Who We Are

C4 is a statewide, 501-c(3) all-volunteer non-profit organization consisting of academic clinicians (family medicine, gastroenterology, general research, surgical oncology, nurse practitioner specialists, and pathology), Kaiser physicians, public health practitioners (nonprofits and state health departments), CRC survivors and advocates, American Cancer Society, American Cancer Society – Cancer Action Network, clinicians working for or with FQHC, and a CA tribal nations advocate. We are united in our mission to save lives and reduce suffering from colorectal cancer in all Californians.

Executive Board

Board Members

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Autumn Ogden-Smith

Autumn Ogden-Smith joined the American Cancer Society Cancer Action Network in February of 2015 as California’s State Legislative Director. Autumn brings more than 20 years

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Celena Donahue

I am Pueblo Indian, and my family is Hupa, Yurok, and Karuk.  I was raised on the Hoopa Valley Indian Reservation in rural northeastern Humboldt

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Gregory Idos, MD, MS

Dr. Idos is a board-certified gastroenterologist and trained cancer geneticist, who specializes in the care of patients with Lynch syndrome, FAP (familial adenomatous polyposis) and

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James Allison, MD

Dr. Allison received a BA with honors from the University of Pennsylvania, and, in 1969, his MD from the University of Rochester. His entire post

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Jon Greif, DO, FACS

Dr. Greif is a retired cancer surgeon and researcher who lives and practiced surgery in San Diego with the United States Navy and Kaiser Permanente,

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Kenneth Tai, MD

Dr. Kenneth Tai joined North East Medical Services in San Francisco in 2005.  He is currently serving as Chief Health Officer and Internal Medicine Residency Program

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Laura Goetz, MD, MPH

Dr. Laura Goetz started her career as a colorectal surgeon and spent over 15 years caring for colorectal cancer patients. She then chose to change

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Lukejohn Day, M.D.

Dr. Day is a professor of medicine at UCSF, Chief Medical Officer at the Zuckerberg San Francisco General Hospital (ZSFG) and current president of the

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Mary Beth Kropp, EdD

Mary Beth Kropp is a life-long educator serving in public schools for over 32 years prior to moving into consulting in 2016.  She specializes in aligning

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Michael Potter, MD

Dr. Michael Potter is a graduate of Harvard College and Harvard Medical School, and he completed his residency in family medicine and clinical research training

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Raquel Arias, MPH

Raquel is the Associate Director of State Partnerships in California for the American Cancer Society (ACS). In this specialized role, she impacts the entire cancer

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Samir Gupta, MD, MSCS

Dr. Samir Gupta is a Professor in the Division of Gastroenterology in the Department of Internal Medicine at the University of California, San Diego. He

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T. R. Levin MD

T. R. Levin is the Clinical Lead for Colorectal Cancer Screening for The Permanente Medical Group, Inc. He is also the Interim Associate Director for

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Ex Offico

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Shauntay Davis-Patterson, MPH

Shauntay Davis-Patterson is the current Program Director for California’s Comprehensive Cancer Control Program housed under the California Department of Public Health. Mrs. Davis-Patterson is responsible

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