703685

Studies of the Natural History, Pathogenesis, and Outcome of Idiopathic Systemic Vasculitis

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 3 and older · All sexes · Updated Oct 1, 2026 · NCT02257866

Evaluation of Patients With Liver Disease

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 100 · All sexes · Updated Oct 1, 2026 · NCT00001971

Characterization of Diseases With Salivary Gland Involvement

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 4 to 100 · All sexes · Updated Oct 1, 2026 · NCT02327884

A Natural History Study of Metabolic Sizing in Health and Disease

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 99 · All sexes · Updated Oct 1, 2026 · NCT05398783

Oral Specimen and Data Acquisition Study of Subjects Requiring Third Molar Removal

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 16 to 50 · All sexes · Updated Sep 30, 2026 · NCT01805869

Collection of Serum and Tissue Samples From Patients With Biopsy-Proved or Suspected Malignant Disease

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 and older · All sexes · Updated Sep 30, 2026 · NCT00026884

Cancer in Inherited Bone Marrow Failure Syndromes

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 100 Years · All sexes · Updated Sep 30, 2026 · NCT00027274

Clinical Manifestations and Biomarkers in Amyotrophic Lateral Sclerosis Type 4 and Other Inherited Neurological Disorders of RNA Processing

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 5 to 120 · All sexes · Updated Sep 30, 2026 · NCT04394871

Blood Sampling for Research Related to Sickle Cell Disease

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Sep 29, 2026 · NCT00542230

PET Imaging of Noradrenergic Transmission in the Brain

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 105 · All sexes · Updated Sep 29, 2026 · NCT07686393

Early Metabolic Effects of Antiretroviral Drugs in Healthy volUnteers: a Phase 2 Randomized Study

RecruitingPhase 2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 55 · All sexes · Updated Sep 29, 2026 · NCT05652478

The Neurodevelopmental and Behavioral Phenotyping Screening Protocol

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
6 Weeks · All sexes · Updated Sep 29, 2026 · NCT00271622

Pilot Trial of Allogeneic Blood or Marrow Transplantation for Primary Immunodeficiencies

RecruitingPhase 2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 4 to 75 · All sexes · Updated Sep 28, 2026 · NCT02579967

Apheresis and Specimen Collection Procedures to Obtain Plasma, Peripheral Blood Mononuclear Cells (PBMCs) and Other Specimens for Research Studies

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 3 and older · All sexes · Updated Sep 28, 2026 · NCT00067054

Technical Development of Cardiovascular Magnetic Resonance Imaging (CMR) Using a Low Specific Absorption Rate (SAR) Scanner System

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Sep 28, 2026 · NCT03331380

Prospective Evaluation of High Resolution Dual Energy Computed Tomographic Imaging, Noninvasive (Liquid) Biopsies, and Minimally Invasive Surgical Surveillance for Early Detection of Mesotheliomas in Patients With BAP1 Tumor Predisposition Syndrome

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 30 to 120 · All sexes · Updated Sep 28, 2026 · NCT04431024

Development of Magnetic Resonance Spectroscopic Imaging Techniques for Imaging Metabolites in Human Brain and Muscle

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Sep 28, 2026 · NCT01266577

Samples From Human Subjects to Facilitate Basic, Translational and Clinical Research

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Sep 28, 2026 · NCT03253705

Evaluation of Adults With Endocrine and Metabolic-Related Conditions

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Sep 28, 2026 · NCT02830308

Viral Load in Blood and Lymph Tissues in People Living With HIV

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Sep 28, 2026 · NCT00001316

Genetic Analysis of Birt Hogg-Dube Syndrome and Characterization of Predisposition to Kidney Cancer

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 and older · All sexes · Updated Sep 28, 2026 · NCT00033137

Natural History, Physiology, Microbiome and Biochemistry Studies of Propionic Acidemia

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Month – 100 Years · All sexes · Updated Sep 28, 2026 · NCT02890342

Characterization and Treatment of Adolescent Depression

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 11 to 25 · All sexes · Updated Sep 28, 2026 · NCT03388606

Screening Volunteers for Clinical Trials

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 60 · All sexes · Updated Sep 28, 2026 · NCT01375530

Natural History, Management, and Genetics of the Hyperimmunoglobulin E Recurrent Infection Syndrome (HIES)

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Month – 120 Years · All sexes · Updated Sep 28, 2026 · NCT00006150

Physical and Behavioral Traits of Overweight and Obese Adults

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Sep 28, 2026 · NCT00428987

A Prospective Natural History Study of Lymphatic Anomalies

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 100 Years · All sexes · Updated Sep 28, 2026 · NCT05731141

Environmental Risk Factors for the Anti-synthetase Syndrome

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 100 · All sexes · Updated Sep 28, 2026 · NCT01276470

Effects of Treatments on Atopic Dermatitis

RecruitingPhase 2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 50 · All sexes · Updated Sep 28, 2026 · NCT01631617

The Mechanistic Biology of Primary Immunodeficiency Disorders

RecruitingObservational studyHealthy volunteers welcome
  • Children's National Health System (CNHS), Washington D.C.
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 90 Years · All sexes · Updated Sep 28, 2026 · NCT03394053

Older Breast Cancer Patients: Risk for Cognitive Decline

RecruitingObservational studyHealthy volunteers welcome
  • Georgetown University, Washington D.C.
Ages 60 to 105 · Women · Updated Sep 28, 2026 · NCT03451383

A Randomized Comparison of Stage-Based Care Versus Risk Factor-Based Care for Prevention of Cardiovascular Events

RecruitingHealthy volunteers welcome
  • Flourish Bowie dba Flourish Research, Bowie · 17 mi away
Ages 55 and older · All sexes · Updated Sep 28, 2026 · NCT06112418

Collection of Data and Samples From Healthy Donors for Use in Translational Research

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 85 · All sexes · Updated Sep 28, 2026 · NCT00090662

Collection of Blood From Patients With Cancer

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Sep 28, 2026 · NCT00034216

Hematopoietic Stem Cell Mobilization in Idiopathic CD4 Lymphocytopenia Patients and Healthy Controls for the Study of T Cell Maturation and Trafficking in Murine Models

RecruitingPhase 2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Sep 28, 2026 · NCT02015013

Fungal Infection Susceptibility

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 99 · All sexes · Updated Sep 28, 2026 · NCT00001352

Electrical Impedance Myography: Natural History Studies inNeuromuscular Disorders and Healthy Volunteers

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 110 · All sexes · Updated Sep 28, 2026 · NCT01900132

Diabetes and Heart Disease Risk in Blacks

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 70 · All sexes · Updated Sep 28, 2026 · NCT00001853

Perception, Sensation, Cognition and Action in Humans

RecruitingObservational studyHealthy volunteers welcome
  • National Eye Institute (NEI), Bethesda · 7 mi away
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 13 to 65 · All sexes · Updated Sep 28, 2026 · NCT03407066

Phase 1 Challenge Study Using rDEN2delta30-7169 to Evaluate Host-Pathogen Interactions in Primary, Homotypic, and Heterotypic Dengue Virus Infection

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 50 · All sexes · Updated Sep 25, 2026 · NCT07706686

Induced Blood-Stage Malaria in Healthy Malaria-Naive Adults to Assess the Safety and Infectivity of Plasmodium Vivax Challenge Agent and Evaluate Transmission in Mosquito Feeding Assays

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 54 · All sexes · Updated Sep 25, 2026 · NCT06607003

Role of Metal Ion Transporter ZIP8 in Alcohol-Related Behaviors

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 21 to 60 · All sexes · Updated Sep 25, 2026 · NCT06819189

