Paid Clinical Trials in California

California has 6,384 paid clinical trials enrolling now across cities including Los Angeles, San Francisco and San Diego. Search by condition, age, or phase to find compensated research studies accepting participants near you.

Research sites in California include Stanford Medicine, UCLA Health and UCSF, running studies across oncology, cardiology, neurology, and more. Both patients and healthy volunteers may qualify. Most studies offer compensation for time and travel.

Recruiting trial data synced daily from ClinicalTrials.gov. Last sync: July 28, 2026.

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5,286 clinical trials

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A Phase 1/2A, Randomized Study of a T Follicular Helper (TFH)-Targeting Genetic Vaccine Strategy Designed to Induce Broad, Durable Immune Responses

for COVID-19

Sites in Los Angeles & San Francisco

Sponsor: Kara Chew

Sex: All·Age: 40 - 64·Accepts healthy volunteers

Code: NCT06810934·Phase 1, Phase 2·Recruiting·Listed Feb 2025

Apply to this trial

WALNUTS for POWER: Polyphenols, Omega-3 Fatty Acids, Weight Loss, and EneRgy

for Prostate Cancer

1 location in Los Angeles

Sponsor: Stephen Freedland

Sex: Male·Age: 18+

Code: NCT03824652·Phase 2·Recruiting·Listed Jan 2019

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Biologically Guided Radiation Therapy (BgRT) and Stereotactic Body Radiation Therapy (SBRT) to Tyrosine Kinase Inhibitor in Oligoprogressive Oncogenic Positive Non-Small Cell Lung Carcinoma

for Lung Non-Small Cell Carcinoma

Sites in Duarte +1 more location

Sponsor: City of Hope Medical Center

Sex: All·Age: 18+

Code: NCT06014827·Phase 2·Recruiting·Listed Aug 2023

Apply to this trial

A Hybrid 1 Effectiveness-Implementation Trial of Partner-Assisted Prolonged Exposure for PTSD

for Post Traumatic Stress Disorder

Sites in San Diego +3 more locations

Sponsor: United States Department of Defense

Sex: All·Age: 18+

Code: NCT06990191·Recruiting·Listed May 2025

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Comparison of New SUREcore Biopsy of Needle to Standard of Care During Transperineal Prostate Biopsies

for Prostate Cancer

1 location in Sacramento

Sponsor: University of California, Davis

Sex: Male·Age: 18+

Code: NCT06907446·Recruiting·Listed Apr 2025

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Acetazolamide in Persons With Type 1 Diabetes - Crossover Trial

for Type 1 Diabetes

1 location in La Jolla

Sponsor: University of California, San Diego

Sex: All·Age: 18+

Code: NCT06981234·Phase 2·Recruiting·Listed May 2025

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American Hepato-Pancreato-Biliary Association (AHPBA) Pancreatic Irreversible Electroporation (IRE) Registry

for Pancreatic Cancer

Sites in San Diego +10 more locations

Sponsor: University of Louisville

Sex: All·Age: 18+

Code: NCT02674100·Recruiting·Listed Feb 2016

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Pediatric Pulmonary Hypertension Network (PPHNet) Informatics Registry

for Pulmonary Vascular Disease

Sites in San Francisco, Palo Alto +11 more locations

Sponsor: New York Medical College

Sex: All·Age: 1 Day - 21

Code: NCT02249923·Recruiting·Listed Sep 2014

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Occupational Therapy for Adults Who Have Experienced Intimate Partner Violence (IPV)

for Domestic Violence

1 location in Loma Linda

Sponsor: Loma Linda University

Sex: All·Age: 18 - 70

Code: NCT06808828·Recruiting·Listed Feb 2025

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A Biobehavioral Intervention to Reduce Adverse Outcomes in Young Adult Testicular Cancer Survivors

for Testicular Cancer

1 location in Irvine

Sponsor: University of California, Irvine

Sex: Male·Age: 18 - 39

Code: NCT05836688·Recruiting·Listed May 2023

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Pulmonary Hemodynamics During Exercise - Research Network

for Pulmonary Circulation Diseases

Sites in Los Angeles +7 more locations

Sponsor: Medical University of Graz

Sex: All·Age: 18+

Code: NCT03954574·Recruiting·Listed May 2019

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A Comparative Effectiveness Study of PTSD Treatments Among Sexual and Gender Minority Populations

