Location · California
Clinical trials recruiting in California
1898 recruiting studies have at least one site in California; 701 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.
1,898 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
More recruiting studies (pay not posted)
- RecruitingHealthy volunteers
Comparing Mobile Health Strategies to Improve Pre-exposure Prophylaxis Use (PrEP) for HIV Prevention
Public Health Foundation Enterprises, Inc.
- Location
- San Francisco, CA + 2 other US sites
- Eligibility basics
- Ages 15+
- RecruitingHealthy volunteers
Neurobiologic, Immunologic, and Rheumatologic Markers in Youth With PANS
Stanford University
- Location
- Palo Alto, CA
- Eligibility basics
- Ages 4–18