Clinical trials · California
Colorectal Cancer Screening clinical trials in California
We’re tracking 50 recruiting colorectal cancer screening studies with a site in California — including Phase 1, Phase 1/Phase 2, Phase 2 and Phase 3 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT03526835RecruitingPhase 1/Phase 2
Study of MCLA-158 for advanced solid tumors
This trial tests a new experimental drug called MCLA-158 (petosemtamab) for people with advanced solid tumors, especially head and neck cancer or colorectal cancer, that have not responded to standard treatments. The study aims to see if this drug can shrink tumors or slow their growth.
La Jolla, CaliforniaAges 18 years+ - NCT06662786RecruitingPhase 3
Amivantamab plus chemo vs. standard chemo for left-sided colorectal cancer
This trial compares a new combination (amivantamab plus chemotherapy) with the standard treatment (cetuximab plus chemotherapy) as the first therapy for people with left-sided colorectal cancer that has spread. The goal is to see which approach works better when the tumor has no mutations in the KRAS, NRAS, or BRAF genes.
Bakersfield, CaliforniaAges 18 years+ - NCT05253651RecruitingPhase 3
Tucatinib plus trastuzumab with chemo for HER2+ metastatic colon cancer
This trial tests whether adding tucatinib and trastuzumab to standard chemotherapy works better than standard treatment alone for people with HER2-positive metastatic colon or rectal cancer. It aims to improve how long people live and how well tumors respond as first treatment for advanced disease.
Anaheim, CaliforniaAges 18 years+ - NCT06428409RecruitingPhase 1/Phase 2
A study of MK-2870 for several gastrointestinal cancers
This trial is testing a new drug called MK-2870, alone or with other treatments, for people with advanced colorectal, pancreatic, or bile duct cancer. It aims to see if the drug can help shrink or control the cancer.
Los Angeles, CaliforniaAges 18 years+ - NCT05176483RecruitingPhase 1
Zanzalintinib with immunotherapy for advanced solid tumors
This Phase 1 study tests zanzalintinib (a targeted medicine) combined with immunotherapy medicines in people with advanced solid cancers that can’t be removed by surgery. It aims to see if the combination can control the cancer and determine the safest dose.
Palo Alto, CaliforniaAges 18 years+ - NCT06789172RecruitingPhase 1
New drug OKN4395 with or without pembrolizumab for solid tumors
This trial tests a new oral drug called OKN4395, which targets a COX2-related immune pathway, alone or with the immunotherapy pembrolizumab, in people with advanced solid tumors. It may be an option if you have certain types of cancer that have stopped responding to other treatments.
Santa Monica, CaliforniaAges 18 years+ - NCT06995898Recruiting
A new way to screen for cancer
This study tests a new blood test to find cancer early. You will give blood samples and let researchers look at your medical records for one year.
Pleasanton, CaliforniaAges 45–75 - NCT07595874RecruitingPhase 2
New Immunotherapy Drugs Before Surgery for Advanced Colorectal Cancer
This trial tests two immunotherapy drugs (botensilimab and balstilimab) given before surgery to treat advanced colorectal cancer that can be removed. The goal is to help the immune system fight cancer cells and improve outcomes after surgery.
Corona, CaliforniaAges 18 years+ - NCT07094204RecruitingPhase 1
A study of ASP5834 for adults with solid tumors and KRAS mutations
This trial is testing a new drug called ASP5834 for people with advanced solid tumors that have a specific change in the KRAS gene. The study will find the best dose and see if it helps shrink tumors.
Santa Monica, CaliforniaAges 18 years+ - NCT06750094RecruitingPhase 3
Study of amivantamab plus FOLFIRI in colorectal cancer
This trial tests adding amivantamab to standard FOLFIRI chemotherapy for people with certain types of colorectal cancer that have already been treated once. It aims to see if this combination works better than another common treatment (cetuximab or bevacizumab plus FOLFIRI).
Bakersfield, CaliforniaAges 18 years+ - NCT06542835Recruiting
Telehealth support for colorectal cancer screening
This study tests whether telehealth support can help people get recommended colorectal cancer screening. It may be a good fit if you haven't been screened recently and are willing to use your phone for health guidance.
Los Angeles, CaliforniaAges 45–64 - NCT07535112RecruitingPhase 1
Testing BAY 3771249 for Advanced Colorectal Cancer With KRAS Mutation
This early-stage study tests a new drug called BAY 3771249 in people with advanced colorectal cancer that has a specific genetic change (KRAS G12D mutation). Researchers want to learn if it's safe and whether it helps shrink tumors.
San Diego, CaliforniaAges 18 years+ - NCT06324357RecruitingPhase 1/Phase 2
Zongertinib for HER2-positive cancers that have spread
This trial tests a new pill called zongertinib, alone or with other drugs, for people with HER2-positive cancers (like breast, stomach, or colorectal cancer) that have spread and are no longer responding to standard treatments. The goal is to find the best dose and see if it can help shrink tumors or slow the disease.