for PTSD

Sites in San Francisco & Palo Alto

Sponsor: Stanford University

Sex: All·Age: 18+

Code: NCT06367764·Recruiting·Listed Apr 2024

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Multi-Omics for Maternal Health After Preeclampsia

for Pre-Eclampsia

1 location in San Diego

Sponsor: University of California, San Diego

Sex: Female·Age: 18 - 50·Accepts healthy volunteers

Code: NCT06340152·Recruiting·Listed Apr 2024

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Clinical Translation of a Novel Brain PET Insert for Simultaneous PET/MR

for Brain Disease

1 location in Palo Alto

Sponsor: Stanford University

Sex: All·Age: 21+·Accepts healthy volunteers

Code: NCT04383808·Recruiting·Listed May 2020

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Network-targeted Theta-burst Stimulation for Episodic Memory Improvement in Mild Cognitive Impairment

for Cognitive Dysfunction

1 location in Los Angeles

Sponsor: University of California, Los Angeles

Sex: All·Age: 55 - 100

Code: NCT04558164·Recruiting·Listed Sep 2020

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Supportive Training After Cardiac Rehabilitation Including Virtual Engagement

for Adherence to Physical Activity After Completing Cardiac Rehabilitation (CR) in Older Adults

1 location in San Francisco

Sponsor: University of California, San Francisco

Sex: All·Age: 55 - 100

Code: NCT06701188·Recruiting·Listed Nov 2024

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Small Cell Lung Cancer Community Engagement to Eliminate Research Discepancies

for Small-cell Lung Cancer

Sites in Multiple Locations +51 more locations

Sponsor: Addario Lung Cancer Medical Institute

Sex: All·Age: 18+

Code: NCT06486428·Recruiting·Listed Jul 2024

Apply to this trial

HEPA, PM2.5, and Cardiometabolic Health

for Air Pollution

1 location in Los Angeles

Sponsor: University of Southern California

Sex: All·Age: 65 - 84·Accepts healthy volunteers

Code: NCT05718245·Recruiting·Listed Feb 2023

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EyeConic: Qualification for Cone-Optogenetics

for Retinal Dystrophies

Sites in San Francisco +2 more locations

Sponsor: Institute of Molecular and Clinical Ophthalmology Basel

Sex: All·Age: All ages·Accepts healthy volunteers

Code: NCT05294978·Recruiting·Listed Mar 2022

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MDMA-assisted Cognitive Processing Therapy Versus Cognitive Processing Therapy for Veterans With Severe Posttraumatic Stress Disorder

for PTSD

1 location in Palo Alto

Sponsor: Patricia Suppes

Sex: All·Age: 18+

Code: NCT05837845·Phase 2·Recruiting·Listed May 2023

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The Effects of Positive Airway Pressure on the Mucolytic Effects of NAC (TEAM)

for Asthma

1 location in San Francisco

Sponsor: University of California, San Francisco

Sex: All·Age: 18 - 85

Code: NCT06152653·Phase 4·Recruiting·Listed Dec 2023

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Patient Derived Vascularized MicroTumor Model of Gastrointestinal Peritoneal Carcinomatosis

for Peritoneal Carcinomatosis

1 location in Orange

Sponsor: University of California, Irvine

Sex: All·Age: 18+

Code: NCT05844865·Recruiting·Listed May 2023

Apply to this trial

KIDney Injury in Times of COVID-19 (KIDCOV)

for SARS-CoV Infection

Sites in San Francisco +2 more locations

Sponsor: University of California, San Francisco

Sex: All·Age: 18+·Accepts healthy volunteers

Code: NCT04705766·Recruiting·Listed Jan 2021

Apply to this trial

High Dose Aflibercept in Diabetic Macular Edema in Patients With Previous Vitrectomy

for Diabetic Macular Edema (DME)