Natural History, Genetics, and Pathophysiology of Systemic Juvenile Idiopathic Arthritis, Adult-Onset Still's Disease, and Related Conditions

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 100 Years · All sexes · Updated Sep 25, 2026 · NCT03510442

Nicotinic Receptor Genetic Variation and Alcohol Reward

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 21 to 60 · All sexes · Updated Sep 25, 2026 · NCT03294460

Adult and Juvenile Myositis

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 100 · All sexes · Updated Sep 24, 2026 · NCT00017914

Thinking and Memory Problems in People With HIV

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 110 · All sexes · Updated Sep 24, 2026 · NCT01875588

Phase 1/2 Study of Respiratory Syncytial Virus and Human Metapneumovirus (RSV+HMPV) Vaccine Candidate in Adults 60 Years of Age and Older

RecruitingPhase 1/2Healthy volunteers welcome
  • Velocity Clinical Research - Washington DC- Site Number : 8400021, Washington D.C.
Ages 60 and older · All sexes · Updated Sep 24, 2026 · NCT07734649

Natural History of Inflammatory Muscle Diseases

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 120 · All sexes · Updated Sep 24, 2026 · NCT05738824

A Clinical Trial to Evaluate the Safety and Immunogenicity of rVSV∆G-MARV-GP Vaccine in Adults in Good General Health

RecruitingPhase 1Healthy volunteers welcome
  • George Washington University, Washington D.C.
Ages 18 to 50 · All sexes · Updated Sep 23, 2026 · NCT07425821

Imaging Techniques in MRI

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Sep 23, 2026 · NCT01130545

Genetics of Inherited Eye Disease

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 1 to 120 · All sexes · Updated Sep 22, 2026 · NCT02471287

Metabolic Profiling of Immune Responses in Immune-mediated Diseases

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 75 · All sexes · Updated Sep 22, 2026 · NCT04864886

Natural History Study of GATA2 Deficiency and Related Disorders

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 100 · All sexes · Updated Sep 22, 2026 · NCT01905826

Studies of the Pathogenesis of HIV Infection in Human Peripheral Blood Cells and/or Body Fluids in People Living With and Without HIV

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · All sexes · Updated Sep 22, 2026 · NCT00001281

Urinary Vitamin C Loss in Diabetic Subjects

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Sep 22, 2026 · NCT00071526

The Beneficial Effects of Naps on Motor Learning

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 80 · All sexes · Updated Sep 22, 2026 · NCT04312126

Human Immune Response to Ixodes Scapularis Tick Bites

RecruitingPhase 1/2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 99 · All sexes · Updated Sep 22, 2026 · NCT05036707

Collection of Human Samples to Study Hairy Cell and Other Leukemias, and to Develop Recombinant Immunotoxins for Cancer Treatment

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Sep 22, 2026 · NCT01087333

Diagnosis and Treatment of Patients With Inborn Errors of Metabolism

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Month – 115 Years · All sexes · Updated Sep 22, 2026 · NCT00369421

Studies of Dermatologic Diseases Biospecimen Acquisition Protocol

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 100 Years · All sexes · Updated Sep 22, 2026 · NCT02471352

Cell Collection to Study Eye Diseases

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 120 Years · All sexes · Updated Sep 22, 2026 · NCT01432847

Familial Mediterranean Fever and Related Disorders: Genetics and Disease Characteristics

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
2 Months – 115 Years · All sexes · Updated Sep 22, 2026 · NCT00001373

Trial of Allogeneic Reduced-Intensity, HLA-Haploidentical Allogeneic Hematopoietic Cell Bone Marrow Transplantation Followed by Graft-versus-Host-Disease (GVHD) Prophylaxis With Cyclophosphamide, Bortezomib and Maraviroc for Hematologic Malignancies ...

RecruitingPhase 1/2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 12 to 120 · All sexes · Updated Sep 22, 2026 · NCT05470491

Evaluation of Patients With HAM/TSP

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · All sexes · Updated Sep 22, 2026 · NCT00001778

Evaluation of Patients With Immune Function Abnormalities

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
All ages · All sexes · Updated Sep 22, 2026 · NCT00128973

A Comprehensive Clinical, Microbiological and Immunological Assessment of Patients With Suspected Post Treatment Lyme Disease Syndrome and Selected Control Populations

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 13 to 99 · All sexes · Updated Sep 22, 2026 · NCT00001539

Unraveling the Mechanisms Underlying Primary Sclerosing Cholangitis Through a Multidisciplinary, Integrative Research Approach

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 90 · All sexes · Updated Sep 22, 2026 · NCT04685200

Electrophysiologic Sleep Phenotyping and Sleep-Dependent Neuro-maturation in Clinical and Healthy Pediatric Populations

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
6 Months – 8 Years · All sexes · Updated Sep 22, 2026 · NCT04639830

Molecular, Cellular, and Genetic Characterization of Human Adipose Tissue and Its Role in Metabolism

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 90 · All sexes · Updated Sep 22, 2026 · NCT02692885

Natural History, Pathogenesis, and Outcome of Autoinflammatory Diseases (NOMID/CAPS, DIRA, CANDLE, SAVI, NLRC4-MAS, Still'S-like Diseases, and Other Undifferentiated Autoinflammatory Diseases)

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Up to age 99 · All sexes · Updated Sep 22, 2026 · NCT02974595

Neuropharmacologic Imaging and Biomarker Assessments of Response to Acute and Repeated-Dosed Ketamine Infusions in Major Depressive Disorder

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Sep 22, 2026 · NCT03065335

Study of New Magnetic Resonance Imaging Methods of the Brain

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · All sexes · Updated Sep 22, 2026 · NCT00004577

An Investigation of Pituitary Tumors and Related Hypothalmic Disorders

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 70 · All sexes · Updated Sep 22, 2026 · NCT00001595

Screening for LID Clinical Studies Unit Healthy Volunteer Protocols

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Sep 22, 2026 · NCT01386424

Human Biospecimen Procurement Protocol: Biorepository to Support Translational Research to Identify Disease Mechanism(s)

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Month – 100 Years · All sexes · Updated Sep 22, 2026 · NCT02543996

Recruitment and Apheresis Collection of Peripheral Blood Hematopoietic Stem Cells, Mononuclear Cells and Granulocytes

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 70 · All sexes · Updated Sep 22, 2026 · NCT00001405

Study of Neuro-Cognitive Correlates of Pediatric Anxiety Disorders

RecruitingPhase 2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
  • University of Maryland, College Park, College Park · 8 mi away
Ages 8 to 65 · All sexes · Updated Sep 22, 2026 · NCT00018057

A Clinical Study to Investigate the Safety and Immunogenicity of rVSV∆G-SUDV-GP, a Sudan Virus (SUDV) Vaccine for the Prevention of SUDV Disease in Adults in Good General Health

RecruitingPhase 1Healthy volunteers welcome
  • George Washington University, Washington D.C.
Ages 18 to 50 · All sexes · Updated Sep 21, 2026 · NCT07565090

Adapting a Sexual Assault Prevention Intervention for Transgender Undergraduates: A One-Arm Pilot Trial

RecruitingHealthy volunteers welcome
  • University of Maryland College Park, College Park · 8 mi away
Ages 18 to 25 · All sexes · Updated Sep 21, 2026 · NCT07706322

Hormone Replacement Therapy in Adolescents With Premature Ovarian Insufficiency

RecruitingPhase 3Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 11 to 19 · Women · Updated Sep 18, 2026 · NCT06851754

NIH Investigative Deep Phenotyping Study of Gulf War Veteran Health (Project NIH IN-DEPTH)

