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)
- RecruitingPhase 3
Efficacy and Safety of Trimodulin (BT588) in Subjects With Severe Community-acquired Pneumonia (sCAP)
Biotest
- Location
- Fresno, CA + 3 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
A Study to Evaluate the Safety and Efficacy of Ruxolitinib Cream in Pediatric Participants With Nonsegmental Vitiligo
Incyte Corporation
- Location
- Inglewood, CA + 65 other US sites
- Eligibility basics
- Ages 2–11
- Recruiting
Clinical Trial Evaluating the Safety and Efficacy of Nucleus Pulposus Allograft in Participants With Degenerative Disc Disease
VIVEX Biologics, Inc.
- Location
- Napa, CA + 18 other US sites
- Eligibility basics
- Ages 22–85
- RecruitingPhase 3
A Phase 3 Efficacy and Safety Study of Fosmanogepix for the Treatment of Adult Patients With Invasive Mold Infections.
Basilea Pharmaceutica
- Location
- Duarte, CA + 18 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 1
Dose Escalation Study With Bispecific Antibodies in Adult Participants With Lupus Nephritis
Regeneron Pharmaceuticals
- Location
- San Francisco, CA + 2 other US sites
- Eligibility basics
- Ages 18–60
- RecruitingPhase 2
Study to Assess the Safety and Tolerability of Tafasitamab in Adult Participants With Primary Autoimmune Blood Cell Disorders
Incyte Corporation
- Location
- Los Angeles, CA + 7 other US sites
- Eligibility basics
- Ages 18+
- Recruiting
Starlight Cardiovascular Lifeline Ductus Arteriosus Stent IDE Study
Starlight Cardiovascular Inc
- Location
- Los Angeles, CA + 7 other US sites
- Eligibility basics
- Up to age 6 mo
- RecruitingPhase 3
Study to Evaluate Subcutaneous (SC) VGA039 in Patients With Von Willebrand Disease (VWD)
Vega Therapeutics, Inc
- Location
- Los Angeles, CA + 13 other US sites
- Eligibility basics
- Ages 12–75
- RecruitingPhase 2
Study of the Efficacy and Safety of ICP-332 in Participants With Prurigo Nodularis
Beijing InnoCare Pharma Tech Co., Ltd.
- Location
- Fremont, CA + 13 other US sites
- Eligibility basics
- Ages 18–75
- Recruiting
Investigation of the Delve Detect Cerebrospinal Fluid (CSF) Metagenomic Next-generation Sequencing (mNGS) Test When Used for the Initial Diagnostic Workup of Patients With Suspected Central Nervous System (CNS) Infection
Delve Bio, Inc.
- Location
- San Francisco, CA + 3 other US sites
- Eligibility basics
- Any age listed
- RecruitingPhase 3
A Phase 3 Efficacy and Safety Study of HBS-301 in Participants With Idiopathic Hypersomnia (IH)
Harmony Biosciences Management, Inc.
- Location
- Redwood City, CA + 39 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 2
A Phase 2, Open-Label, Single-Arm Trial of FT819 in Participants With Lupus Nephritis
Fate Therapeutics
- Location
- Beverly Hills, CA + 11 other US sites
- Eligibility basics
- Ages 12–70
- RecruitingPhase 3
Study to Assess KN3835 in the Treatment of Flexible/Semi-Flexible Hammertoe (HMT)
Endo USA Inc., a Keenova Therapeutics Company
- Location
- Corona, CA + 6 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingPhase 1
A Gene Transfer Therapy Study to Evaluate the Safety of and Expression From Delandistrogene Moxeparvovec (SRP-9001) in Participants With Duchenne Muscular Dystrophy (DMD) - Non-Ambulatory Cohort
Sarepta Therapeutics, Inc.
- Location
- La Jolla, CA + 10 other US sites
- Eligibility basics
- Ages 2+ · Men only
- Recruiting
Cephea Early Feasibility Study
Abbott Medical Devices
- Location
- Los Angeles, CA + 19 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 1/Phase 2
CNP-103 in Adolescent and Adult Subjects Ages 12-35 With Recently Diagnosed (Within 6 Months) Stage 3 Type 1 Diabetes (T1D)
COUR Pharmaceutical Development Company, Inc.
- Location
- Newport Beach, CA + 44 other US sites
- Eligibility basics
- Ages 12–35
- Recruiting
Post Market Clinical Study to Evaluate the Performance of the Versius Surgical System
CMR Surgical Ltd
- Location
- Los Angeles, CA + 1 other US site
- Eligibility basics
- Ages 22+
- Recruiting
Tensi+ for Treating Overactive Bladder
Stimuli Technology
- Location
- Beverly Hills, CA + 1 other US site
- Eligibility basics
- Ages 22+
- RecruitingPhase 2
A Research Study Comparing How Well Different Doses of the Medicine NNC0662-0419 Lower Blood Sugar in People With Type 2 Diabetes
Novo Nordisk A/S
- Location
- Lancaster, CA + 19 other US sites
- Eligibility basics
- Ages 18–75
- RecruitingPhase 2
A Phase 2 Study to Evaluate Povetacicept in Adults With Generalized Myasthenia Gravis
Vertex Pharmaceuticals Incorporated
- Location
- Mission Hills, CA + 14 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
AMAZE 3: A Research Study Investigating How Well the Medicine NNC0487-0111 Helps People With Excess Body Weight and Obstructive Sleep Apnoea Not Treated With Positive Airway Pressure Lose Weight and Improve Sleep Apnoea
Novo Nordisk A/S
- Location
- San Diego, CA + 14 other US sites
- Eligibility basics
- Ages 18+
- RecruitingPhase 3
Study to Evaluate the Effectiveness and Safety of Ozanimod Compared to Fingolimod in Children and Adolescents With Relapsing Remitting Multiple Sclerosis
Bristol-Myers Squibb
- Location
- Sacramento, CA + 4 other US sites
- Eligibility basics
- Ages 10–17
- RecruitingPhase 2
Study to Evaluate Efficacy and Safety of ONL1204 in Patients With GA Associated With AMD
ONL Therapeutics
- Location
- Bakersfield, CA + 55 other US sites
- Eligibility basics
- Ages 55+
- RecruitingPhase 3
CardiolRx in Recurrent Pericarditis (MAVERIC Phase-3)
Cardiol Therapeutics Inc.
- Location
- Irvine, CA + 20 other US sites
- Eligibility basics
- Ages 18+