Search
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.
529 - 540 of 5602
Match to Clinical Trials
Access to cutting-edge treatments
Latest clinical trials
Find trials in your area
Search by Name
Filter by Condition
Filter by Location
Filter by Age
Filter by Type
Gender
Type of Study
Clinical Trial Phase
Popular Cities
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
Lose Weight with GLP-1 Medications
Recruiting
Policy Lab has partnered with OnlineSemaglutide.org to offer trusted access to semaglutide and other GLP-1 medications, including generic alternatives to Ozempic® and Wegovy®.
GLP-1 medications are scientifically backed to help individuals achieve significant weight loss—on average, 15-20% of body weight within a year.
As a valued user, you’re eligible for $50 off your first program with code policy-lab-50.
GLP-1 medications are scientifically backed to help individuals achieve significant weight loss—on average, 15-20% of body weight within a year.
As a valued user, you’re eligible for $50 off your first program with code policy-lab-50.
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
Pan Tumor Rollover Study
Recruiting
Main Objective of this study is to examine long-term safety of nivolumab monotherapy including combinations and other cancer therapies in various tumor types.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/14/2025
Locations: Innovative Clinical Research Institute, Lynwood, California
Conditions: Cancer
Radiation Therapy With or Without Cisplatin in Treating Patients With Stage III-IVA Squamous Cell Carcinoma of the Head and Neck Who Have Undergone Surgery
Recruiting
This phase II trial studies how well radiation therapy with or without cisplatin works in treating patients with stage III-IVA squamous cell carcinoma of the head and neck who have undergone surgery. Radiation therapy uses high energy x-rays to kill tumor cells and shrink tumors. Drugs used in chemotherapy, such as cisplatin, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. It is not yet kno... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/14/2025
Locations: Mission Hope Medical Oncology - Arroyo Grande, Arroyo Grande, California
Conditions: Head and Neck Squamous Cell Carcinoma, Hypopharyngeal Squamous Cell Carcinoma, Laryngeal Squamous Cell Carcinoma, Laryngeal Squamous Cell Carcinoma, Spindle Cell Variant, Lip and Oral Cavity Squamous Cell Carcinoma, p16INK4a Negative Oropharyngeal Squamous Cell Carcinoma, Stage III Hypopharyngeal Carcinoma AJCC v8, Stage III Laryngeal Cancer AJCC v8, Stage III Lip and Oral Cavity Cancer AJCC v8, Stage III Oral Cavity Verrucous Carcinoma, Stage III Oropharyngeal (p16-Negative) Carcinoma AJCC v8, Stage IVA Hypopharyngeal Carcinoma AJCC v8, Stage IVA Laryngeal Cancer AJCC v8, Stage IVA Lip and Oral Cavity Cancer AJCC v8, Stage IVA Oral Cavity Verrucous Carcinoma, Stage IVA Oropharyngeal (p16-Negative) Carcinoma AJCC v8
Study to Evaluate the Efficacy and Safety of Deuruxolitinib in Adolescents With Severe Alopecia Areata
Recruiting
This study evaluates the safety and effectiveness of deuruxolitinib in adolescents aged 12 to less than 18 years who have 50% or greater scalp hair loss.
Gender:
ALL
Ages:
Between 12 years and 17 years
Trial Updated:
08/13/2025
Locations: Dermatology Research Associates, Los Angeles, California
Conditions: Alopecia Areata
Closed-Loop Deep Brain Stimulation for Treatment-Resistant Bipolar Depression
Recruiting
Neurons are specialized types of cells that are responsible for carrying out the functions of the brain. Neurons communicate with electrical signals. In diseases such as major depression this electrical communication can go awry. One way to change brain function is using electrical stimulation to help alter the communication between groups of neurons in the brain.
The purpose of this study is to test a personalized approach to brain stimulation as an intervention for bipolar depression The stud... Read More
Gender:
ALL
Ages:
Between 22 years and 70 years
Trial Updated:
08/13/2025
Locations: University of California, San Francisco, San Francisco, California
Conditions: Bipolar II Disorder, Bipolar II Disorder, Most Recent Episode Major Depressive
Aromatherapy Essential Oils to Manage Anxiety and Nausea in Cancer Patients Receiving Infusion in the Ambulatory Setting
Recruiting
This clinical trial tests how well aromatherapy essential oils work to manage anxiety and nausea in cancer patients receiving infusions in the ambulatory setting. Current drugs that are given for nausea may cause constipation and fatigue. Therefore, there is interest in exploring complementary therapies, like aromatherapy, that do not carry the same side effects. Using aromatherapy essential oils such as ginger, peppermint, and lavender, may help reduce nausea and anxiety. Some studies have show... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: City of Hope Medical Center, Duarte, California
Conditions: Hematopoietic and Lymphatic System Neoplasm, Malignant Solid Neoplasm
A Study of Vosoritide Versus Placebo in Children With Hypochondroplasia Aged 0 to < 36 Months
Recruiting
The purpose of this study is to evaluate the safety and efficacy of daily administration of vosoritide in participants with HCH aged 0 to \< 36 months over a 52-week period.