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 48 to 70 · All sexes · Updated Sep 18, 2026 · NCT05375812

Collection of Lung Fluid and Tissue Samples for Research

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 5 to 100 · All sexes · Updated Sep 18, 2026 · NCT00471250

Identifying Patterns in the Breath of Individuals With Breast Cancer

RecruitingObservational studyHealthy volunteers welcome
  • GW Comprehensive Breast Center, Washington D.C.
Ages 40 to 74 · Women · Updated Sep 18, 2026 · NCT06512350

PET Imaging of Cyclooxygenases in Neurodegenerative Brain Disease

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 99 · All sexes · Updated Sep 18, 2026 · NCT04396873

Vascular Disease Discovery Protocol

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 100 · All sexes · Updated Sep 18, 2026 · NCT03538639

Natural History Protocol for Movement Disorders

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 100 · All sexes · Updated Sep 18, 2026 · NCT05413291

Donor Lymphocyte Infusion After Allogeneic Hematopoietic Cell Transplantation for High-Risk Hematologic Malignancies

RecruitingPhase 1/2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 12 to 120 · All sexes · Updated Sep 18, 2026 · NCT05327023

Assessment of [18F]-Fluorocellobiose ([18F]FCB) Pharmacokinetics in Healthy Volunteers and Subjects With Invasive Mold Infections

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Sep 18, 2026 · NCT07704333

Investigational Use of Neuromuscular Ultrasound

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 110 · All sexes · Updated Sep 17, 2026 · NCT05237973

Youth-Onset Type 2 Diabetes and Heart Disease: The Young at Heart Prospective Cohort Study

RecruitingObservational studyHealthy volunteers welcome
  • Children's National Hospital (CNH), Washington D.C.
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 12 to 25 · All sexes · Updated Sep 17, 2026 · NCT06730113

A Longitudinal Study of Familial Hypereosinophilia (FE): Natural History and Markers of Disease Progression

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 1 to 100 · All sexes · Updated Sep 16, 2026 · NCT00091871

Long-Term Follow-Up of Survivors of Pediatric Cushing Disease

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 90 · All sexes · Updated Sep 16, 2026 · NCT03831958

Clinical and Scientific Assessment of Pain and Painful Disorders

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 12 to 120 · All sexes · Updated Sep 16, 2026 · NCT02707029

Cross-Sectional Evaluation of Persistence of SARS-CoV-2 Remnants After Recovery From Acute Infection

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 110 · All sexes · Updated Sep 16, 2026 · NCT06577467

Studies of Skin Microbes in Healthy People and in People With Skin Conditions

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 100 · All sexes · Updated Sep 16, 2026 · NCT00605878

Apheresis to Obtain Plasma or White Blood Cells for Laboratory Studies

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Sep 16, 2026 · NCT00114647

Magnetic Resonance Imaging (MRI) to Evaluate Activity of Multiple Sclerosis (MS)

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · All sexes · Updated Sep 16, 2026 · NCT00001248

Study of Systemic Lupus Erythematosus

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 3 to 120 · All sexes · Updated Sep 16, 2026 · NCT00001372

Characterization Imaging Instruments in Alcoholics and Non-Alcoholics

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Sep 16, 2026 · NCT02108080

Natural History Study of CADASIL

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Sep 15, 2026 · NCT05072483

Caregiving Networks Across Disease Context and the Life Course

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Sep 15, 2026 · NCT05007990

Technical Development of Cardiovascular Magnetic Resonance Imaging

RecruitingObservational studyHealthy volunteers welcome
  • Medstar Washington Hospital Center, Washington D.C.
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Sep 15, 2026 · NCT04927429

Evaluating the Dose, Safety, Tolerability, and Immunogenicity of Mosaic Hexavalent Influenza Vaccine VRCFLUMOS0116-00-VP (FluMos-v2) With and Without ALFQ Adjuvant in Healthy Adults

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 50 · All sexes · Updated Sep 15, 2026 · NCT06863142

ARPA-H Smart Band-Aid to Measure Chronic Pain in Women

RecruitingObservational studyHealthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 and older · Women · Updated Sep 14, 2026 · NCT06994988

Viral Infections in Healthy and Immunocompromised Hosts

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
6 Months – 120 Years · All sexes · Updated Sep 14, 2026 · NCT01306084

Longitudinal Studies of Patient With FPDMM

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 100 Years · All sexes · Updated Sep 11, 2026 · NCT03854318

A Study of Aleniglipron in Adults With Obesity or Overweight and Type 2 Diabetes Mellitus (ACCOMPLISH-2)

RecruitingPhase 3Healthy volunteers welcome
  • ACCOMPLISH-2 Research Site, Silver Spring · 7 mi away
Ages 18 to 79 · All sexes · Updated Sep 11, 2026 · NCT07654374

A Repository to Study Host-Microbiome Interactions in Health and Disease

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
All ages · All sexes · Updated Sep 11, 2026 · NCT05656378

The Lowest Effective Dose of Post-Transplantation Cyclophosphamide in Combination With Sirolimus and Mycophenolate Mofetil as Graft-Versus-Host Disease Prophylaxis After Reduced Intensity Conditioning and Peripheral Blood Stem Cell Transplantation

RecruitingPhase 1/2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 12 to 120 · All sexes · Updated Sep 11, 2026 · NCT05436418

A Study Assessing Safety, Tolerability, and Efficacy of INNA-051 in Preventing Respiratory Illness Due to Viral Infections in Healthy Adults 18 to 45 Years of Age

RecruitingPhase 2Healthy volunteers welcome
  • Naval Medical Research Command (NMRC), Bethesda · 7 mi away
Ages 18 to 45 · All sexes · Updated Sep 11, 2026 · NCT07222670

Thrombosis and Inflammation in Vessels Initiative (TIVI)

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 5 to 100 · All sexes · Updated Sep 10, 2026 · NCT06552767

Role of Genetic Factors in the Development of Lung Disease

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 90 · All sexes · Updated Sep 10, 2026 · NCT00001532

Clinical and Laboratory Study of Methylmalonic Acidemia

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Month – 115 Years · All sexes · Updated Sep 10, 2026 · NCT00078078

Acute Infection in Mitochondrial Disease: Metabolism, Infection and Immunity

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
2 Months – 115 Years · All sexes · Updated Sep 10, 2026 · NCT04419870

The Efficacy of Vitamin D Supplementation to Sustain Performance Outcomes

RecruitingHealthy volunteers welcome
  • Sleep Research Center (SRC), Walter Reed Army Institute of Research (WRAIR), Silver Spring · 7 mi away
Ages 18 to 40 · All sexes · Updated Sep 10, 2026 · NCT07654777

Quadrivalent Influenza HA Stem Vaccine VRC-FLUMOS0122-00-VP (SteMos1) With and Without ALFQ Adjuvant in Healthy Adults

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 50 · All sexes · Updated Sep 9, 2026 · NCT07111078

How a Single Workout Affects Gut Bugs in Women With Different Fitness Levels and Body Types

RecruitingHealthy volunteers welcome
  • Milken Institute School of Public Health, The George Washington University, Washington D.C.
Ages 21 to 40 · Women · Updated Sep 9, 2026 · NCT06691100

Neurobiology of Suicide

RecruitingPhase 2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 70 · All sexes · Updated Sep 9, 2026 · NCT02543983

Observational Digital Biomarker Discovery in Respiratory Virus Challenge Studies

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Sep 9, 2026 · NCT04772170

A Study to Learn About a Clostridioides Difficile Vaccine in People 65 Years of Age and Older

