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California Paid Clinical Trials
A listing of 5602 clinical trials in California actively recruiting volunteers for paid trials and research studies in various therapeutic areas.
1285 - 1296 of 5602
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California is currently home to 5602 active clinical trials, seeking participants for engagement in research studies. These trials take place at a variety of cities in the state, including Los Angeles, San Francisco, San Diego and Sacramento. Whether you're a healthy volunteer interested in paid medical research or someone seeking trials related to a specific condition, the state offers a diverse array of opportunities in your vicinity.
Featured Trial
Healthy Participants Needed (Colonoscopy + Cancer Screening)
Recruiting
Earn $325 - $475 in electronic payment card compensation for your time and effort by participating in a clinical study to develop a blood test that may one day help screen for colon cancer. Take a quick quiz to see if you qualify.
Conditions:
Healthy
Healthy Volunteers
Healthy Subjects
Healthy Volunteer
Healthy Participants
Featured Trial
Paid Clinical Studies Nationwide
Recruiting
Nationwide clinical trials offered in your area. Some trials offering up to several thousand dollars in compensation for participation.
Conditions:
Healthy
Healthy Volunteer Study
Featured Trial
Buy Retatrutide Online Through Celia
Recruiting
Retatrutide (formerly M25) is an investigational peptide being studied for its potential in supporting weight management and metabolic health. It acts on GLP-1, GIP, and glucagon receptors to influence appetite, energy regulation, and fat metabolism.
Conditions:
Healthy
Featured Offer
Find the Best GLP-1 Weight Loss Providers (2025)
Recruiting
Cutting-edge GLP-1 treatments like semaglutide and tirzepatide are helping thousands lose weight with medically guided support. But with so many online providers, how do you know which programs are trusted, affordable, and right for you?
We reviewed the top GLP-1 brands of 2025 — comparing pricing, prescription process, shipping, pharmacy partners, and real user ratings — to help you find a safe, convenient, and effective path toward your weight-loss goals.
- 100% online programs
- Licensed U.S. clinicians
- Fast shipping & flexible payments
See the rankings & choose the GLP-1 provider that fits your life.
We reviewed the top GLP-1 brands of 2025 — comparing pricing, prescription process, shipping, pharmacy partners, and real user ratings — to help you find a safe, convenient, and effective path toward your weight-loss goals.
- 100% online programs
- Licensed U.S. clinicians
- Fast shipping & flexible payments
See the rankings & choose the GLP-1 provider that fits your life.
Conditions:
Overweight
Overweight and Obesity
Obesity
Weight Loss
Morbid Obesity
Featured Trial
Depression Clinical Trial
Recruiting
Join us in researching a potential investigational treatment for Depression. Reimbursement for study-related expenses may be available to you.
Qualifying participants:
•Are between 18-65
•Have been experiencing a major depressive episode for at least a month
Qualifying participants:
•Are between 18-65
•Have been experiencing a major depressive episode for at least a month
Conditions:
Depression
Major Depressive Disorder
Depressive Disorder
Depressive Symptoms
Depressive Disorder
Streamlined Treatment of Pulmonary Exacerbations in Pediatrics
Recruiting
The STOP PEDS RCT is a multicenter, parallel, open label randomized controlled trial evaluating the long-term (one year) and short-term safety and efficacy of two antibiotic treatment strategies for the management of outpatient pulmonary exacerbations (PEx) in the pediatric CF population.
Gender:
ALL
Ages:
Between 3 years and 18 years
Trial Updated:
07/30/2025
Locations: Children's Hospital of Los Angeles & Anton Yelchin Cystic Fibrosis Clinic, Los Angeles, California
Conditions: Cystic Fibrosis
A Study of Remternetug (LY3372993) in Early Alzheimer's Disease (TRAILRUNNER-ALZ 3)
Recruiting
The purpose of this study is to measure the difference in time to developing or worsening memory, thinking, or functional problems due to Alzheimer's disease occurring in participants receiving study drug compared to placebo.
