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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.
2713 - 2724 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
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
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Semaglutide and Tirzepatide are advanced GLP-1 medications designed to support weight management and metabolic health. They work by targeting GLP-1 receptors in the body, helping regulate appetite, improve blood sugar control, and support sustainable weight loss (up to 22% of body weight).
Get $50 off your first order using promo code: policy-lab-50
Conditions:
Overweight
Overweight and Obesity
Obesity
Weight Loss
Morbid Obesity
Featured Trial
Birth Control Clinical Research Study
Recruiting
Living with obesity and looking for a birth control option that is right for you? Clinical trials are now enrolling women with a body mass index (BMI) of 30 or more in the area to help study a potential new progestin-only contraceptive patch. Participating in research studies can help advance birth control options. Don’t let financial stress hold you back. All study-related assessments, care, and study patch are available at no cost. You may also be reimbursed for study-related travel.
Conditions:
Obesity
Overweight
Overweight and 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
Comparing Combinations of Drugs to Treat Newly Diagnosed Multiple Myeloma (NDMM) When a Stem Cell Transplant is Not a Medically Suitable Treatment
Recruiting
This phase III trial compares three-drug induction regimens followed by double-or single-drug maintenance therapy for the treatment of newly diagnosed multiple myeloma in patients who are not receiving a stem cell transplant and are considered frail or intermediate-fit based on age, comorbidities, and functional status. Treatment for multiple myeloma includes initial treatment (induction) which is the first treatment a patient receives for cancer followed by ongoing treatment (maintenance) which... Read More
Gender:
ALL
Ages:
All
Trial Updated:
05/29/2025
Locations: Mission Hope Medical Oncology - Arroyo Grande, Arroyo Grande, California
Conditions: Plasma Cell Myeloma
Papaverine in Combination With Chemoradiation for the Treatment of Stage II-III Non-small Cell Lung Cancer
Recruiting
This phase I trial finds out the best dose, possible benefits and/or side effects of papaverine when given together with chemoradiation intreating patients with stage II-III non-small cell lung cancer. Papaverine targets mitochondrial metabolism to decrease the cancer growth process. Giving papaverine with chemoradiation may work best to treat patients with non-small cell lung cancer.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/29/2025
Locations: City of Hope, Duarte, California
Conditions: Locally Advanced Lung Non-Small Cell Carcinoma, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8, Unresectable Lung Non-Small Cell Carcinoma
(Apex) Bezuclastinib in Patients With Advanced Systemic Mastocytosis
Recruiting
This is an open-label, two-part Phase 2 study investigating CGT9486 for the treatment of patients with Advanced Systemic Mastocytosis (AdvSM), including patients with Aggressive SM (ASM), SM with Associated Hematologic Neoplasm (SM-AHN), and Mast Cell Leukemia (MCL).
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/29/2025
Locations: City of Hope Comprehensive Cancer Center, Duarte, California
Conditions: Advanced Systemic Mastocytosis (AdvSM), SM With an Associated Hematologic Neoplasm (SM-AHN), Mast Cell Leukemia (MCL), Aggressive Systemic Mastocytosis (ASM)
Visual Performance of Clareon PanOptix vs. a Comparable Multifocal Intraocular Lens
Recruiting
This is a two-part, multi-center, investigator-initiated clinical study comparing visual outcomes and patient satisfaction in subjects receiving bilateral implantation of either the Clareon PanOptix intraocular lens (IOL) or a comparable multifocal IOL. The study includes a retrospective/prospective pilot phase and a prospective, randomized comparison phase.
Gender:
ALL
Ages:
All
Trial Updated:
05/28/2025
Locations: Wolstan & Goldberg Eye Associates, Torrance, California
Conditions: Age Related Cataracts
A Study of BMS-986490 With or Without Bevacizumab in Advanced Solid Tumors
Recruiting
This is a study of BMS-986490 as a monotherapy and in combination with bevacizumab in participants with select advanced solid tumors known to express CEACAM5.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/28/2025
Locations: USC/Norris Comprehensive Cancer Center, Los Angeles, California
Conditions: Advanced Solid Tumors
Neonatal Platelet Transfusion Threshold Trial
Recruiting
The objective of the NeoPlaTT trial is to test whether, among extremely preterm infants born at 23 0/7 to 26 6/7 weeks' gestation, a lower platelet transfusion threshold, compared to a higher threshold, improves survival without major or severe bleeding up to 40 0/7 weeks' postmenstrual age (PMA).
