Clinical trials · California
Cancer clinical trials in California
We’re tracking 1,311 recruiting cancer studies with a site in California — including Phase 1, Phase 1/Phase 2, Phase 2, Phase 2/Phase 3 and Phase 3 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT07281417RecruitingPhase 2
Testing adding cemiplimab to chemo before surgery for sinus cancer
This trial tests whether adding the immunotherapy drug cemiplimab to standard chemotherapy before surgery helps treat sinonasal squamous cell carcinoma. The goal is to see if this combination reduces tumors more effectively than chemotherapy alone.
Irvine, CaliforniaAges 18 years+ - NCT04590326RecruitingPhase 1/Phase 2
Study of REGN5668 with or without immunotherapy in ovarian cancer
This Phase 1/2 study tests how safe REGN5668 is and how well it works in adult women with advanced gynecologic cancers. It compares REGN5668 given with cemiplimab alone, or cemiplimab plus fianlimab, and looks for responses in tumors that meet specific criteria.
Duarte, CaliforniaAges 18 years+ - NCT05361720RecruitingPhase 2
Genetic test to match treatment for advanced kidney cancer
This study looks at genetic (RNA) testing of kidney cancer tissue to help choose the best drug treatment. It may help guide therapy for people with advanced or metastatic clear cell kidney cancer who are starting treatment for the first time.
Duarte, CaliforniaAges 18 years+ - NCT07061964RecruitingPhase 2
Immunotherapy and radiation to save the bladder
This trial tests whether combining immunotherapy and low-dose radiation after chemotherapy can help you avoid bladder removal. It's for people whose muscle-invasive bladder cancer has shrunk significantly after initial treatment.
Beverly Hills, CaliforniaAges 18 years+ - NCT06518057RecruitingPhase 2
Sparing memory during brain radiation for leptomeningeal metastases
This trial tests a special type of radiation that avoids the memory center of the brain (the hippocampus) while treating cancer that has spread to the lining of the brain and spinal cord. It may help reduce side effects on thinking and memory for people with breast or lung cancer.
San Francisco, CaliforniaAges 18 years+ - NCT06824467RecruitingPhase 3
Maintenance Therapy Study for Recurrent Ovarian Cancer
This study tests a new maintenance treatment (sacituzumab tirumotecan) versus standard care for people with ovarian cancer that has come back after responding to platinum-based chemotherapy. The goal is to see if it can keep the cancer from growing longer and improve quality of life.
San Francisco, CaliforniaAges 18 years+ - NCT07028853RecruitingPhase 3
New drug combo for advanced prostate cancer
This study tests whether adding the investigational drug mevrometostat to the standard treatment enzalutamide works better than enzalutamide alone for men with prostate cancer that has spread to other parts of the body (metastatic castration-sensitive prostate cancer). You may benefit if you haven't yet received chemotherapy or similar strong treatments for this stage of cancer.
Alhambra, CaliforniaAges 18 years+ - NCT06890338RecruitingPhase 2
Carboplatin and mirvetuximab for advanced ovarian cancer
This trial tests a combination of chemotherapy (carboplatin) and a targeted drug (mirvetuximab soravtansine) given through a vein. It is for people with newly diagnosed advanced ovarian, fallopian tube, or primary peritoneal cancer that has a specific protein called folate receptor alpha (FRα) on at least 75% of tumor cells.
Los Angeles, CaliforniaAges 18 years+ - NCT05519449RecruitingPhase 1
Testing a PSMA-targeting treatment for advanced prostate cancer
This Phase 1 trial tests JANX007 in men with metastatic castration-resistant prostate cancer (cancer that keeps growing despite standard hormone treatment). It aims to find a safe dose and see whether the treatment can shrink tumors or slow progression.
Los Angeles, CaliforniaAges 18–100 - NCT07154290RecruitingPhase 2
Ubamatamab with or without REGN7075 for advanced lung cancer
This trial tests a new targeted therapy (ubamatamab) alone or with another drug (REGN7075) for people with advanced or metastatic non-small cell lung cancer that has gotten worse after standard treatment. It aims to see if targeting MUC16, a substance found on some cancer cells, can help control the cancer.
Irvine, CaliforniaAges 18 years+ - NCT06787612RecruitingPhase 2
New combination for platinum-resistant ovarian cancer
This study tests a new combination treatment (ubamatamab plus another drug) for people with ovarian cancer that no longer responds to platinum chemotherapy. It could be an option if your cancer has kept growing despite prior treatment.
La Jolla, CaliforniaAges 18 years+ - NCT06424327Recruiting
Lung cancer surgery registry
This study collects information from people having surgery to remove a small part of the lung (segmentectomy) for early-stage lung cancer. It helps doctors learn more about this surgery and its outcomes.
San Diego, CaliforniaAges 18 years+ - NCT03723928Recruiting
Blood test–guided monitoring for metastatic breast cancer treatment
This study checks whether specific blood “tumor marker” levels can help monitor how hormone receptor–positive, HER2-negative metastatic breast cancer responds to first-line therapy. It uses regular blood tests (and sometimes scans) to see if this marker-based monitoring is useful and reliable.
Irvine, CaliforniaAges 18 years+ - NCT07127874RecruitingPhase 1
Study of PHN-012 for advanced solid tumors
This trial tests a new drug called PHN-012 for people with advanced colorectal, non-small cell lung, or pancreatic cancer who have already tried at least one standard treatment. The goal is to see if the drug can help shrink or slow tumor growth.
