Clinical trials · California
Cancer clinical trials in California
We’re tracking 1,320 recruiting cancer studies with a site in California — including Phase 1, Phase 1/Phase 2, Phase 2, Phase 3 and Phase 4 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT06467357RecruitingPhase 3
New drug combo for advanced bile duct cancer with HER2
This study tests a new combination of drugs for advanced bile duct cancer that has not been treated yet and shows a protein called HER2. It compares the new combination to the standard treatment to see if it works better or has fewer side effects.
Fullerton, CaliforniaAges 18–99 - NCT06452277RecruitingPhase 3
Testing sevabertinib for advanced HER2-mutated lung cancer
This trial compares a new targeted drug called sevabertinib against standard chemotherapy plus immunotherapy for people with advanced non-small cell lung cancer that has a specific HER2 gene mutation. The goal is to see if sevabertinib works better and is safe.
Newport Beach, CaliforniaAges 18 years+ - NCT06445062RecruitingPhase 1/Phase 2
RAS-targeting drugs for gastrointestinal cancers
This trial tests new drugs that target a specific genetic change (RAS) in gastrointestinal cancers like pancreatic and colorectal cancer. The goal is to see if these drugs can shrink or slow down the cancer.
Los Angeles, CaliforniaAges 18 years+ - NCT06457503RecruitingPhase 4
Toripalimab plus chemo for advanced nasopharyngeal cancer
This trial tests whether adding the immunotherapy drug toripalimab to standard chemotherapy (cisplatin and gemcitabine) can help people whose nasopharyngeal cancer has come back or spread. It is for those who haven't yet received other treatments for this advanced stage.
Irvine, CaliforniaAges 12 years+ - NCT06445114RecruitingPhase 2
Blood-Guided Chemoradiation for HPV-Positive Throat Cancer
This study tests whether a blood test that looks for circulating HPV DNA (ctDNA) can help doctors decide if you need chemotherapy after surgery for HPV-positive throat cancer. After you have surgery to remove the cancer, you receive radiation (possibly with chemotherapy) — the results of the blood test guide whether or not to add chemo.
Beverly Hills, CaliforniaAges 18 years+ - NCT06439836RecruitingPhase 1
Combination immunotherapy for advanced bladder cancer
This trial tests a new drug, CA-4948, combined with pembrolizumab (Keytruda) for people with advanced bladder cancer that grew after prior immunotherapy. The goal is to see if this combination can help when standard treatments stop working.
Duarte, CaliforniaAges 18 years+ - NCT06437574RecruitingPhase 2
Cholesterol-lowering and immune response in prostate cancer
This trial tests whether taking a daily cholesterol-lowering medication (Vytorin or ezetimibe) can boost your immune system to help fight prostate cancer. It is for men with low- or intermediate-risk prostate cancer who are on active surveillance and planning a biopsy.
Los Angeles, CaliforniaAges 18 years+ - NCT06427954Recruiting
Mobile app study for people with advanced lung cancer
This study tests a mobile app (called THRIVE) to help people with advanced lung cancer manage their health and well-being. You'll use the app on your phone to track symptoms and get support, which may help you feel better and stay more in control.
Los Angeles, CaliforniaAges 18 years+ - NCT06427941RecruitingPhase 1/Phase 2
Study of BGB-B2033 with other drugs for advanced solid tumors
This study tests a new drug called BGB-B2033, alone or with other drugs (tislelizumab and bevacizumab), in people with certain advanced cancers. The goal is to see if this combination can shrink tumors or slow their growth, and to check its safety.
Duarte, CaliforniaAges 18 years+ - NCT06435429RecruitingPhase 3
Zanidatamab vs trastuzumab for HER2+ breast cancer
This study compares a new drug called zanidatamab against trastuzumab (Herceptin), both given with a chemotherapy of your doctor's choice. It is for people with HER2-positive breast cancer that has spread and who have already tried T-DXd treatment.
Cerritos, CaliforniaAges 18 years+ - NCT06401421Recruiting
Blood test for tumor DNA after breast cancer chemo
This study tests a new blood test to see if it can find tiny bits of tumor DNA after chemotherapy. If you have a larger or higher-risk breast cancer and are getting chemotherapy before surgery, you may join. The test could help doctors know if your cancer is gone or if more treatment is needed.
Torrance, CaliforniaAges 18 years+ - NCT06380751RecruitingPhase 3
New targeted therapy for BRCA/PALB2-mutated HR+ breast cancer
This trial tests a new combination of targeted therapies (saruparib plus camizestrant or hormone therapy) against standard treatments for people with a specific type of advanced breast cancer. It may be a good option if you have a BRCA1, BRCA2, or PALB2 gene mutation and have not yet had treatment for your advanced disease.
Glendale, CaliforniaAges 18 years+ - NCT06391034RecruitingPhase 2
MRI scan with pyruvate for prostate cancer
This trial uses a special MRI scan (with hyperpolarized pyruvate, a naturally occurring substance) to look at prostate cancer in more detail. It aims to help doctors understand how the cancer is responding to treatment or how it might behave.