Participation could last up to 255 weeks including screening, a double-blind treatment period, and a double-blind observation period. In addition, eligible participants who receive placebo during the double-blind treatment period may choose to extend their study participat... Read More
Gender:
ALL
Ages:
Between 55 years and 80 years
Trial Updated:
07/30/2025
Locations: Neuro-Pain Medical Center, Fresno, California
Conditions: Alzheimer's Disease
A Study of a Potential Disease Modifying Treatment in Individuals at Risk for or With a Type of Early Onset AD Caused by a Genetic Mutation
Recruiting
The purpose of this research study is to test the study drug, referred to as remternetug, to determine its effectiveness for the study treatment of asymptomatic (at risk) Alzheimer disease in individuals with AD-causing mutations. This study will also investigate the effects of remternetug on biomarkers (measures of the disease including brain scans, blood and spinal fluid tests), examine safety data to identify any potential benefits or risks, and examine how well participants can tolerate remt... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/30/2025
Locations: University of California San Diego Medical Center, La Jolla, California
A Phase 1 Study of Anitocabtagene Autoleucel for the Treatment of Subjects With Non-oncology Plasma Cell-related Diseases
Recruiting
A Phase 1 dose-escalation study designed to evaluate the safety, tolerability, and preliminary efficacy of anito-cel in subjects with generalized myasthenia gravis (GMG). Anitocabtagene autoleucel (anito-cel) is a BCMA-directed CAR-T cell therapy.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/30/2025
Locations: UCLA Medical Center, Los Angeles, California
Conditions: Muscular Diseases, Neuromuscular Manifestations, Autoimmune, Autoimmune Diseases, Autoimmune Diseases of the Nervous System, Myasthenia Gravis, Muscle Weakness
A Randomized, Phase 2/3 Study to Investigate the Efficacy and Safety of RP2 in Combination With Nivolumab in Immune Checkpoint Inhibitor-Naïve Adult Patients With Metastatic Uveal Melanoma
Recruiting
The purpose of this study is to measure the clinical benefits of the combination of RP2 and nivolumab as compared with the combination of nivolumab and ipilimumab in patients with metastatic uveal melanoma who have not been treated with immune checkpoint inhibitor therapy.
Gender:
ALL
Ages:
All
Trial Updated:
07/30/2025
Locations: UC San Diego Moores Cancer Center, La Jolla, California
Conditions: Metastatic Uveal Melanoma
Small Cell Lung Cancer Community Engagement to Eliminate Research Discepancies
Recruiting
This study will evaluate if a direct-to-patient, de-centralized, remote approach will improve clinical research outreach and engagement for patients with SCLC, in the context of a bio-specimen collection study. The study will also assess self-reported preferences and needs of patients with SCLC, regarding choosing and accessing novel therapies in research or standard clinical care settings and supportive gaps in this area, through an initial and 3 month follow up survey.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/30/2025
Locations: Https://Alcmi.Org/Clinical-Trials/Current-Studies/Succeed-Study.Html, Multiple Locations, California
Conditions: Small-cell Lung Cancer
Sapanisertib and Serabelisib (PIKTOR) With Paclitaxel and a Substudy With an Insulin-Suppressing Diet in Patients With Advanced/Recurrent Endometrial Cancer
Recruiting
This is a Phase 2, multicenter, open-label, single-arm study to evaluate the efficacy and safety of sapanisertib and serabelisib (PIKTOR) with paclitaxel in participants with advanced or recurrent endometrial cancer.
Gender:
FEMALE
Ages:
18 years and above
Trial Updated:
07/30/2025
Locations: UC San Diego Moores Cancer Center, La Jolla, California
Conditions: Endometrial Cancer
A Study Evaluating the Real World Experience of Participants Treated With BRIUMVI® (Ublituximab-xiiy) for Relapsing Multiple Sclerosis (RMS)
Recruiting
The purpose of this study is to evaluate safety, effiectiveness, and to gain insight into the treatment experience of participants prescribed BRIUMVI® (ublituximab-xiiy) in the real-world setting
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/30/2025
Locations: TG Therapeutics Investigational Trial Site, Newport Beach, California
Conditions: Relapsing Multiple Sclerosis, Multiple Sclerosis
Prospective Clinical Assessment Study in Children With Hypochondroplasia
Recruiting
This is a long-term, multicenter, non-interventional study of children ages 2.5 to \<17 years with hypochondroplasia (HCH).