Los Angeles, CaliforniaAges 18 years+ - NCT06042569RecruitingPhase 2
Lower-dose chemo for older women with HER2-negative breast cancer
This trial tests whether a lower dose of two chemotherapy drugs (docetaxel and cyclophosphamide) works well for women 65 and older with early-stage HER2-negative breast cancer. The goal is to maintain effectiveness while reducing side effects in this group.
Duarte, CaliforniaAges 65 years+ - NCT06203600RecruitingPhase 2/Phase 3
Nivolumab plus standard treatment for advanced stomach or esophageal cancer
This trial tests whether adding the immunotherapy drug nivolumab to standard treatment works better for advanced stomach or esophageal cancer. It is for people whose cancer has already progressed after a first round of chemo plus immunotherapy.
Anaheim, CaliforniaAges 18 years+ - NCT06763328RecruitingPhase 3
Metformin for insulin resistance after breast cancer chemo
This study tests if metformin, a common diabetes medicine, can help reduce insulin resistance in women who finished chemotherapy for early-stage breast cancer. It aims to improve long-term health and prevent future problems.
Riverside, CaliforniaAges 18 years+ - NCT06543576RecruitingPhase 1/Phase 2
Radiation and drug therapy for stage IVB cervical cancer
This trial tests combining external and internal radiation with chemotherapy and immunotherapy for stage IVB cervical cancer that has not been treated before. The goal is to see if this approach can help shrink tumors and improve outcomes.
Los Angeles, CaliforniaAges 18 years+ - NCT05786664Recruiting
Breast cancer survivor study collecting your health samples
This study invites women who finished treatment for non-metastatic invasive breast cancer to share health information and biological samples for future research. It may help scientists understand survivorship and improve care after treatment.
Los Angeles, CaliforniaAges 18 years+ - NCT05812807RecruitingPhase 3
Pembrolizumab versus monitoring after triple-negative breast cancer response
This trial checks whether giving pembrolizumab (an immunotherapy) after surgery helps people with triple-negative breast cancer reduce the chance of the cancer coming back, compared with close monitoring only. It’s for patients who had no remaining invasive cancer after neoadjuvant chemotherapy plus pembrolizumab.
Arroyo Grande, CaliforniaAges 18 years+ - NCT06876714RecruitingPhase 3
Shorter vs Longer HER2 Therapy for Breast Cancer with Complete Response
This trial compares 6 months versus 12 months of HER2-targeted therapy for people with HER2+ breast cancer who had a complete response after chemo and trastuzumab. The goal is to see if a shorter treatment is just as effective.
Arroyo Grande, CaliforniaAges 18 years+ - NCT06661720RecruitingPhase 3
Tivozanib and pembrolizumab after kidney cancer surgery
This trial is testing if adding the targeted therapy tivozanib to the immunotherapy drug pembrolizumab (Keytruda) can help prevent kidney cancer from coming back after all known tumors have been removed by surgery.
Auburn, CaliforniaAges 18 years+ - NCT07226544RecruitingPhase 2
Ivonescimab before surgery for high-risk kidney cancer
This trial tests giving the drug ivonescimab before surgery for patients with high-risk clear cell kidney cancer. The goal is to see if it can help shrink the tumor and improve outcomes.
Duarte, CaliforniaAges 18 years+ - NCT07277413RecruitingPhase 1
Study of IDE892 for advanced solid tumors with MTAP deletion
This study tests a new drug called IDE892, alone or in combination, for people with advanced solid tumors that have a specific genetic change (MTAP deletion). The goal is to see if the drug is safe and whether it can shrink tumors.
Santa Rosa, CaliforniaAges 18 years+
Cancer trials by city in California
Where these studies are running in California
Institutions with a site for the recruiting cancer studies listed above.
- City of Hope Comprehensive Cancer Center · 7 studies
- University of California Davis Comprehensive Cancer Center · 7 studies
- USC / Norris Comprehensive Cancer Center · 7 studies
- Cedars-Sinai Medical Center · 6 studies
- Tower Hematology Oncology Medical Group · 5 studies
- City of Hope Orange County Lennar Foundation Cancer Center · 4 studies
- Los Angeles General Medical Center · 4 studies
- UC Irvine Health · 4 studies
What taking part in a cancer study involves
A screening visit first
Before anything else, the study team checks whether you fit — usually a visit with some tests. You can stop at any point, and screening is typically free.
Care at a nearby site
Study visits happen at a clinic or hospital taking part. Many studies cover the cost of the study treatment and related visits, and some reimburse travel.
You stay in control
Taking part is voluntary and you can leave a study at any time, for any reason, without affecting your regular care.
The team decides eligibility
Our fit check is a helpful first read, not a decision. The study team makes the final call after reviewing your health history.
Cancer trials in other states
Common questions
- Are there cancer clinical trials in California?
- Yes. We're currently tracking 1,311 recruiting cancer studies with a site in California, each rewritten in plain language so you can see what it's testing and who it's for.
- How do I find out if I qualify for a cancer study in California?
- Each study lists its eligibility rules — age, diagnosis, prior treatments. On every trial page we explain these in plain language and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Do I have to live in California to take part?
- Not necessarily. These studies have a site in California, but eligibility is about your health, not your address — some people travel to take part, and a few studies reimburse travel. The study team can tell you what's required.
- Does it cost anything to join a cancer trial?
- Using Clin2 is always free. Many trials cover the study treatment and related visits; some reimburse travel. The study team explains exactly what's covered before you decide.
Not the right time?
New cancer studies open in California regularly. Set up a health profile and we’ll quietly watch for studies that fit you and email you when one opens.
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.