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 29, 2026.

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5,286 clinical trials

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Model-based Electrical Brain Stimulation

for Medication Refractory Epilepsy Patients With Electrodes Already Implanted Based on Clinical Criteria for Standard Monitoring

Sites in Los Angeles & San Francisco

Sponsor: University of Southern California

Sex: All·Age: 18+

Code: NCT05327387·Recruiting·Listed Apr 2022

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Patient-Centered Approach for Treatment Decisions in Mitral Valve Prolapse

for Mitral Valve Prolapse

Sites in Los Angeles +4 more locations

Sponsor: Northwell Health

Sex: All·Age: 21+

Code: NCT06738537·Recruiting·Listed Dec 2024

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Tagraxofusp in Pediatric Patients With Relapsed or Refractory CD123 Expressing Hematologic Malignancies

for Hematologic Malignancy

Sites in Los Angeles, San Francisco +27 more locations

Sponsor: Therapeutic Advances in Childhood Leukemia Consortium

Sex: All·Age: 1 - 21

Code: NCT05476770·Phase 1·Recruiting·Listed Jul 2022

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Encoding Temporal Fine Structure for Cochlear Implants

for Hearing Loss

1 location in Los Angeles

Sponsor: University of Southern California

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

Code: NCT04708717·Recruiting·Listed Jan 2021

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Evaluating a Lifestyle Intervention to Prevent Recurrence of Diabetic Foot Ulcers

for Diabetic Foot

Sites in Los Angeles & Downey

Sponsor: University of Southern California

Sex: All·Age: 21+

Code: NCT06487780·Recruiting·Listed Jul 2024

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Text Education About Cardiovascular Health and HIV (TEACH-HIV)

for HIV

2 locations in San Francisco

Sponsor: University of California, San Francisco

Sex: All·Age: 40+

Code: NCT05642858·Recruiting·Listed Dec 2022

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A Study to Explore the Role of Gut Flora in COVID-19 Infection

for Gut Microbiome

1 location in Ventura

Sponsor: ProgenaBiome

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

Code: NCT04359836·Recruiting·Listed Apr 2020

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Large Language Models To Improve the Quality of Care of Cardiology Patients

for Hypertrophic Cardiomyopathy (HCM)

1 location in Palo Alto

Sponsor: Stanford University

Sex: All·Age: 18+

Code: NCT06935253·Recruiting·Listed Apr 2025

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Prospective Observational International Registry of Patients With Newly Diagnosed Peripheral T Cell Lymphoma.

for Peripheral T-Cell Lymphoma

1 location in Stanford

Sponsor: Associazione Angela Serra per la ricerca sul cancro

Sex: All·Age: 18+

Code: NCT03964480·Recruiting·Listed May 2019

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Effect of Snacks on Aging

for Aging

1 location in Los Angeles

Sponsor: University of California, Los Angeles

Sex: Female·Age: 55 - 75·Accepts healthy volunteers

Code: NCT06879626·Recruiting·Listed Mar 2025

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Enhanced Recovery After Surgery (ERAS) for Complicated Appendicitis

for Appendicitis Acute

1 location in Los Angeles

Sponsor: Cedars-Sinai Medical Center

Sex: All·Age: 18+

Code: NCT06948071·Recruiting·Listed Apr 2025

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One Up, One Down: Analyzing Patient Preference on Cryotherapy Machine Tubing Placement

for Cryotherapy Tubing Placement

1 location in Orange

Sponsor: Children's Hospital of Orange County

Sex: All·Age: 10 - 18

Code: NCT06772662·Recruiting·Listed Jan 2025

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Prostate Stimulation for Sexual Dysfunction

for Sexual Dysfunction

1 location in Stanford

Sponsor: Stanford University

Sex: Male·Age: 18+

Code: NCT05468931·Recruiting·Listed Jul 2022

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Valacyclovir in Pain Management of Acute Apical Abscesses

for Acute Apical Abscess

Drug: Valacyclovir

1 location in San Francisco

Sponsor: University of California, San Francisco

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

Code: NCT05266040·Phase 2·Recruiting·Listed Mar 2022

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Inhaled Insulin vs Rapid-acting Injections for Post-meal Glucose Control in Women With Gestational Diabetes

for Diabetes, Gestational

Sites in Santa Barbara +4 more locations

Sponsor: Jaeb Center for Health Research

Sex: Female·Age: 18 - 40

Code: NCT06535789·Phase 2, Phase 3·Recruiting·Listed Aug 2024

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Double-S: a Wearable Device for Erectile Dysfunction

for Erectile Dysfunction

1 location in Stanford

Sponsor: Stanford University

Sex: Male·Age: 18+

Code: NCT05451563·Recruiting·Listed Jul 2022

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Adapting Lifestyle Offloading for DFUs

for Diabetic Foot Ulcer

1 location in Los Angeles

Sponsor: University of Southern California

Sex: All·Age: 21+

Code: NCT06278935·Recruiting·Listed Feb 2024

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Telenutrition for Individuals With SCI

for Spinal Cord Injuries

1 location in San Jose

Sponsor: Santa Clara Valley Health & Hospital System

Sex: All·Age: 20+

Code: NCT05468437·Recruiting·Listed Jul 2022

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The Role of Virtual Reality During Regional Anesthesia

for Anxiety

1 location in Los Angeles

Sponsor: Cedars-Sinai Medical Center

Sex: All·Age: 18 - 64·Accepts healthy volunteers

Code: NCT04163809·Recruiting·Listed Nov 2019

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Safety, Tolerability, and Distribution of Laquinimod Eye Drops : The LION Study

for Inflammation

1 location in Palo Alto

Sponsor: Quan Dong Nguyen

Sex: All·Age: 18+

Code: NCT06161415·Phase 1·Recruiting·Listed Dec 2023

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HEalth Advocate for Liver Transplantation: Improving Transition of Care for Adolescent Liver Transplant Recipients

for Liver Transplant

Sites in San Francisco +1 more location

Sponsor: University of California, San Francisco

Sex: All·Age: 18 - 25

Code: NCT06386198·Recruiting·Listed Apr 2024

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Brown Adipose Tissue Activity in Response to Semaglutide Administered to Obese Subjects.

