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7,120 recruiting studies with US sites, from the official ClinicalTrials.gov registry (refreshed Oct 26, 2026). No sign-up needed.
Most recently updated studies · page 139 of 297
- RecruitingHealthy volunteersPhase 2
Neurobiology of Suicide
National Institute of Mental Health (NIMH)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–70
- RecruitingHealthy volunteers
Development and Validation of Patient Reported Outcome (PRO) Measures for Individuals With Neurofibromatosis 1 (NF1) and Plexiform Neurofibromas (pNFs)
National Cancer Institute (NCI)
- Location
- Bethesda, MD + 1 other US site
- Eligibility basics
- Ages 5+
- RecruitingHealthy volunteers
Rod and Cone Mediated Function in Retinal Disease
National Eye Institute (NEI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 5–100
- RecruitingHealthy volunteers
Collection of Peripheral Blood Mononuclear Cells (PBMCs) From Healthy People for the Expansion of T Cells for Adoptive Cell Therapy
National Cancer Institute (NCI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–120
- RecruitingHealthy volunteers
Long-Term Follow up of Patients Undergoing Hematopoietic Stem Cell Transplantation, Cellular Therapy, or Gene Therapy
National Cancer Institute (NCI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 4–120
- RecruitingHealthy volunteersPhase 2/Phase 3
PET Tau - Neurodegenerative Disease Imaging
University of Pennsylvania
- Location
- Philadelphia, PA
- Eligibility basics
- Ages 18–100
- RecruitingHealthy volunteers
Perception, Sensation, Cognition and Action in Humans
National Eye Institute (NEI)
- Location
- Bethesda, MD + 1 other US site
- Eligibility basics
- Ages 13–65
- RecruitingHealthy volunteers
Early Tracking of Childhood Health Determinants (ETCHED) Study
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
- Location
- Phoenix, AZ
- Eligibility basics
- Ages 0 mo–99
- RecruitingHealthy volunteers
Natural History and Biospecimen Acquisition for Children and Adults With Rare Solid Tumors
National Cancer Institute (NCI)
- Location
- Bethesda, MD + 2 other US sites
- Eligibility basics
- Ages 1 mo+
- RecruitingHealthy volunteers
Long-Term Follow-Up of Survivors of Pediatric Cushing Disease
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 2–90
- RecruitingHealthy volunteers
Effects of Kinesio Tape on Delayed Onset Muscle Soreness
Indiana University
- Location
- Indianapolis, IN
- Eligibility basics
- Ages 18–30
- RecruitingHealthy volunteers
Successful Transitions and Reintegration Tools for Veterans (START-VETS)
VA Office of Research and Development
- Location
- Dallas, TX
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Unraveling the Mechanisms Underlying Primary Sclerosing Cholangitis Through a Multidisciplinary, Integrative Research Approach
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–90
- RecruitingHealthy volunteers
Food and Circadian Timing
Oregon Health and Science University
- Location
- Portland, OR
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Frequency and Clinical Phenotype of BAP1 Hereditary Predisposition Syndrome
Mohamed Abdel-Rahman
- Location
- Columbus, OH
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Cognitive Aftereffects of Neurotoxicity in Children and Young Adults With Relapsed/Refractory Hematologic Malignancies Who Receive CAR T-cell Therapy
National Cancer Institute (NCI)
- Location
- Los Angeles, CA + 2 other US sites
- Eligibility basics
- Ages 5+
- RecruitingHealthy volunteers
Comprehensive Molecular and Clinical Evaluation of Pediatric and Adult MDS
National Cancer Institute (NCI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 0 mo–120
- RecruitingHealthy volunteers
Rare Tumors and Cancer Predisposition in Individuals and Families
National Cancer Institute (NCI)
- Location
- Bethesda, MD + 1 other US site
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Acceptance and Commitment Therapy for Caregivers of Children With a RASopathy: An Internal Pilot Feasibility Study and Follow-up Randomized Controlled Trial
National Cancer Institute (NCI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 2
Prevention of Postpartum Hemorrhage With Tranexamic Acid
Inova Health Care Services
- Location
- Washington D.C., DC + 1 other US site
- Eligibility basics
- Ages 18–50 · Women only
- RecruitingHealthy volunteers
NIH Investigative Deep Phenotyping Study of Gulf War Veteran Health (Project NIH IN-DEPTH)
National Institute of Neurological Disorders and Stroke (NINDS)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 48–70
- RecruitingHealthy volunteers
Collection of Blood, Bone Marrow, Skin, Saliva, and Stool Samples From Healthy Volunteers Used for Comparative Analysis of Myeloid Malignancies
National Cancer Institute (NCI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–120
- RecruitingHealthy volunteers
Assessing and Improving Quantitative Magnetic Resonance Imaging Metrics in Human Subjects
National Institute of Neurological Disorders and Stroke (NINDS)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–100
- RecruitingHealthy volunteers
Provider-Mediated Communication of Genetic Testing Results to At-Risk Relatives of Cancer Patients to Improve Genetic Counseling and Testing Rates, Family HOPE Study
City of Hope Medical Center
- Location
- Duarte, CA
- Eligibility basics
- Ages 18+
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