RecruitingPhase 3Healthy volunteers welcome
  • GW Vaccine Research Unit, Washington D.C.
  • The GW Medical Faculty Associates, Washington D.C.
Ages 65 and older · All sexes · Updated Sep 9, 2026 · NCT07282665

Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of Fx-5A in Healthy Volunteers

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 99 · All sexes · Updated Sep 8, 2026 · NCT04216342

Mirror Neuron Network Dysfunction as an Early Biomarker of Neurodevelopmental Disorder

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
9 Months – 65 Years · All sexes · Updated Sep 8, 2026 · NCT03307317

Epstein-Barr Virus (EBV) gH/gL/gp42-Ferritin Nanoparticle Vaccine With or Without gp350-Ferritin in Healthy Adults With or Without EBV Infection

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 29 · All sexes · Updated Sep 8, 2026 · NCT06908096

Controls and Healthy Vasculature Initiative

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 90 · All sexes · Updated Sep 4, 2026 · NCT05403151

Rare Tumors and Cancer Predisposition in Individuals and Families

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
All ages · All sexes · Updated Sep 2, 2026 · NCT05350761

Natural History and Biospecimen Acquisition for Children and Adults With Rare Solid Tumors

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
4 Weeks · All sexes · Updated Sep 2, 2026 · NCT03739827

Long-term Evaluation and Follow-up Care of Patients Treated With Stem Cell Transplants

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 7 to 80 · All sexes · Updated Sep 1, 2026 · NCT00106925

Rod and Cone Mediated Function in Retinal Disease

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 5 to 100 · All sexes · Updated Aug 31, 2026 · NCT02617966

Natural History Study of Progressive Multifocal Leukoencephalopathy (PML)

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 120 · All sexes · Updated Aug 31, 2026 · NCT01730131

Desmopressin Stimulation Test Performance in ACTH-Dependent Cushing Syndrome

RecruitingPhase 2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 70 · All sexes · Updated Aug 31, 2026 · NCT06635629

NIAAA Natural History Protocol

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Aug 31, 2026 · NCT02231840

Cognitive Aftereffects of Neurotoxicity in Children and Young Adults With Relapsed/Refractory Hematologic Malignancies Who Receive CAR T-cell Therapy

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 5 and older · All sexes · Updated Aug 31, 2026 · NCT05237986

The Impact of Heavy Alcohol Use on Saliva and Oral Health

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Aug 28, 2026 · NCT06684483

Functional Magnetic Resonance Imaging Sleep Study With Auditory Stimuli

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 34 · All sexes · Updated Aug 28, 2026 · NCT02629107

Geospatial Analysis of Neighborhood Environmental Stress in Relation to Biological Markers of Cardiovascular Health and Health Behaviors in Women

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 19 to 45 · Women · Updated Aug 28, 2026 · NCT04014348

Screening of Healthy Volunteers for Investigational Antimalarial Drugs, Malaria Vaccines, and Controlled Human Malaria Challenge

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 50 · All sexes · Updated Aug 28, 2026 · NCT02639299

Care of the Urothelial Cancer Patient and Prospective Procurement of Urothelial Cancer Tissue

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · All sexes · Updated Aug 28, 2026 · NCT02379429

ASSESS ALL ALS Study

RecruitingObservational studyHealthy volunteers welcome
  • Georgetown University, Washington D.C.
Ages 18 and older · All sexes · Updated Aug 24, 2026 · NCT06578195

Von Hippel-Lindau (VHL): Clinical Manifestations, Diagnosis, Management and Molecular Bases of Inherited Renal and Other Urologic Malignant Disorders

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 and older · All sexes · Updated Aug 24, 2026 · NCT00001238

Studying Childhood-onset Behavioral, Psychiatric, and Developmental Disorders

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
30 Days – 99 Years · All sexes · Updated Aug 24, 2026 · NCT01778504

Angioedema Biomarker Research Study

RecruitingObservational studyHealthy volunteers welcome
  • Institute for Asthma and Allergy Clinical Research, Wheaton · 10 mi away
Ages 12 to 75 · All sexes · Updated Aug 24, 2026 · NCT06210698

PREVENT ALL ALS Study

RecruitingObservational studyHealthy volunteers welcome
  • Georgetown University, Washington D.C.
  • Nih/Ninds, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Aug 24, 2026 · NCT06581861

Genetic Studies of Insulin and Diabetes

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
6 Months – 120 Years · All sexes · Updated Aug 24, 2026 · NCT00001987

Acceptance and Commitment Therapy for Caregivers of Children With a RASopathy: An Internal Pilot Feasibility Study and Follow-up Randomized Controlled Trial

RecruitingHealthy volunteers welcome
  • National Cancer Institute (NCI), Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Aug 24, 2026 · NCT05361811

Natural History of Individuals With Immune System Problems That Lead to Fungal Infections

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 99 Years · All sexes · Updated Aug 24, 2026 · NCT01386437

Studies of Disorders With Increased Susceptibility to Fungal Infections

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 85 · All sexes · Updated Aug 24, 2026 · NCT01222741

Top-Down Attentional Control of Visual-Processing

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Aug 24, 2026 · NCT01087281

Registry of Asthma Characterization and Recruitment 3 (RACR3)

RecruitingObservational studyHealthy volunteers welcome
  • Children's National Medical Center: Inner City Asthma Consortium (ICAC) Clinical Research Site, Washington D.C.
All ages · All sexes · Updated Aug 21, 2026 · NCT05272241

PET Imaging of Cyclooxygenase in Participants With Major Depressive Disorder (MDD)

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 70 · All sexes · Updated Aug 18, 2026 · NCT04582916

Observational Study of Advanced Data Analytics in Genetic Conditions

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 120 Years · All sexes · Updated Aug 18, 2026 · NCT05657405

Cerebral Palsy and the Study of Brain Activity During Motor Tasks

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 5 to 100 · All sexes · Updated Aug 18, 2026 · NCT01829724

PET Imaging of Cyclooxygenase-1 in Participants With Neurological Manifestations of Post-Acute Sequelae of SARS-CoV-2 Infection (PASC)

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 70 · All sexes · Updated Aug 18, 2026 · NCT06920628

Assessment of 11C-JMJ-129 for Imaging PDE4D in Brain and Whole Body of Healthy Volunteers

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 101 · All sexes · Updated Aug 18, 2026 · NCT06874205

Collection of Peripheral Blood Mononuclear Cells (PBMCs) From Healthy People for the Expansion of T Cells for Adoptive Cell Therapy

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · All sexes · Updated Aug 17, 2026 · NCT02821806

Biochemical and Phenotypical Aspects of Smith-Lemli-Opitz Syndrome and Related Disorders of Cholesterol Metabolism

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 100 Years · All sexes · Updated Aug 17, 2026 · NCT05047354

Genotype -Phenotype Correlation of PKLR Variants With Pyruvate Kinase, 2,3-Diphosphglycerate and Adenosine Triphosphate Activities in Red Blood Cells of People With Sickle Cell Disease

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 80 · All sexes · Updated Aug 17, 2026 · NCT03685721

Study to Evaluate the Safety of Retreatment With Restylane® Lyft With Lidocaine for Augmentation of the Chin Region

RecruitingHealthy volunteers welcome
  • Galderma Investigational Site # 7043, Bethesda · 7 mi away
Ages 22 and older · All sexes · Updated Aug 14, 2026 · NCT07566286

Clinical, Molecular and Imaging Biomarkers in Spinal and Bulbar Muscular Atrophy (SBMA)

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · Men · Updated Aug 13, 2026 · NCT04944940

Androgen Receptor, Implications for Health and Wellbeing: Natural History Study of Individuals With Androgen Insensitivity