for Obesity

Drug: Semaglutide

1 location in Los Angeles

Sponsor: University of California, Los Angeles

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

Code: NCT05419726·Recruiting·Listed Jun 2022

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The Long COVID-19 Wearable Device Study

for Long COVID

1 location in La Jolla

Sponsor: Scripps Translational Science Institute

Sex: All·Age: 18+

Code: NCT05741112·Recruiting·Listed Feb 2023

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Optimizing PrEP Uptake and Adherence Among Male Sex Workers

for Prevention

Sites in Los Angeles +4 more locations

Sponsor: Brown University

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

Code: NCT05736614·Recruiting·Listed Feb 2023

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Transplantation of Human iPS Cell-derived Dopaminergic Progenitors (CT1-DAP001) for Parkinson's Disease (Phase I/II)

for PD - Parkinson's Disease

1 location in La Jolla

Sponsor: University of California, San Diego

Sex: All·Age: 40 - 75

Code: NCT06482268·Phase 1·Recruiting·Listed Jul 2024

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A Pilot Study of Genetic Testing Uptake Through Enhanced Oncology Nurse-Led Intervention

for Solid Tumor, Adult

1 location in Chico

Sponsor: University of California, Davis

Sex: All·Age: 18+

Code: NCT06436157·Recruiting·Listed May 2024

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Imaging Synapses With [11C] UCB-J in the Human Brain

for Schizophrenia

Sites in Palo Alto & Stanford

Sponsor: Davidzon, Guido, M.D.

Sex: All·Age: 18 - 65·Accepts healthy volunteers

Code: NCT04038840·Phase 1·Recruiting·Listed Jul 2019

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Role of Nutrient Transit in Hyperinsulinemic Hypoglycemia

for Post-Bariatric Hypoglycemia

1 location in Stanford

Sponsor: Stanford University

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

Code: NCT04615546·Recruiting·Listed Nov 2020

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Obesity, Insulin Resistance, and PASC: Persistent SARS-CoV-2

for Long COVID

2 locations in Palo Alto

Sponsor: Stanford University

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

Code: NCT05833217·Recruiting·Listed Apr 2023

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TNBC Gut Microbiota During Neoadjuvant Treatment

for Breast Cancer

1 location in La Jolla

Sponsor: Scripps Health

Sex: All·Age: 18 - 100

Code: NCT06610097·Recruiting·Listed Sep 2024

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Bedside Ultrasound of Gastric Contents in Pediatric Populations

for Gastric Contents

1 location in Stanford

Sponsor: Stanford University

Sex: All·Age: 2 - 60·Accepts healthy volunteers

Code: NCT03520374·Recruiting·Listed May 2018

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Umbilical Vessel Catheterization Under ECG Monitoring and Guidance

for Pediatric ALL

1 location in Palo Alto

Sponsor: Stanford University

Sex: All·Age: 1 Day - 45 Days

Code: NCT03898596·Recruiting·Listed Apr 2019

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Obstetric Placement Study Using EST

for Obstetric Pain

1 location in Palo Alto

Sponsor: Stanford University

Sex: Female·Age: 18+

Code: NCT04109365·Recruiting·Listed Sep 2019

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Erector Spinae Plane Blockade in Pediatric Scoliosis Surgery Patients

for Scoliosis

1 location in Palo Alto

Sponsor: Stanford University

Sex: All·Age: Up to 18

Code: NCT04153994·Recruiting·Listed Nov 2019

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Building Resilience for Surgical Recovery

for Psychosocial Functioning

1 location in San Francisco

Sponsor: The University of Texas Health Science Center, Houston

Sex: All·Age: 65+

Code: NCT06174701·Recruiting·Listed Dec 2023

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Family Mental Health Family Navigator Project (FMHN)

for Mental Health

1 location in San Francisco

Sponsor: University of California, San Francisco

Sex: All·Age: 6 - 17·Accepts healthy volunteers

Code: NCT04822636·Recruiting·Listed Mar 2021

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Emgality for Migraine in Breastmilk

for Migraine

1 location in San Francisco

Sponsor: University of California, San Francisco

Sex: Female·Age: 18 - 45

Code: NCT06085144·Recruiting·Listed Oct 2023

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Testing Tumor Tissue and Blood to Help Select Personalized Treatments for Patients With Suspected Lung Cancers

for NSCLC

Sites in Los Angeles, Orange +19 more locations

Sponsor: Lung Cancer Mutation Consortium

Sex: All·Age: All ages

Code: NCT04712877·Recruiting·Listed Jan 2021

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Beneficial Exposome Study

for Healthy

1 location in Palo Alto

Sponsor: Stanford University

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

Code: NCT06093464·Recruiting·Listed Oct 2023

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Multiomic Diagnostics in Youth With Psychosis

for Psychosis

1 location in San Diego

Sponsor: Rady Pediatric Genomics & Systems Medicine Institute

Sex: All·Age: 7 - 17

Code: NCT05457140·Recruiting·Listed Jul 2022

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