Gender:
ALL
Ages:
Between 1 hour and 48 hours
Trial Updated:
05/28/2025
Locations: Stanford University, Palo Alto, California
Conditions: Thrombocytopenia, Neonatal, Platelet Transfusion, Infant, Newborn, Diseases, Infant, Extremely Low Birth Weight, Infant, Small for Gestational Age, Thrombosis
Cognitive Status, Fatigue and Inflammation in Patients With Immune Thrombocytopenia (ITP)
Recruiting
This is a multi-center, hospital based, cross-sectional study based on data from patient medical records, including laboratory results. The study will include adult patients with chronic (\> 1 year duration) primary Immune Thrombocytopenia (ITP) only. Patients will be identified based on a laboratory confirmed diagnosis of ITP in the medical records, where there is also a physician-confirmed diagnosis of primary ITP. If patients consent to take part in the study, a routine clinical visit will al... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/28/2025
Locations: USC Norris Comprehensive Cancer Center- Site Number : 8400002, Los Angeles, California
Conditions: Chronic Immune Thrombocytopenia, Primary Immune Thrombocytopenia, Adult Immune Thrombocytopenia
Esprit BTK Post-Approval Study
Recruiting
The Esprit BTK PAS is a prospective, single-arm, multi-center observational study to assess the continued safety and effectiveness of the Esprit™ BTK Everolimus Eluting Resorbable Scaffold System under commercial use, in patients with diseased infrapopliteal lesions causing CLTI (Chronic Limb-Threatening Ischemia) in a real-world setting. The clinical investigation will be conducted at up to 50 sites in the United States (US) and additional sites may be added outside of the US (OUS). Approximate... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/28/2025
Locations: UCSF Fresno, Fresno, California
Conditions: Chronic Limb-Threatening Ischemia
Diagnostic Refinement and Educational Approaches in Managing Bone Marrow Transplantation
Recruiting
This randomized, phase I/II, open-label study will investigate the efficacy and safety of an educational sleep intervention vs standard of care in adults undergoing alloHSCT. The randomization target in this pilot phase is 60 patients.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/28/2025
Locations: Scripps Health, San Diego, California
Conditions: GVHD, Bone Marrow Transplant Complications
Phase 1 Trial of RP-3467 Alone and in Combination With Olaparib in Participants With Advanced Solid Tumors
Recruiting
This is a multicenter, open-label Phase 1 trial to investigate the safety, PK, and pharmacodynamics of the Polθ inhibitor RP-3467 alone or in combination with the poly-ADP ribose polymerase inhibitor (PARPi) olaparib in adults with molecularly selected advanced solid tumors.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/28/2025
Locations: # 1025, The University of California, San Francisco, California
Conditions: Advanced Solid Tumor
Access to Genetic Testing in Underserved Patients With Cancer
Recruiting
This study compares the experiences of people who receive information about genetic testing from a computer-generated character to patients who receive information from a human genetics healthcare provider. Patients with cancer are increasingly recommended for genetic testing as standard of care. Multiple factors contribute to low usage of genetic testing but for many patients the lack of access to genetic counseling and testing is an important and flexible factor. Lack of access is especially r... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/28/2025
Locations: USC / Norris Comprehensive Cancer Center, Los Angeles, California
Conditions: Breast Carcinoma, Male Breast Carcinoma, Malignant Solid Neoplasm, Metastatic Prostate Carcinoma, Ovarian Carcinoma, Pancreatic Exocrine Neoplasm, Stage IVB Prostate Cancer American Joint Committee on Cancer v8, Triple-Negative Breast Carcinoma
A Study of Dostarlimab vs Placebo After Chemoradiation in Adult Participants With Locally Advanced Unresected Head and Neck Squamous Cell Carcinoma
Recruiting
The goal of this study is to assess the safety and effectiveness of Dostarlimab compared to Placebo in adult participants with HNSCC (Head and Neck Squamous Cell Carcinoma)
Gender:
ALL
Ages:
18 years and above
Trial Updated:
05/28/2025
Locations: GSK Investigational Site, Los Angeles, California
Conditions: Neoplasms, Head and Neck
2713 - 2724 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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