Clinical trials · California
Oncology clinical trials in California
We’re tracking 136 recruiting oncology 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
- 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+ - NCT06877884Recruiting
Cancer care data collection registry
This trial gathers information from your routine cancer care to help researchers learn more about real-world treatments and outcomes. No extra tests or procedures are required.
Monterey, CaliforniaAges 18–120 - NCT06859801Recruiting
Bone pain study combining ablation and radiation
This study looks at combining two treatments for painful bone tumors that have spread from other cancers. It tests if using both treatments together provides better pain relief than either alone.
San Diego, CaliforniaAges 21 years+ - NCT06805305RecruitingPhase 2
Immunotherapy for newly diagnosed glioblastoma
This trial tests a new personalized immunotherapy (DOC1021) for people with newly diagnosed glioblastoma. The treatment uses your own immune cells to attack the tumor and is given after surgery and with standard chemotherapy and radiation.
Newport Beach, CaliforniaAges 18 years+ - NCT06795412RecruitingPhase 1/Phase 2
PYX-201 plus pembrolizumab for advanced solid tumors
This trial tests a new drug called PYX-201 combined with an immunotherapy (pembrolizumab) for people with advanced solid tumors that have not responded to standard treatments. The goal is to see if this combination can shrink tumors and help people live longer with manageable side effects.
Santa Monica, CaliforniaAges 18 years+ - NCT05237258Recruiting
Compare palliative care approaches for people with high-risk AML
This study tests a specialized (targeted) palliative care program versus usual oncology care for people hospitalized with high-risk acute myeloid leukemia (AML). The goal is to see if this palliative approach improves comfort, support, and care planning during intensive treatment.
Stanford, CaliforniaAges 18–120 - NCT06748222RecruitingPhase 3
Online mindfulness program for breast cancer survivors
This trial tests a 6-week online mindfulness program to help breast cancer survivors manage mild to moderate depression. You may qualify if you finished active treatment within the last 5 years and can use a digital device.
Vacaville, CaliforniaAges 18–50 - NCT06724237RecruitingPhase 3
High-dose chemo and stem cell transplant for T-cell lymphoma patients in remission
This trial tests whether high-dose chemotherapy followed by a stem cell transplant using your own cells can help people with certain types of peripheral T-cell lymphoma live longer. You would qualify if you have already finished your first round of chemotherapy and are in complete remission.
Walnut Creek, CaliforniaAges 18–75 - NCT06657144RecruitingPhase 1
Study of CHS-114 and toripalimab for advanced solid tumors
This study tests a new drug combo (CHS-114 + toripalimab) for people with advanced solid tumors like stomach, esophageal, or colorectal cancer that have already been treated. It aims to see if adding these drugs can help control the cancer better.
Duarte, 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.
San Francisco, CaliforniaAges 18 years+ - NCT06647953RecruitingPhase 3
Testing a standard approach for pleuropulmonary blastoma, with or without topotecan
This trial compares a standard surgery and chemotherapy plan for type I pleuropulmonary blastoma (PPB) to adding the drug topotecan for types II and III PPB. The goal is to see if the extra drug helps shrink tumors and improve outcomes for children with more advanced disease.
Downey, CaliforniaAges Up to 21 years - NCT06655246RecruitingPhase 1
Ziftomenib and imatinib for advanced GIST
This trial tests a new drug, ziftomenib, combined with imatinib for people with advanced or spreading gastrointestinal stromal tumors (GIST) that have a KIT mutation. It may help if your GIST has gotten worse while on imatinib.
Palo Alto, CaliforniaAges 18 years+ - NCT06632977RecruitingPhase 2
Matching targeted treatments to your prostate cancer's genetics
This trial is testing whether matching your cancer's specific genetic changes to a targeted treatment can help control metastatic prostate cancer that has stopped responding to standard hormone therapy and chemotherapy. You may receive a drug, a radioactive treatment, or a combination based on your tumor's molecular profile.
Chico, CaliforniaAges 18 years+ - NCT06625775RecruitingPhase 1
Study of BBO-10203 for advanced solid tumors
This trial tests a new drug called BBO-10203, alone or combined with other cancer treatments, for people with certain advanced breast, colorectal, or lung cancers. It aims to see if the drug is safe and effective.
