Paid Clinical Trials in California

California has 6,400 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 30, 2026.

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5,295 clinical trials

Study of ALTO-101 in Patients With Schizophrenia

for Schizophrenia

Sites in Los Angeles, Orange +11 more locations

Sponsor: Alto Neuroscience

Sex: All·Age: 21 - 55

Code: NCT06502964·Phase 2·Recruiting·Listed Jul 2024

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A Study to Evaluate the Safety and Efficacy of NEXAGON® (Lufepirsen Ophthalmic Gel) in Subjects With PCED

for Persistent Corneal Epithelial Defect

Sites in Torrance, Petaluma +19 more locations

Sponsor: Glaukos Corporation

Sex: All·Age: 2+

Code: NCT05966493·Phase 2·Recruiting·Listed Jul 2023

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Study to Evaluate the Efficacy, Safety, and Tolerability of Efzofitimod in Patients With Systemic Sclerosis (SSc)-Related Interstitial Lung Disease (ILD) (SSc-ILD)

for Interstitial Lung Disease

Sites in Los Angeles, San Diego +13 more locations

Sponsor: aTyr Pharma, Inc.

Sex: All·Age: 18+

Code: NCT05892614·Phase 2·Recruiting·Listed Jun 2023

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Evaluate the Safety of DEXYCU for the Treatment of Inflammation Following Ocular Surgery for Childhood Cataract

for Cataract

Sites in Huntington Beach +7 more locations

Sponsor: EyePoint Pharmaceuticals, Inc.

Sex: All·Age: Up to 3

Code: NCT05191706·Phase 4·Recruiting·Listed Jan 2022

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Open Label, Safety and Efficacy Study of QRX003 Lotion in Subjects With Netherton Syndrome

for Netherton Syndrome

Sites in San Diego +3 more locations

Sponsor: Quoin Pharmaceuticals

Sex: All·Age: 14+

Code: NCT05789056·Phase 2, Phase 3·Recruiting·Listed Mar 2023

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Efficacy and Safety Study of Narsoplimab in Pediatric Patients With High-Risk Hematopoietic Stem Cell Transplant TMA

for Thrombotic Microangiopathies

Sites in San Diego +7 more locations

Sponsor: Omeros Corporation

Sex: All·Age: 28 Days - 17

Code: NCT05855083·Phase 2·Recruiting·Listed May 2023

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A Study to Evaluate the Efficacy of AXS-05 Compared to Bupropion in Preventing the Relapse of Depressive Symptoms

for Major Depressive Disorder

Sites in San Diego, Riverside +38 more locations

Sponsor: Axsome Therapeutics, Inc.

Sex: All·Age: 18 - 65

Code: NCT06223880·Phase 4·Recruiting·Listed Jan 2024

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Pharmacokinetics, Safety, Tolerability of Dolutegravir/Rilpivirine in Pediatrics

for HIV Infections

Sites in Long Beach +6 more locations

Sponsor: ViiV Healthcare

Sex: All·Age: 6 - 12

Code: NCT05674656·Phase 1, Phase 2·Recruiting·Listed Jan 2023

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Safety and Efficacy Trial of HG004 for Leber Congenital Amaurosis Related to Rpe65 Gene Mutations (STAR)

for Leber Congenital Amaurosis

Sites in Sacramento +1 more location

Sponsor: HuidaGene Therapeutics Co., Ltd.

Sex: All·Age: 6 - 50

Code: NCT05906953·Phase 1, Phase 2·Recruiting·Listed Jun 2023

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