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 8 to 99 · All sexes · Updated Aug 13, 2026 · NCT04708431

Non-Alcoholic Fatty Liver Disease, the HEpatic Response to Oral Glucose, and the Effect of Semaglutide (NAFLD HEROES)

RecruitingPhase 2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Aug 10, 2026 · NCT03884075

Virtual Reality Mobility Assessment of Functional Vision in Retinal Disease

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 5 to 120 · All sexes · Updated Aug 10, 2026 · NCT04289571

Adaptive Optics Retinal Imaging

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 12 to 120 · All sexes · Updated Aug 10, 2026 · NCT02317328

Detection and Characterization of Neurologic Manifestations of Inborn and Acquired Errors of Immunity

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 120 · All sexes · Updated Aug 5, 2026 · NCT06169150

Evaluating Gardasil HPV Vaccine Humoral and Cellular Immune Responses in People With and Without HIV

RecruitingPhase 2Healthy volunteers welcome
  • RIIS Clinic at HIPS, Washington D.C.
Ages 18 to 70 · Men · Updated Aug 5, 2026 · NCT06624839

Pupillary Dilation Reflex in Healthy Volunteers

RecruitingObservational studyHealthy volunteers welcome
  • Children's National Hospital, Washington D.C.
Ages 18 to 60 · All sexes · Updated Aug 4, 2026 · NCT07746167

Platelet Volunteers, Longitudinal and Multi-omic Study

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Jul 31, 2026 · NCT07137429

Double-blind Placebo Controlled Study to Evaluate the Effect of NAD+ Boosting With Nicotinamide Riboside on Immunometabolism and Immunity in Systemic Lupus Erythematosus

RecruitingPhase 1/2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · Women · Updated Jul 31, 2026 · NCT06032923

ARTFL LEFFTDS Longitudinal Frontotemporal Lobar Degeneration (ALLFTD)

RecruitingObservational studyHealthy volunteers welcome
  • NIH, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Jul 30, 2026 · NCT04363684

Physiologic Measure of VIPN

RecruitingObservational studyHealthy volunteers welcome
  • Children's National Health System, Washington D.C.
Ages 6 to 18 · All sexes · Updated Jul 24, 2026 · NCT04786977

Comprehensive Molecular and Clinical Evaluation of Pediatric and Adult MDS

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
1 Day – 120 Years · All sexes · Updated Jul 23, 2026 · NCT05350748

Natural History of Autosomal Dominant Hearing Loss

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 3 to 99 · All sexes · Updated Jul 23, 2026 · NCT04501081

Collection of Blood, Bone Marrow, Skin, Saliva, and Stool Samples From Healthy Volunteers Used for Comparative Analysis of Myeloid Malignancies

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · All sexes · Updated Jul 23, 2026 · NCT05588154

Mechanisms Underlying Individual Variations of Taste and Smell in Obesity

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Jul 22, 2026 · NCT04714892

Study of Skeletal Disorders

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
2 Months – 100 Years · All sexes · Updated Jul 20, 2026 · NCT05031507

Safety, Tolerability, and Bioeffects of Alirocumab in Non-treatment Seeking Heavy Drinkers

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 21 to 65 · All sexes · Updated Jul 20, 2026 · NCT04781322

Motiva Implants® Post-Approval Study

RecruitingHealthy volunteers welcome
  • Advanced Plastic Surgery, LLC, Washington D.C.
  • Center for Plastic Surgery, Chevy Chase · 8 mi away
Ages 22 and older · Women · Updated Jul 17, 2026 · NCT06938399

Natural History of Dysregulation and Aging of the Immune System in People With Trisomy 21 With and Without Thymectomy

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 1 to 120 · All sexes · Updated Jul 16, 2026 · NCT07416201

Assistance Delivery and Muscle Coordination

RecruitingEarly phase 1Healthy volunteers welcome
  • Catholic University of America, Washington D.C.
Ages 20 to 80 · All sexes · Updated Jul 15, 2026 · NCT07011173

Health-E You Efficacy Trial for Male Adolescents

RecruitingHealthy volunteers welcome
  • Children's National Hospital, Washington D.C.
Ages 13 to 21 · Men · Updated Jul 15, 2026 · NCT06525064

Testing the Effect of the Broccoli Seed and Sprout Extract, Avmacol ES, on the Cancer Causing Substances of Tobacco in Heavy Smokers

RecruitingPhase 2Healthy volunteers welcome
  • George Washington University Medical Center, Washington D.C.
Ages 18 and older · All sexes · Updated Jul 14, 2026 · NCT05121051

Changing Youth Narratives on Firearm Violence ("Run It Up") Intervention

RecruitingHealthy volunteers welcome
  • George Washington University Milken Institute School of Public Health, Washington D.C.
Ages 11 and older · All sexes · Updated Jul 14, 2026 · NCT06940362

Multicenter Trial of Antibiotic Eluting Graft for Promoting New Bone Growth in/Near Infected Bone Cavities

RecruitingHealthy volunteers welcome
  • Georgetown University Medical Center, Washington D.C.
Ages 22 and older · All sexes · Updated Jul 14, 2026 · NCT05361941

Predicting Future Errors During Skill Performance

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 35 · All sexes · Updated Jul 9, 2026 · NCT06707207

AMI Construction in Lower Extremity Residual Limbs

RecruitingHealthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Jul 9, 2026 · NCT04063592

A Novel Approach to Upper Extremity Amputation to Augment Volitional Control and Restore Proprioception

RecruitingHealthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Jul 9, 2026 · NCT03882073

Does Social Media Impact Adolescent Mental Health?

RecruitingHealthy volunteers welcome
  • Georgetown University, Washington D.C.
Ages 10 to 14 · All sexes · Updated Jul 8, 2026 · NCT06049888

Natural History, Epidemiology and Pathogenesis of Severe HPV-Related Diseases (Neptune)

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 3 to 100 · All sexes · Updated Jul 6, 2026 · NCT05026138

Protocol CAUSE-03 / CHEETAH

RecruitingObservational studyHealthy volunteers welcome
  • Children's National Medical Center: Children's Research Institute, Washington D.C.
Ages 6 to 17 · All sexes · Updated Jul 1, 2026 · NCT06136091

Behavioral and Functional Task Development, Implementation, and Testing

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Jun 30, 2026 · NCT02108054

Lorlatinib for Newly-Diagnosed High-Grade Glioma With ROS or ALK Fusion

RecruitingEarly phase 1Healthy volunteers welcome
  • Children's National Medical Center, Washington D.C.
Ages 1 to 21 · All sexes · Updated Jun 29, 2026 · NCT06333899

Deep Phenotyping of Hearing Instability Disorders: Cohort Establishment, Biomarker Identification, Development of Novel Phenotyping Measures, and Discovery of Therapeutic Targets

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 80 · All sexes · Updated Jun 29, 2026 · NCT04806282

Cognitive Outcomes After Brain Substructure-informed Radiation Planning in Pediatric Patients

RecruitingHealthy volunteers welcome
  • Sibley Memorial Hospital, Washington D.C.
Ages 1 to 26 · All sexes · Updated Jun 29, 2026 · NCT05658731

Molecular Genetics Studies of Cancer Patients and Their Relatives

RecruitingObservational studyHealthy volunteers welcome
  • Suburban Hospital, Bethesda · 7 mi away
All ages · All sexes · Updated Jun 29, 2026 · NCT04185935

COVID-19 Pandemic Impact on Alcohol (PIA) - A Natural History Study

RecruitingObservational studyHealthy volunteers welcome
  • NIAAA Section on Human Psychopharmacology, Bethesda · 7 mi away
Ages 18 to 100 · All sexes · Updated Jun 24, 2026 · NCT04391816

Investigating New Methods to Study Movement in Children and Young Adults With Movement Disorders.

