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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.
853 - 864 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
Inotuzumab Ozogamicin in Treating Younger Patients With B-Lymphoblastic Lymphoma or Relapsed or Refractory CD22 Positive B Acute Lymphoblastic Leukemia
Recruiting
This phase II trial studies how well inotuzumab ozogamicin works in treating younger patients with B-lymphoblastic lymphoma or CD22 positive B acute lymphoblastic leukemia that has come back (relapsed) or does not respond to treatment (refractory). Inotuzumab ozogamicin is a monoclonal antibody, called inotuzumab, linked to a toxic agent called ozogamicin. Inotuzumab attaches to CD22 positive cancer cells in a targeted way and delivers ozogamicin to kill them.
Gender:
ALL
Ages:
Between 1 year and 21 years
Trial Updated:
08/08/2025
Locations: Kaiser Permanente Downey Medical Center, Downey, California
Conditions: Recurrent B Acute Lymphoblastic Leukemia, Recurrent B Lymphoblastic Lymphoma, Refractory B Acute Lymphoblastic Leukemia, Refractory B Lymphoblastic Lymphoma
BBD Longitudinal Study of Osteogenesis Imperfecta
Recruiting
Osteogenesis Imperfecta (OI) is a rare disorder of increased bone fragility characterized by fractures with minimal or absent trauma, dentinogenesis imperfecta (DI), and, in adult years, hearing loss. It is seen in both genders and all races. The clinical features of OI represent a continuum varying from perinatal lethality to individuals with severe skeletal deformities, mobility impairments, and very short stature to nearly asymptomatic individuals with a mild predisposition to fractures, norm... Read More
Gender:
ALL
Ages:
All
Trial Updated:
08/08/2025
Locations: University of California Los Angeles, Los Angeles, California
Conditions: Osteogenesis Imperfecta
Project: Every Child for Younger Patients With Cancer
Recruiting
This study gathers health information for the Project: Every Child for younger patients with cancer. Gathering health information over time from younger patients with cancer may help doctors find better methods of treatment and on-going care.
Gender:
ALL
Ages:
25 years and below
Trial Updated:
08/08/2025
Locations: Kaiser Permanente Downey Medical Center, Downey, California
Conditions: Central Nervous System Neoplasm, Childhood Immature Teratoma, Childhood Langerhans Cell Histiocytosis, Childhood Mature Teratoma, Congenital Mesoblastic Nephroma, Lymphoproliferative Disorder, Myeloproliferative Neoplasm, Stromal Neoplasm, Carcinoma In Situ, Malignant Solid Neoplasm, Desmoid Fibromatosis, Ganglioneuroma, Melanocytic Neoplasm, Neuroendocrine Neoplasm, Adrenal Gland Pheochromocytoma, Malignant Neoplasm, Neoplasm of Uncertain Malignant Potential, Childhood Kidney Neoplasm
A Long-Term Follow-Up Observational Study to Evaluate Safety in Subjects Who Have Received a Gene-Modified Regulatory T Cell (Treg) Therapeutic
Recruiting
To assess the emergence, type, severity, and potential causality of delayed adverse events following administration of a gene-modified Treg therapeutic.
Gender:
ALL
Ages:
Between 18 years and 71 years
Trial Updated:
08/07/2025
Locations: UCSF Medical Center, San Francisco, California
Conditions: Rheumatoid Arthritis (RA), Hidradenitis Suppurativa (HS)
Matrion Decellularized Placental Membrane Versus Conventional Wound Management in Subjects With Diabetic Foot Ulcers
Recruiting
This study will evaluate Matrion™ (LifeNet Health, Inc., Virginia Beach, VA), a placental membrane product, as a treatment for diabetic foot ulcers compared to conventional wound care. Matrion is derived from donated human birth tissue and includes both the amniotic and chorionic layers, along with the trophoblast layer. It is minimally processed using a proprietary decellularization method and terminally sterilized to ensure the membrane is acellular and sterile, making it suitable for surgical... Read More
Gender:
ALL
Ages:
Between 21 years and 80 years
Trial Updated:
08/07/2025
Locations: Limb Preservaion Platform, Inc., Fresno, California
Conditions: Diabetic Foot Ulcer (DFU), Lower Extremity
Study to Access the Efficacy and Safety of IMVT-1402 in Participants With Mild to Severe Generalized Myasthenia Gravis
Recruiting
This is a 26-week study to assess the efficacy, safety and tolerability of IMVT-1402 in adult participants with mild to severe generalized myasthenia gravis.