Duarte, CaliforniaAges 18 years+ - NCT06626919RecruitingPhase 1
A cell therapy trial for generalized myasthenia gravis
This trial tests a new cell therapy called anitocabtagene autoleucel (anito-cel) for people with generalized myasthenia gravis (gMG) that is not well controlled with current treatments. The goal is to see if it can reduce symptoms and improve quality of life.
Palo Alto, CaliforniaAges 18 years+ - NCT06588478RecruitingPhase 2
Study of pirtobrutinib for CLL or SLL
This trial tests a new drug called pirtobrutinib for people with chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL). It is for those whose cancer has come back or not responded to treatment, including a prior BTK inhibitor, and also for those who have never been treated but have a specific genetic change (17p deletion).
Palo Alto, CaliforniaAges 18 years+ - NCT06567743RecruitingPhase 2
Study of a new virus therapy for high-risk bladder cancer
This trial tests a new virus-based medicine, cretostimogene grenadenorepvec, given directly into the bladder for people with high-risk non-muscle-invasive bladder cancer. It may help prevent the cancer from coming back, especially for those who have not had BCG treatment or whose cancer did not respond to BCG.
Irvine, CaliforniaAges 18 years+ - NCT06580314RecruitingPhase 3
Olaparib with or without bevacizumab for ovarian cancer
This trial tests whether taking the drug olaparib for one or two years, alone or with another drug called bevacizumab, can help keep ovarian cancer from coming back after initial chemotherapy and surgery. It is for people with certain genetic markers in their tumor.
San Francisco, CaliforniaAges 18 years+ - NCT06532279RecruitingPhase 2
Testing BMX-001 with chemoradiation for head and neck cancer
This trial tests whether adding BMX-001 (a drug that may protect healthy tissues) to standard chemoradiation can reduce side effects and improve outcomes for people with head and neck cancer. It's a randomized study, so you would have a 50/50 chance of getting BMX-001 or a placebo.
Encinitas, CaliforniaAges 18 years+ - NCT06513962RecruitingPhase 3
Triptorelin to protect ovaries in young women with cancer
This study tests whether a medicine called triptorelin can protect the ovaries in young women and teens receiving strong chemotherapy for cancer. If you are newly diagnosed with a cancer (other than breast cancer) and are about to get certain chemotherapy drugs, this trial may help preserve your fertility.
Los Angeles, CaliforniaAges Up to 39 years - NCT06500481RecruitingPhase 3
Proton vs standard radiation for cancer spread to brain/spine lining
This trial compares a newer type of radiation (proton therapy) to standard radiation for people whose breast or lung cancer has spread to the lining of the brain and spinal cord. It aims to see if proton therapy can better control the disease while causing fewer side effects.
San Diego, 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+ - NCT05055609RecruitingPhase 1
Study drug TRE-515 for advanced solid tumors using PET scans
This Phase 1 trial tests how safe TRE-515 is, what dose can be used, and how the drug moves through the body, including using PET scans. It’s for adults with advanced solid cancers that have stopped responding to standard treatment.
Santa Monica, CaliforniaAges 18 years+ - NCT06410209RecruitingPhase 2
Walking Juntos: Smartphone program to help Hispanic cancer survivors be active
This study will test if a smartphone program and social media group can help Hispanic/Latino teens and young adults who had childhood cancer become more physically active. You would wear a Fitbit and use a phone app with culturally tailored tips and support.
Downey, CaliforniaAges 15–20
Oncology trials by city in California
Where these studies are running in California
Institutions with a site for the recruiting oncology studies listed above.
- City of Hope · 8 studies
- UC San Diego Moores Cancer Center · 8 studies
- UC San Diego Health · 7 studies
- Kaiser Permanente-Oakland · 6 studies
- UC Irvine Health/Chao Family Comprehensive Cancer Center · 5 studies
- UCI Health - Chao Family Comprehensive Cancer Center and Ambulatory Care · 5 studies
- Enloe Medical Center · 3 studies
- Kaiser Permanente Downtown Commons · 3 studies
What taking part in a oncology 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.
Oncology trials in other states
Common questions
- Are there oncology clinical trials in California?
- Yes. We're currently tracking 136 recruiting oncology 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 oncology 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 oncology 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 oncology 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.