Cerritos, CaliforniaAges 18 years+ - NCT06880055Recruiting
Shield blood test for colorectal cancer screening
This study is testing the Shield blood test for people at average risk of colorectal cancer. It looks at how well the test works for screening, so you can learn about your risk with a simple blood draw.
Anaheim, CaliforniaAges 45–81 - NCT06937177RecruitingPhase 2
Testing mifomelatide to help maintain weight during chemo
This trial tests an investigational drug called mifomelatide (TCMCB07) to see if it can help people with newly diagnosed colorectal or pancreatic cancer maintain a healthy weight while receiving certain types of chemotherapy. You would give yourself a daily injection under the skin.
Los Angeles, CaliforniaAges 18 years+ - NCT00843375Recruiting
Testing stool samples to find early colon cancer and polyps
This study checks stool samples to see how well stool tests can detect early colon cancer and precancerous growths called adenomas. If you qualify, you’ll collect stool samples for a lab test (FIT) and sometimes this helps sort who should get follow-up testing.
Los Angeles, CaliforniaAges 18 years+ - NCT04429542RecruitingPhase 1
Test of an EGFR-targeting drug for advanced solid cancers
This Phase 1 study tests the safety of BCA101 (an EGFR-targeting treatment) alone or combined with pembrolizumab. It may help people with certain EGFR-driven advanced cancers, depending on the tumor type, prior treatments, and required biopsy testing.
La Jolla, CaliforniaAges 18 years+ - NCT06399757RecruitingPhase 1/Phase 2
A study of APL-5125 for advanced solid tumors
This trial tests a new drug called APL-5125 for people with advanced solid tumors that have not responded to or cannot be treated with standard therapies. If you have certain types of advanced cancer, this study may offer a new option.
Duarte, CaliforniaAges 18 years+ - NCT06997497RecruitingPhase 3
Study of Calderasib with other drugs for colorectal cancer
This trial tests a new drug called Calderasib combined with targeted therapy or chemotherapy for people with advanced colorectal cancer that has a specific genetic change (KRAS G12C mutation). It may be an option for those who have not had prior treatment for advanced disease.
Los Angeles, CaliforniaAges 18 years+ - NCT06004245RecruitingPhase 1
Study of VVD-133214 for advanced solid tumors
This trial tests an experimental drug called VVD-133214, alone or with other medicines, in people with advanced solid tumors that have specific DNA repair problems (MSI-H/dMMR). The goal is to see if it is safe and effective.
Duarte, CaliforniaAges 18 years+ - NCT03947385RecruitingPhase 1/Phase 2
First drug test for metastatic uveal melanoma with specific gene changes
This Phase 1/2 trial studies IDE196 in adults with metastatic uveal melanoma that has certain gene mutations or fusions. It’s mainly testing safety and correct dosing, and may help shrink tumors in patients matched to the tumor’s genetic changes.
Los Angeles, CaliforniaAges 18 years+ - NCT04792684Recruiting
Collecting colon samples from adults with colon findings
This study collects body samples to help evaluate tests for people with suspected or newly diagnosed colorectal conditions, often around the time of colonoscopy or surgery. Depending on the arm, you may be asked to have a colonoscopy soon or to provide samples before planned surgery.
Chula Vista, CaliforniaAges 45–84 - NCT07114601RecruitingPhase 1
Study of LY4257496 for people with GRPR-positive solid tumors
This trial tests a new drug, LY4257496, in people with certain types of cancer that have a protein called GRPR on their cells. The study aims to see if the drug can help shrink tumors or slow the cancer's growth.
Duarte, CaliforniaAges 18 years+ - NCT06376565Recruiting
Improving colonoscopy follow-up for high-risk polyps
This study aims to understand why some people return for a follow-up colonoscopy after having high-risk colon polyps and to find ways to improve the process. It involves interviews and testing new approaches to ensure patients get the right follow-up care.
Los Angeles, CaliforniaAges 21 years+
Where these studies are running in California
Institutions with a site for the recruiting colorectal cancer screening studies listed above.
- City of Hope Comprehensive Cancer Center · 5 studies
- University of California, Los Angeles (UCLA) · 4 studies
- USC / Norris Comprehensive Cancer Center · 4 studies
- City of Hope Orange County Lennar Foundation Cancer Center · 3 studies
- Los Angeles Cancer Network · 3 studies
- University of California Los Angeles · 3 studies
- Cancer and Blood Specialty Clinic · 2 studies
- Cedars-Sinai Medical Center · 2 studies
What taking part in a colorectal cancer screening 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.
Common questions
- Are there colorectal cancer screening clinical trials in California?
- Yes. We're currently tracking 50 recruiting colorectal cancer screening 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 colorectal cancer screening 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 colorectal cancer screening 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 colorectal cancer screening 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.