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
08/07/2025
Locations: Site Number - 1010, Carlsbad, California
Conditions: Generalized Myasthenia Gravis
A Study to Learn About the Study Medicine Ibuzatrelvir in Adults With COVID-19 Who Are Severely Immunocompromised
Recruiting
This is a Phase 3, randomized, actively controlled, double-blinded, double-dummy, superiority study to evaluate the efficacy and safety of ibuzatrelvir alone and in combination with remdesivir IV compared to remdesivir IV alone for the treatment of symptomatic COVID-19 in severely immunocompromised adult participants who are non-hospitalized or are hospitalized for observation but do not require supplemental oxygen for COVID-19.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/07/2025
Locations: Hope Clinical Research, Inc., Canoga Park, California
Conditions: COVID-19 Infection
A Study of IPN10200 for the Treatment of Cervical Dystonia in Adults
Recruiting
The purpose of this study is to evaluate the efficacy and safety of the study drug, IPN10200, and to assess how well it works when compared with placebo in treating Cervical Dystonia (CD) in adults.
CD can cause a series of abnormalities and symptoms in the head and neck that can lead to neck pain and stiffness, and headaches. CD is believed to involve deep parts within the brain that control movement, but genetic factors, environmental factors, and abnormalities in the brain may also play a ro... Read More
Gender:
ALL
Ages:
Between 18 years and 80 years
Trial Updated:
08/07/2025
Locations: Parkinson's & Mvmt Disorders Inst, Fountain Valley, California
Conditions: Cervical Dystonia
A Study to Evaluate Tobevibart + Elebsiran in Chronic HDV Infection
Recruiting
This is a multicenter, open label, randomized Phase 3 clinical study to evaluate the efficacy and safety of the combination of tobevibart + elebsiran for the treatment of chronic hepatitis delta in comparison to delayed treatment.
Gender:
ALL
Ages:
Between 18 years and 70 years
Trial Updated:
08/07/2025
Locations: Investigative Site, Redwood City, California
Conditions: Viral Hepatitis
A Study of JNJ-95475939 in the Treatment of Participants With Moderate to Severe Atopic Dermatitis (AD)
Recruiting
The purpose of this study is to evaluate how well JNJ-95475939 works as compared to placebo in participants with moderate to severe atopic dermatitis.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/07/2025
Locations: First OC Dermatology, Fountain Valley, California
Conditions: Dermatitis, Atopic
A Study to Identify an Optimal Dose of QCZ484 in Mild to Moderate Hypertensive Patients
Recruiting
The purpose of this study is to evaluate the efficacy, safety and tolerability of QCZ484 or placebo, given subcutaneously, every 6 months, at different dose levels in patients with mild to moderate hypertension
Gender:
ALL
Ages:
Between 18 years and 75 years
Trial Updated:
08/07/2025
Locations: NICRs Research Center, Garden Grove, California
Conditions: Hypertension
A Study to Investigate the Effect of Hepatic Impairment on the Pharmacokinetics, Safety, and Tolerability of AZD2389
Recruiting
The purpose of this study is to examine the safety and tolerability of AZD2389 in participants with hepatic impairment and participants with normal hepatic function.
Gender:
ALL
Ages:
Between 18 years and 85 years
Trial Updated:
08/07/2025
Locations: Research Site, Rialto, California
Conditions: Hepatic Impairment
853 - 864 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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