San Francisco, CaliforniaAges 18 years+ - NCT06362252RecruitingPhase 1/Phase 2
I-DXd plus atezolizumab for first-line extensive SCLC
This trial tests a new combination of drugs (I-DXd and atezolizumab, with or without carboplatin) as your first treatment for extensive stage small cell lung cancer. It has two groups: one for people who haven't started treatment yet, and another for those who've already had 4 cycles of a standard chemo-immunotherapy combination and are stable or better.
Los Angeles, CaliforniaAges 18 years+ - NCT06350097RecruitingPhase 3
Osimertinib with or without datopotamab deruxtecan for first-line EGFR-mutant lung cancer
This trial tests a combination of two targeted drugs (osimertinib plus datopotamab deruxtecan) against osimertinib alone in patients with a specific type of lung cancer called EGFR-mutant non-small cell lung cancer. It is for people with advanced or recurrent disease who have not yet received systemic treatment.
Santa Monica, CaliforniaAges 18 years+ - NCT06345729RecruitingPhase 3
Combination drug therapy for advanced lung cancer
This trial tests a new pill (calderasib) combined with an immunotherapy drug (pembrolizumab) for people with a specific type of advanced non-small cell lung cancer. It aims to see if the combination can shrink tumors or slow their growth.
Bakersfield, CaliforniaAges 18 years+ - NCT06319027RecruitingPhase 2
Can brain scans help predict glioblastoma progression?
This trial is testing whether certain details on brain scans can help doctors better predict how brain cancer (glioblastoma) will progress. You may be eligible if you are newly diagnosed with this type of cancer and plan to receive standard treatment.
Los Angeles, CaliforniaAges 18 years+ - NCT06319820RecruitingPhase 3
TAR-210 vs standard bladder chemo for FGFR-mutated bladder cancer
This trial compares a new drug, TAR-210, which is placed directly into the bladder, against standard chemotherapy given through a catheter. It is for people with a specific type of bladder cancer that has a change in the FGFR gene.
Los Alamitos, CaliforniaAges 18 years+ - NCT06336902RecruitingPhase 1
Immunotherapy plus fasting diet and vitamin C for KRAS-mutated colorectal cancer
This trial tests a combination of two immunotherapy drugs (botensilimab and balstilimab) plus a fasting-mimicking diet and high-dose vitamin C for people with a specific type of advanced colorectal cancer (KRAS-mutated). It aims to see if this approach can help when standard treatments have stopped working.
Fullerton, CaliforniaAges 18 years+ - NCT06312137RecruitingPhase 3
Pembrolizumab with or without another drug for lung cancer after surgery
This trial tests adding a new drug (sacituzumab tirumotecan) to pembrolizumab for people with non-small cell lung cancer that did not completely disappear after initial treatment and surgery. The goal is to see if the combination works better than pembrolizumab alone.
Beverly Hills, CaliforniaAges 18 years+ - NCT06282575RecruitingPhase 3
Zanidatamab plus chemo for advanced HER2-positive bile duct cancer
This phase 3 trial tests whether adding zanidatamab (a targeted antibody) to standard chemotherapy can improve outcomes for advanced HER2-positive biliary tract cancer. If you have this type of cancer that has spread or can't be removed, and you've had little or no prior treatment, this study might be an option.
Duarte, CaliforniaAges 18 years+ - NCT06276491RecruitingPhase 1
Safety study of an investigational drug for advanced cancer with the CLDN6 marker
This trial tests an investigational drug for people with advanced solid tumors, especially ovarian, fallopian tube, peritoneal, endometrial, or germ cell cancers that have a specific marker called CLDN6. The goal is to see if the drug is safe and tolerable.
Duarte, CaliforniaAges 15 years+ - NCT06283251Recruiting
RISE support program for children with cancer
This study tests a program called RISE that helps families with low income manage the financial and emotional challenges of childhood cancer treatment. It aims to see if the program is feasible and helpful for families like yours.
San Francisco, CaliforniaAges Up to 17 years - NCT06260033RecruitingPhase 2
Radiation Therapy for Oligoprogressive ER+ Breast Cancer
This trial tests whether a precise radiation treatment (SBRT) can target a few growing spots of estrogen receptor-positive breast cancer that has spread to other parts of the body. It also uses a special PET scan (FES PET/CT) to see how well the cancer responds. The goal is to slow down the cancer and delay the need for stronger treatments.
Duarte, 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.
- University of California, San Francisco · 5 studies
- City of Hope · 4 studies
- Cedars-Sinai Medical Center · 3 studies
- Hoag Memorial Hospital Presbyterian · 3 studies
- Research Site · 3 studies
- University of California, Los Angeles · 3 studies
- UC San Diego Moores Cancer Center · 2 studies
- University of California, Irvine · 2 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 1,320 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.