Location · California
Clinical trials recruiting in California
1900 recruiting studies have at least one site in California; 700 accept healthy volunteers. Studies that need a specific condition are included too, so check each listing.
Want the research companies that run paid Phase 1 studies for healthy volunteers? Paid clinical trial companies in California.
1,900 recruiting studiesSource: ClinicalTrials.gov, refreshed October 27, 2026How we list studies
More recruiting studies (pay not posted)
- Recruiting
Remote Electrical Stimulation as a Long-term Intervention for Endometriosis Flare Ups
Samphire Group, Inc.
- Location
- San Francisco, CA
- Eligibility basics
- Ages 22–45 · Women only
- Recruiting
Safety and Usability of the Cionic Neural Sleeve for Parkinson's Disease
Cionic, Inc.
- Location
- Carlsbad, CA + 1 other US site
- Eligibility basics
- Ages 22–75
- Recruiting
PROGRESS: Management of Moderate Aortic Stenosis by Clinical Surveillance or TAVR
Edwards Lifesciences
- Location
- Los Angeles, CA + 49 other US sites
- Eligibility basics
- Ages 65+
- Recruiting
EDX110 Randomized Control Trial for Treatment of DFUs
ConvaTec Inc.
- Location
- Santa Ana, CA + 3 other US sites
- Eligibility basics
- Ages 18–90
- RecruitingPhase 2
A Study to Evaluate Vimseltinib in Adults With Active Chronic Graft-Versus-Host Disease (cGVHD)
Deciphera Pharmaceuticals, LLC
- Location
- Duarte, CA + 25 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 1/Phase 2
A Phase 1/2, Dose-Exploration Study to Evaluate the Safety and Efficacy of BEAM-301 in Patients With Glycogen Storage Disease Type Ia (GSDIa)
Beam Therapeutics Inc.
- Location
- Orange, CA + 2 other US sites
- Eligibility basics
- Ages 18+
- Recruiting
Evaluation of the Patellar LIFT System for Subjects With Patellofemoral Cartilage Degeneration
ZKR Orthopedics Inc
- Location
- La Mesa, CA + 4 other US sites
- Eligibility basics
- Ages 22–65
- RecruitingPhase 1/Phase 2
Treatment of Moderate to Severe Refractory Crohn's Disease
Tr1X, Inc.
- Location
- Sacramento, CA + 12 other US sites
- Eligibility basics
- Ages 18–65
- Recruiting
Melodi Matrix™ in Breast Reconstruction
Melodi Health, Inc.
- Location
- Palo Alto, CA + 9 other US sites
- Eligibility basics
- Ages 22+ · Women only
- RecruitingPhase 2
Safety and Efficacy of ABP-745 in Participants With an Acute Gout Flare
Atom Therapeutics Co., Ltd
- Location
- La Mesa, CA + 10 other US sites
- Eligibility basics
- Ages 18–70
- RecruitingPhase 2
Study of Inebilizumab in Pediatric Subjects With Neuromyelitis Optica Spectrum Disorder
Amgen
- Location
- La Jolla, CA + 3 other US sites
- Eligibility basics
- Ages 2–17
- Recruiting
Evaluating Cryopreserved Osteochondral Allograft Cores for the Treatment of Osteochondral Lesions in the Knee
AlloSource
- Location
- Redwood City, CA + 4 other US sites
- Eligibility basics
- Ages 12–60
- RecruitingPhase 3
A Study to Assess the Safety and Effectiveness of ELAPR002f Injectable Gel in Adult Participants With Atrophic Acne Scars
AbbVie
- Location
- Redondo Beach, CA + 9 other US sites
- Eligibility basics
- Ages 22+
- Recruiting
Trisol System EFS Study
Trisol Medical
- Location
- Los Angeles, CA + 5 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 2
Open-Label Extension Protocol to SNK01-AD01 Study
NKGen Biotech, Inc.
- Location
- Glendale, CA
- Eligibility basics
- Ages 40–85
- RecruitingPhase 2
Study Evaluating INS018_055 Administered Orally to Subjects With Idiopathic Pulmonary Fibrosis
InSilico Medicine Hong Kong Limited
- Location
- Los Angeles, CA + 11 other US sites
- Eligibility basics
- Ages 40+
- RecruitingPhase 2
A Mechanistic Study of MAR001 in Adults With Elevated Triglycerides and Remnant Cholesterol
Marea Therapeutics
- Location
- Chula Vista, CA
- Eligibility basics
- Ages 18–75
- RecruitingPhase 1/Phase 2
A proof-of Concept Study to Assess Safety and Tolerability of HM15421/GC1134A in Patients With Fabry Disease
GC Biopharma Corp
- Location
- Los Angeles, CA + 5 other US sites
- Eligibility basics
- Ages 18+
- Recruiting
Access Cannulation Trial II
Voyager Biomedical
- Location
- Riverside, CA + 7 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
Study to Assess the Efficacy and Safety of NBI-1065845 as an Adjunctive Treatment in Participants With Major Depressive Disorder (MDD)
Neurocrine Biosciences
- Location
- Orange, CA + 12 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
Fontan Udenafil Exercise Longitudinal Assessment Trial - 2
Mezzion Pharma Co. Ltd
- Location
- Los Angeles, CA + 34 other US sites
- Eligibility basics
- Ages 12–18
- Recruiting
Tissue Reinforcement for Breast Reconstruction (TRBR) Pivotal Clinical Study (REDEFINE)
W.L.Gore & Associates
- Location
- Moreno Valley, CA + 15 other US sites
- Eligibility basics
- Ages 22+ · Women only
- Recruiting
NEXUS Aortic Arch Clinical Study to Evaluate Safety and Effectiveness
Endospan Ltd.
- Location
- La Jolla, CA + 23 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
Oral Pyridoxal 5'-Phosphate for the Treatment of Patients With PNPO Deficiency
Medicure
- Location
- Palo Alto, CA + 4 other US sites
- Eligibility basics
- Any age listed