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 5 to 25 · All sexes · Updated Jun 23, 2026 · NCT06498596

Evaluate the Efficacy and Safety of Ruxolitinib on Hair Regrowth in Patients With Autoimmune Polyendocrinopathy Candidiasis Ectodermal Dystrophy (APECED)-Associated Alopecia Areata

RecruitingPhase 2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 12 to 75 · All sexes · Updated Jun 22, 2026 · NCT05398809

Childhood Cancer Survivor Study

RecruitingObservational studyHealthy volunteers welcome
  • Children's National Medical Center, Washington D.C.
All ages · All sexes · Updated Jun 17, 2026 · NCT01120353

Human Milk Oligosaccharide-Based Synbiotic Supplement for Intestinal Microbiota Dysbiosis

RecruitingEarly phase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 99 · All sexes · Updated Jun 16, 2026 · NCT06615986

STS/ACC TVT Registry Mitral Module

RecruitingObservational studyHealthy volunteers welcome
  • American College of Cardiology, Washington D.C.
Ages 1 and older · All sexes · Updated Jun 15, 2026 · NCT02245763

Phase I/II Study to Reduce Post-transplantation Cyclophosphamide Dosing for Older or Unfit Patients Undergoing Bone Marrow Transplantation for Hematologic Malignancies

RecruitingPhase 1/2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 12 to 85 · All sexes · Updated Jun 11, 2026 · NCT04959175

Follow-Up Study of Subjects Previously Enrolled in Poxviral Vector Gene Transfer Studies

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Jun 5, 2026 · NCT00451022

Pathological Basis of MRI Signal Changes in Multiple Sclerosis

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · All sexes · Updated Jun 5, 2026 · NCT02659956

Longitudinal Investigation of Sleep, Memory, and Brain Development Across the Nap Transition

RecruitingHealthy volunteers welcome
  • University of Maryland, College Park · 8 mi away
36 Months – 60 Months · All sexes · Updated Jun 4, 2026 · NCT06351098

Controlled Human Infection Study of Orally Administered Trichuris Trichiura Eggs in Naïve Adults

RecruitingPhase 1Healthy volunteers welcome
  • George Washington University Medical Faculty Associates, Washington D.C.
  • NIH Clinical Center, Bethesda · 7 mi away
Ages 18 to 45 · All sexes · Updated Jun 4, 2026 · NCT05706116

Pre- and Post-neuromusculoskeletal Injury Risk Evaluation for Return-to-Duty Enhancement

RecruitingObservational studyHealthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 to 44 · All sexes · Updated Jun 3, 2026 · NCT05111925

Natural History Study to Determine Drug Metabolism Phenotype and Appropriate Germline Source DNA in Patients Undergoing Allogeneic Hematopoietic Stem Cell Transplant

RecruitingObservational studyHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 120 · All sexes · Updated May 27, 2026 · NCT06856226

Sensory Feedback and Hand Motor Adaptation

RecruitingEarly phase 1Healthy volunteers welcome
  • Catholic University of America, Washington D.C.
Ages 20 to 70 · All sexes · Updated May 22, 2026 · NCT07598695

Experimental Infection of Hookworm-naïve Adults With Dermally-applied Infectious Necator Americanus Hookworm Larvae

RecruitingPhase 1Healthy volunteers welcome
  • George Washington University Medical Faculty Associates, Washington D.C.
Ages 18 to 45 · All sexes · Updated May 18, 2026 · NCT01940757

Late Onset Alzheimer's Disease

RecruitingObservational studyHealthy volunteers welcome
  • University of Washington, Washington D.C.
Ages 55 and older · All sexes · Updated May 18, 2026 · NCT05010603

Genes and Environment in Multiple Sclerosis

RecruitingObservational studyHealthy volunteers welcome
  • National Institute of Neurological Disorders and Stroke, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated May 14, 2026 · NCT01353547

Diagnosis of Abdominal Pain Using RNA Levels: The NATURAL Study

RecruitingObservational studyHealthy volunteers welcome
  • Children's National Hospital, Washington D.C.
Ages 7 and older · All sexes · Updated May 12, 2026 · NCT07579312

Bundled Cancer Screening and Genetic Services Navigation

RecruitingHealthy volunteers welcome
  • Georgetown University, Washington D.C.
Ages 45 to 74 · Women · Updated May 8, 2026 · NCT07228000

Adaptive Optics Retinal Imaging

RecruitingHealthy volunteers welcome
  • Food and Drug Administration, Silver Spring · 7 mi away
Ages 21 and older · All sexes · Updated May 8, 2026 · NCT05370287

A Study to Learn About mRNA Vaccines Against Influenza in Adults

RecruitingPhase 2Healthy volunteers welcome
  • George Washington Medical Faculty Associates, Washington D.C.
Ages 18 and older · All sexes · Updated May 6, 2026 · NCT07431853

HDClarity: a Multi-site Cerebrospinal Fluid Collection Initiative to Facilitate Therapeutic Development for Huntington's Disease

RecruitingObservational studyHealthy volunteers welcome
  • Georgetown University, Washington D.C.
Ages 11 to 75 · All sexes · Updated Apr 27, 2026 · NCT02855476

Hemoglobin Testing in Pregnant Patients

RecruitingObservational studyHealthy volunteers welcome
  • George Washington University, Washington D.C.
Ages 18 to 50 · Women · Updated Apr 23, 2026 · NCT05977686

Cancer Experience Registry (CER) for Cancer Patients and Caregivers

RecruitingObservational studyHealthy volunteers welcome
  • Cancer Support Community Research & Training Institute, Washington D.C.
Ages 18 and older · All sexes · Updated Apr 23, 2026 · NCT02333604

Tender Loving Care for Recurrent Pregnancy Loss

RecruitingHealthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 to 44 · Women · Updated Apr 22, 2026 · NCT06182878

Safety and Immunogenicity of Ad4-HIV Envelope Vaccine Vectors in Healthy Volunteers

RecruitingPhase 1Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Apr 21, 2026 · NCT03878121

NSS Grocery Store Brazil

RecruitingHealthy volunteers welcome
  • Milken Institute School of Public Health, Washington D.C.
Ages 20 and older · All sexes · Updated Apr 15, 2026 · NCT07249008

The CARING Study: Creating and Restoring Health Through Nutrition Guidance

RecruitingHealthy volunteers welcome
  • Physicians Committee for Responsible Medicine, Washington D.C.
Ages 18 and older · All sexes · Updated Apr 13, 2026 · NCT05795439

Dinner Time for Obesity and Prediabetes

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 18 to 50 · All sexes · Updated Apr 13, 2026 · NCT05745441

Intraperitoneal Infusion of Analgesic for Postoperative Pain Management

RecruitingPhase 4Healthy volunteers welcome
  • MedStar Washington Hospital Center, Washington D.C.
  • The GW Medical Faculty Associates, Washington D.C.
Ages 18 to 65 · Women · Updated Apr 9, 2026 · NCT04130464

Role of GABAergic Transmission in Auditory Processing in Autism Spectrum Disorder

RecruitingHealthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 11 to 25 · All sexes · Updated Apr 9, 2026 · NCT04798274

DILIN - Prospective Study

RecruitingObservational studyHealthy volunteers welcome
  • NIH Clinical Site, Bethesda · 7 mi away
Ages 2 and older · All sexes · Updated Apr 8, 2026 · NCT00345930