Gender:
ALL
Ages:
Between 30 months and 16 years
Trial Updated:
07/30/2025
Locations: UCSF Benioff Children's Hospital, Oakland, California
Conditions: Hypochondroplasia
A Study to Evaluate the Safety and Efficacy of Axatilimab in Combination With Ruxolitinib in Participants With Newly Diagnosed Chronic Graft-Versus-Host Disease
Recruiting
This study will be conducted to determine the preliminary efficacy of axatilimab in combination with ruxolitinib and to assess the contribution of axatilimab to the combination treatment effect in participants with cGVHD.
Gender:
ALL
Ages:
12 years and above
Trial Updated:
07/30/2025
Locations: City of Hope Medical Center, Duarte, California
Conditions: Chronic Graft-versus-host-disease
A Study of Alisertib in Combination With Endocrine Therapy in Patients With HR-positive, HER2-negative Recurrent or Metastatic Breast Cancer
Recruiting
PUMA-ALI-1201 is a randomized, dose optimization, multicenter, Phase 2 study of alisertib administered in combination with endocrine therapy in participants with pathology-confirmed HR-positive/HER2-negative metastatic breast cancer (MBC) following progression on or after at least two prior lines of endocrine therapy in the recurrent or metastatic setting. This study is intended to evaluate the optimal alisertib dose administered in combination with the selected endocrine therapy. The study is a... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
07/30/2025
Locations: MemorialCare Orange Coast Medical Center, Fountain Valley, California
Conditions: Hormone Receptor Positive HER-2 Negative Breast Cancer, Metastatic Breast Cancer, Recurrent Breast Cancer
Effects of Using a Storybook, to Explain Leukemia to Children Versus the Standard Child Life Intervention, on Parental Stress.
Recruiting
The goal of this clinical trial is to measure the effects of using a storybook versus standard child life intervention with parents of children newly diagnosed with leukemia on parental stress.
The main questions it aims to answer are:
* What effect will the storybook have on parent/legal guardian stress at three timepoints: baseline, discharge, and follow up?
* Will this storybook impact parent/legal guardian comfort levels and improve their child's understanding?
Participants will be asked... Read More
Gender:
ALL
Ages:
3 years and above
Trial Updated:
07/30/2025
Locations: Children's Hospital Los Angeles, Los Angeles, California
Conditions: Leukemia
1285 - 1296 of 5602
Kaiser Permanente houses over 6,000 physicians in southern California and it is also one of the largest research centers on the state. On its clinical trial division, Kaiser Permanente conducts clinical trials of almost every specialty funded by pharmaceutical companies, government, and foundations.
The Cedars-Sinai Medical Center located in Los Angeles is one of the largest research centers owned and operated by a private hospital in the United States. Focusing on biomedical, cancer, and heart research among other specialties, you can find almost any type of clinical trials for both health and non-healthy volunteers at the research division of Cedar-Sinai Medical Center.
There are around 100,000 clinical trials happening every year across the United States about almost every condition out there. While most clinical trials are testing drugs or medical devices there are also many behavioral and observational trials going on at any point in time. Many paid research studies are held at these California locations.
Clinical trials are incredibly important for making new medical and scientific discoveries, finding new and better methods for diagnosing medical conditions early, testing new interventions, and even developing safer and more effective surgical procedures.
In order for all these discoveries to me made available to the general population they need to go through years of rigorous testing both in healthy and non-healthy volunteers. During those years, medical professionals follow a protocol that has been previously approved by the FDA or other regulatory agency to test the effectiveness and safety of their discovery.
Other people choose to participate in a clinical trial because they feel it is a good way to contribute to the advancement of medical knowledge and that their participation can help many people in the future. The following lists of trials are broken down by condition, and to find a specific clinical trial in your area click through to clinicaltrials.gov.
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