Drug: Aflibercept

1 location in Fullerton

Sponsor: Retina Consultants of Orange County

Sex: All·Age: 21+

Code: NCT06662994·Phase 4·Recruiting·Listed Oct 2024

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WISE CVD - Continuation (WISE HFpEF)

for Microvascular Coronary Dysfunction

1 location in Los Angeles

Sponsor: Cedars-Sinai Medical Center

Sex: All·Age: 18+

Code: NCT02582021·Recruiting·Listed Oct 2015

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Determining the Role of Social Reward Learning in Social Anhedonia

for Psychosis

Sites in Los Angeles +1 more location

Sponsor: University of Alabama at Birmingham

Sex: All·Age: 18 - 35

Code: NCT05617898·Recruiting·Listed Nov 2022

Apply to this trial

Secondhand Tobacco Smoke and Cardiovascular Disease

for Cardiovascular Diseases

1 location in San Francisco

Sponsor: University of California, San Francisco

Sex: All·Age: 40+

Code: NCT04715568·Phase 4·Recruiting·Listed Jan 2021

Apply to this trial

HeartGPS: A Study Exploring the Effects of a Psychological Intervention for Parents and Their Babies After Prenatal Cardiac Diagnosis

for Heart Defects, Congenital

Sites in Los Angeles +1 more location

Sponsor: Children's Hospital Medical Center, Cincinnati

Sex: All·Age: 18+

Code: NCT06175104·Recruiting·Listed Dec 2023

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Virtual Reality Attention Management

for ADHD

1 location in Sacramento

Sponsor: University of California, Davis

Sex: All·Age: 8 - 12

Code: NCT03221244·Recruiting·Listed Jul 2017

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Danazol for Treatment of Cytopenias in Patients With Cirrhosis

for Cirrhosis, Liver

1 location in Los Angeles

Sponsor: University of Southern California

Sex: All·Age: 18+

Code: NCT04873102·Phase 2·Recruiting·Listed May 2021

Apply to this trial

DBS of the SCC for the Treatment of Medically Refractory CLBP

for Chronic Low-back Pain

Sites in Los Angeles +1 more location

Sponsor: University of California, Los Angeles

Sex: All·Age: 40 - 75

Code: NCT04085406·Recruiting·Listed Sep 2019

Apply to this trial

SCOPE: Observational Study of the Consequences of the Protease Inhibitor Era

for HIV Infections

1 location in San Francisco

Sponsor: University of California, San Francisco

Sex: All·Age: 18+

Code: NCT00187512·Recruiting·Listed Sep 2005

Apply to this trial

A Multicenter National Prospective Study of Pregnancy and Neonatal Outcomes in Women With Inflammatory Bowel Disease

for Inflammatory Bowel Disease

2 locations in San Francisco

Sponsor: University of California, San Francisco

Sex: Female·Age: 18 - 45

Code: NCT00904878·Recruiting·Listed May 2009

Apply to this trial

Closed-Loop Deep Brain Stimulation for Refractory Chronic Pain

for Spinal Cord Injuries

1 location in San Francisco

Sponsor: University of California, San Francisco

Sex: All·Age: 22 - 80

Code: NCT04144972·Recruiting·Listed Oct 2019

Apply to this trial

Electrical Stimulation for the Treatment of Optic Neuropathies

for Glaucoma

1 location in Palo Alto

Sponsor: Stanford University

Sex: All·Age: 18+

Code: NCT05626426·Recruiting·Listed Nov 2022

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Inflammation, Diabetes, Ethnicity and Obesity Cohort

for Obesity

1 location in San Francisco

Sponsor: University of California, San Francisco

Sex: All·Age: 18 - 75·Accepts healthy volunteers

Code: NCT03022682·Recruiting·Listed Jan 2017

Apply to this trial

Clinical and Biological Characteristics of Hidradenitis Suppurativa

for Hidradenitis Suppurativa

1 location in San Francisco

Sponsor: University of California, San Francisco

Sex: All·Age: 13+·Accepts healthy volunteers

Code: NCT03967600·Recruiting·Listed May 2019

Apply to this trial

Microbiome Sampling During Endurance Exercise

for Healthy

1 location in Stanford

Sponsor: Stanford University

Sex: All·Age: 18 - 80·Accepts healthy volunteers

Code: NCT06903806·Recruiting·Listed Apr 2025

Apply to this trial

Aesthetic Outcome of Tie-over Bolster Application in Surgical Wounds

for Scarring

1 location in Sacramento

Sponsor: University of California, Davis

Sex: All·Age: 18+

Code: NCT05758168·Recruiting·Listed Mar 2023

Apply to this trial

BrainWeighve App Feasibility Study

for Weight Loss

1 location in Los Angeles

Sponsor: University of California, Los Angeles

Sex: All·Age: 14 - 21·Accepts healthy volunteers

Code: NCT05530538·Recruiting·Listed Sep 2022

Apply to this trial