Prevention of Postpartum Hemorrhage With Tranexamic Acid

RecruitingPhase 2Healthy volunteers welcome
  • George Washington University Hospital, Washington D.C.
Ages 18 to 50 · Women · Updated Mar 27, 2026 · NCT05370820

Implementing a Scalable Smoke-free Home Intervention in Armenia and Georgia

RecruitingHealthy volunteers welcome
  • George Washington University, Washington D.C.
Ages 18 and older · All sexes · Updated Mar 23, 2026 · NCT06166433

De-escalation of Adjuvant Radiation for Low-Risk HPV Oropharyngeal Cancers

RecruitingHealthy volunteers welcome
  • Medstar Georgetown University Hospital, Washington D.C.
Ages 18 and older · All sexes · Updated Mar 23, 2026 · NCT06554158

Health Information Technology to Reduce Disparities in Adolescent Health Outcomes: A Pragmatic Trial

RecruitingHealthy volunteers welcome
  • Children's National Hospital, Washington D.C.
Ages 15 to 21 · All sexes · Updated Mar 18, 2026 · NCT04372875

Effects of Combination Exercise on Fatigability in Veterans With Chronic Kidney Disease

RecruitingHealthy volunteers welcome
  • Washington DC VA Medical Center, Washington, DC, Washington D.C.
Ages 50 to 85 · All sexes · Updated Mar 12, 2026 · NCT04397159

Effects of a Non-nutritive Sweetener Reduction Intervention in Pregnancy and Lactation on Maternal and Infant Outcomes

RecruitingHealthy volunteers welcome
  • The George Washington University, Washington D.C.
Ages 18 to 45 · Women · Updated Feb 18, 2026 · NCT06548828

Social & QoL Behaviors in Parkinson's Disease

RecruitingObservational studyHealthy volunteers welcome
  • The George Washington University, Washington D.C.
Ages 40 and older · All sexes · Updated Feb 13, 2026 · NCT06385184

Repeat Peripheral Blood Stem Cell Transplantation for Patients With Sickle Cell Disease and Falling Donor Myeloid Chimerism Levels

RecruitingPhase 1/2Healthy volunteers welcome
  • National Institutes of Health Clinical Center, Bethesda · 7 mi away
Ages 2 to 80 · All sexes · Updated Feb 5, 2026 · NCT04008368

North American Mitochondrial Disease Consortium Patient Registry and Biorepository (NAMDC)

RecruitingObservational studyHealthy volunteers welcome
  • Children's National Medical Center, Washington D.C.
All ages · All sexes · Updated Feb 4, 2026 · NCT01694940

The DC Cohort Longitudinal HIV Status Neutral Study

RecruitingObservational studyHealthy volunteers welcome
  • Kaiser Permanente Mid-Atlantic States, Washington D.C.
  • Unity Health Care, Washington D.C.
  • Georgetown University, Washington D.C.
  • and 11 more
All ages · All sexes · Updated Feb 2, 2026 · NCT01206920

Defense and Veterans Center for Integrative Pain Management (DVCIPM) Pain Registry Biobank

RecruitingObservational studyHealthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 to 80 · All sexes · Updated Jan 28, 2026 · NCT04004286

Post-Concussion Musculoskeletal Injury Risks

RecruitingObservational studyHealthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 to 40 · All sexes · Updated Jan 27, 2026 · NCT05122728

Effectiveness Study of a Lifestyle Intervention Versus Metformin in Mothers With Recent Gestational Diabetes

RecruitingPhase 2Healthy volunteers welcome
  • Milken Institute School of Public Health - The George Washington University, Washington D.C.
Ages 18 to 45 · Women · Updated Jan 13, 2026 · NCT06948825

Using the Smart Underwear Device to Determine a Baseline of Flatus Activity Normalized to Fiber Intake

RecruitingObservational studyHealthy volunteers welcome
  • Bioscience Research Building, College Park · 8 mi away
  • University of Maryland Bioscience Research Building, College Park · 8 mi away
Ages 18 and older · All sexes · Updated Dec 23, 2025 · NCT07134543

Omega-3D: Omega-3 for Diet-Driven Health Disparities

RecruitingPhase 2Healthy volunteers welcome
  • Georgetown University, Washington D.C.
Ages 18 to 64 · All sexes · Updated Dec 16, 2025 · NCT07078344

Retinal Blood Flow and Autoregulation

RecruitingPhase 4Healthy volunteers welcome
  • Food and Drug Administration (FDA), Silver Spring · 7 mi away
Ages 18 to 88 · All sexes · Updated Dec 2, 2025 · NCT05344274

Target ALS Biomarker Study; Longitudinal Biofluids, Clinical Measures, and At Home Measures

RecruitingObservational studyHealthy volunteers welcome
  • Georgetown University, Georgetown · 2 mi away
Ages 18 and older · All sexes · Updated Nov 21, 2025 · NCT05137665

Comparison of Transforming Powder Dressing to NPIAP Recommended Standard of Care Therapies in Stage 2, 3 and 4 Pressure Injuries

RecruitingHealthy volunteers welcome
  • Medstar Georgetown University Hospital, Washington D.C.
  • MedStar National Rehabilitation Hospital, Washington D.C.
Ages 18 to 85 · All sexes · Updated Nov 20, 2025 · NCT05496296

Acute Partial Thickness Burn Study Comparing Transforming Powder Dressing to Standard of Care Dressing

RecruitingPhase 4Healthy volunteers welcome
  • MedStar Washington Hospital Center, Washington D.C.
Ages 18 to 65 · All sexes · Updated Nov 19, 2025 · NCT05424354

Polygenic Risk Stratification Combined With mpMRI to Identify Clinically Relevant Prostate Cancer

RecruitingHealthy volunteers welcome
  • Howard University Hospital, Washington D.C.
  • National Cancer Institute, Bethesda · 7 mi away
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 40 to 69 · Men · Updated Nov 10, 2025 · NCT06398639

Peer Behavioral Activation Utilization to Improve Substance Use and HIV Outcomes in People Receiving Long Acting Injectable-PrEP/ART (PUSH)

RecruitingHealthy volunteers welcome
  • HIPS (Harm reduction drop-in center), Washington D.C.
Ages 18 to 88 · All sexes · Updated Oct 31, 2025 · NCT06501781

Empowering Young Parents: Building Healthy Relationships Study

RecruitingHealthy volunteers welcome
  • Healthy Generations Program at Children's National Hospital, Washington D.C.
Ages 14 to 21 · Women · Updated Oct 30, 2025 · NCT06576193

Addressing Genomic Disparities in Cancer Survivors

RecruitingHealthy volunteers welcome
  • Georgetown Lombardi Comprehensive Cancer Center, Washington D.C.
Ages 18 to 80 · All sexes · Updated Oct 28, 2025 · NCT06073626

An Evaluation of an Online Sexual Assault Resistance Program (IDEA3)

RecruitingHealthy volunteers welcome
  • University of Maryland, College Park · 8 mi away
Ages 17 to 24 · All sexes · Updated Oct 21, 2025 · NCT06058455

Get Better Together: Relationship Education For Military Couples

RecruitingHealthy volunteers welcome
  • Uniformed Services University of the Health Sciences, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Oct 20, 2025 · NCT07096271

Natural History Evaluation of Charcot Marie Tooth Disease (CMT) Types CMT1B, CMT2A, CMT4A, CMT4C, and Others

RecruitingObservational studyHealthy volunteers welcome
  • Children's National Hospital, Washington D.C.
All ages · All sexes · Updated Oct 7, 2025 · NCT01193075

Cerebellum and Autism: Regional Specialization for Social and Executive Functions

RecruitingHealthy volunteers welcome
  • American University, Washington D.C.
Ages 18 to 35 · All sexes · Updated Oct 2, 2025 · NCT05396352