Gender:
ALL
Ages:
Between 0 months and 36 months
Trial Updated:
08/13/2025
Locations: Cedars-Sinai Medical Center, Los Angeles, California
Conditions: Hypochondroplasia
A Study to Examine Anktiva for the Treatment of COVID-19.
Recruiting
This study will examine the safety and effectiveness of Anktiva in treating patients with Long COVID-19 which is defined as persistent symptoms of a COVID-19 infection that remain after the infection is over.
Gender:
ALL
Ages:
Between 18 years and 70 years
Trial Updated:
08/13/2025
Locations: Chan Soon-Schiong Institute for Medicine (CSSIFM), El Segundo, California
Conditions: Long COVID, Long COVID Syndrome, Long Covid 19
Maridebart Cafraglutide in Heart Failure With Preserved or Mildly Reduced Ejection Fraction and Obesity
Recruiting
This study will examine if maridebart cafraglutide as an adjunct to standard of care will lead to a reduction in heart failure (HF) events such as HF hospitalizations and urgent HF visits, cardiovascular (CV) deaths and improvement in HF symptoms in participants with HF with preserved ejection fraction (HFpEF) and HF with mildly reduced ejection fraction (HFmrEF) who are obese. This is a phase 3, global, multicenter, 2-part study with a double-blind period and an open-label extension (OLE). The... Read More
Gender:
ALL
Ages:
Between 18 years and 99 years
Trial Updated:
08/13/2025
Locations: National Heart Institute, Beverly Hills, California
Conditions: Heart Failure With Preserved Ejection Fraction, Heart Failure With Mildly Reduced Ejection Fraction, Obesity
Evaluating the Impact of Maridebart Cafraglutide on Cardiovascular Outcomes in Participants With Atherosclerotic Cardiovascular Disease and Overweight or Obesity
Recruiting
The primary objective of this trial is to demonstrate that maridebart cafraglutide is superior to placebo when given as an adjunct to standard of care with respect to reducing cardiovascular (CV) morbidity and mortality.
Gender:
ALL
Ages:
Between 45 years and 99 years
Trial Updated:
08/13/2025
Locations: Velocity Clinical Research- Huntington Park, Huntington Park, California
Conditions: Atherosclerotic Cardiovascular Disease, Overweight, Obesity
Real-world Experience on Using Nemolizumab in the Treatment of Moderate-to- Severe Prurigo Nodularis in Adults
Recruiting
The main aim of this study is to assess real-world effectiveness of nemolizumab in Prurigo nodularis (PN) as measured by investigator and patient reported outcome (PRO) in clinical practice at Month 6.
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: Galderma Investigational Site # 7074, Corona, California
Conditions: Prurigo Nodularis
A Phase 2, Open-Label Study of DISC-3405 in Participants With Polycythemia Vera (PV)
Recruiting
This open-label, multicenter, within-participant dose escalation study examining up to 2 dose levels of DISC-3405 will assess the safety, tolerability, efficacy, pharmacokinetics, and pharmacodynamics of DISC-3405 in participants with polycythemia vera (PV).
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: UCLA Health, Los Angeles, California
Conditions: Polycythemia Vera (PV)
A Clinical Study of V940 and Pembrolizumab (MK-3475) in People With Melanoma (V940-012/INTerpath-012)
Recruiting
Researchers want to learn if V940 with pembrolizumab can stop advanced melanoma from growing or spreading. Melanoma is a type of skin cancer. Advanced means the cancer has spread to other parts of the body and cannot be removed with surgery. A standard (or usual) treatment for advanced melanoma is immunotherapy. Immunotherapy is a treatment that helps the immune system fight cancer. V940 is a study treatment designed to help a person's immune system attack their specific cancer. Pembrolizumab is... Read More
Gender:
ALL
Ages:
18 years and above
Trial Updated:
08/13/2025
Locations: UCSF Medical Center at Mission Bay ( Site 4044), San Francisco, California
Conditions: Malignant Melanoma
529 - 540 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.
Search Clinical Trials in California by Condition
See All Conditions