Augmented Reality For MRI-Guided Interventions

RecruitingHealthy volunteers welcome
  • Children's National Hospital, Washington D.C.
Ages 3 to 21 · All sexes · Updated Sep 5, 2025 · NCT06224933

SC2i Tissue and Data Repository Protocol

RecruitingObservational studyHealthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Sep 4, 2025 · NCT02182180

Evaluation of Global Smart Drinking Goals Initiative

RecruitingHealthy volunteers welcome
  • HBSA, Calverton · 12 mi away
Ages 12 and older · All sexes · Updated Sep 3, 2025 · NCT03262259

CONTIGO - A Narrative Intervention to Enhance Genetic Counseling and Testing

RecruitingHealthy volunteers welcome
  • Georgetown Lombardi Comprehensive Cancer Center, Washington D.C.
Ages 18 and older · Women · Updated Aug 28, 2025 · NCT05130606

Connect to Baby: A Pilot Study of a Parenting and Coparenting Program

RecruitingHealthy volunteers welcome
  • Child Development and Social Policy Lab, Washington D.C.
2 Months – 40 Years · All sexes · Updated Aug 19, 2025 · NCT06179576

Apple Health Study

RecruitingObservational studyHealthy volunteers welcome
  • MCRA, Washington D.C.
Ages 18 and older · All sexes · Updated Jul 29, 2025 · NCT06958523

The Effect of Sex Steroid Replacement Therapy in the Hypogonadism and Transgender Active-Duty Population

RecruitingObservational studyHealthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Jul 29, 2025 · NCT06247267

Transcranial Electrical Stimulation (TES) at Slow Oscillation (SO) Frequency During NREM Sleep

RecruitingHealthy volunteers welcome
  • Naval Medcical Research Center (NMRC) Clincal Trials Center, Bethesda · 7 mi away
Ages 18 to 39 · All sexes · Updated Jun 13, 2025 · NCT02945501

Speech Perception and High Cognitive Demand

RecruitingHealthy volunteers welcome
  • Department of Hearing and Speech Sciences, College Park · 8 mi away
  • Maryland Neuroimaging Center, College Park · 8 mi away
Ages 65 to 85 · All sexes · Updated Apr 8, 2025 · NCT04997577

Intervention to Enhance PrEP Persistence

RecruitingHealthy volunteers welcome
  • Whitman Walker Health, Washington D.C.
Ages 18 and older · Men · Updated Mar 12, 2025 · NCT06872307

Predictors of Health Service Utilizations Among Key Population in Washington DC

RecruitingObservational studyHealthy volunteers welcome
  • Us Helping Us, People into Living Inc, Washington D.C.
Ages 18 and older · All sexes · Updated Mar 10, 2025 · NCT06046079

Bladder Botox UTI Antibiotic Prophylaxis

RecruitingPhase 4Healthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Feb 19, 2025 · NCT06387329

An Evaluation of Two PTSD Assessments in an Active Duty and Military Veteran Sample

RecruitingObservational studyHealthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Jan 23, 2025 · NCT04180930

A Patient and Provider Intervention to Address Health Disparities in Lung Cancer Screening

RecruitingHealthy volunteers welcome
  • MedStar Health, Washington D.C.
Ages 50 to 80 · All sexes · Updated Dec 27, 2024 · NCT04675476

Effect of Intradetrusor onabotulinumtoxinA Injection Versus Conservative Management on Female Sexual Function in Patients With Bladder Pain Syndrome

RecruitingObservational studyHealthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 to 99 · Women · Updated Dec 11, 2024 · NCT06729151

Covid-19 Long Haul Preventative and Health Promotion Care Clinical Trial Acceleration Program.

RecruitingPhase 4Healthy volunteers welcome
  • NIH Clinical Center, Bethesda · 7 mi away
Ages 18 to 65 · All sexes · Updated Nov 27, 2024 · NCT06441955

ReadMap: Reading in Stroke Alexia and Typical Aging

RecruitingObservational studyHealthy volunteers welcome
  • Georgetown University Medical Center, Washington D.C.
Ages 18 and older · All sexes · Updated Nov 21, 2024 · NCT06700005

Focused Ultrasound for the Complex Patient

RecruitingHealthy volunteers welcome
  • Washington DC Veterans Affairs Medical Center, Washington D.C.
Ages 18 to 75 · All sexes · Updated Nov 20, 2024 · NCT06453109

Neurocognitive Mechanisms of Sentence Production Impairment in Aphasia

RecruitingHealthy volunteers welcome
  • University of Maryland, College Park · 8 mi away
Ages 18 and older · All sexes · Updated Sep 3, 2024 · NCT06405594

Vaginal Estradiol vs Oral Beta-3 Agonist for Overactive Bladder Syndrome

RecruitingPhase 4Healthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 and older · Women · Updated Aug 19, 2024 · NCT05221021

Acoustic Stimulation During Restricted Sleep After Sleep Deprivation

RecruitingHealthy volunteers welcome
  • Walter Reed Army Institute of Research, Silver Spring · 7 mi away
Ages 18 to 39 · All sexes · Updated Apr 23, 2024 · NCT05309473

Diabetes Reversal Online Program and Study (DROP Study)

RecruitingHealthy volunteers welcome
  • Physician Committee for Responsible Medicine, Washington D.C.
Ages 18 and older · All sexes · Updated Apr 18, 2024 · NCT05572502

Enroll -HD: A Prospective Registry Study in a Global Huntington's Disease Cohort

RecruitingObservational studyHealthy volunteers welcome
  • Georgetown University, Washington D.C.
Ages 18 and older · All sexes · Updated Feb 28, 2024 · NCT01574053

The Effect of Teprotumumab on Thyroid Eye Disease and Thyroid Dysfunction

RecruitingObservational studyHealthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Feb 23, 2024 · NCT06275373

The PCOS Challenge Study

RecruitingObservational studyHealthy volunteers welcome
  • PCOS Challenge: The National Polycystic Ovary Syndrome Association, Bethesda · 7 mi away
Ages 12 to 80 · Women · Updated Apr 4, 2023 · NCT05797909

Comparing Mobile Health Strategies to Improve Pre-exposure Prophylaxis Use (PrEP) for HIV Prevention

RecruitingHealthy volunteers welcome
  • Whitman-Walker Health, Washington D.C.
Ages 15 and older · All sexes · Updated Sep 28, 2022 · NCT04855773

Bronchiectasis and NTM Research Registry

RecruitingObservational studyHealthy volunteers welcome
  • COPD Foundation, Washington D.C.
Ages 18 to 120 · All sexes · Updated Mar 22, 2022 · NCT01822834

COPD Patient-Powered Research Network

RecruitingObservational studyHealthy volunteers welcome
  • COPD Foundation, Washington D.C.
Ages 18 and older · All sexes · Updated Mar 10, 2022 · NCT02803242

Standard Injections Versus Reduced Injections for Intravesical onabotulinumtoxinA Treatment of Overactive Bladder

RecruitingPhase 4Healthy volunteers welcome
  • Walter Reed National Military Medical Center, Bethesda · 7 mi away
Ages 18 and older · All sexes · Updated Apr 28, 2020 · NCT04020510

DC Longitudinal Study on Aging and Specimen Bank

RecruitingObservational studyHealthy volunteers welcome
  • Georgetown University Memory Disorders Program, Washington D.C.
Ages 45 and older · All sexes · Updated Oct 24, 2019 · NCT03702907

From ClinicalTrials.gov, data retrieved Oct 6, 2026. Each study sets its own eligibility; the study team decides who can join.