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Katherine Van Loon
4.8 out of 5 (94)
Katherine Van Loon

Katherine Van Loon, MD, MPH

Gastrointestinal Medical Oncology

Gastrointestinal Medical Oncology Clinic
1825 Fourth St., Fourth Floor,
San Francisco, CA 94158
(415) 353-9888
4.8 out of 5 (94)
Virtual visits available
4.8 out of 5 (94)
Virtual visits available
Gastrointestinal Medical Oncology Clinic
1825 Fourth St., Fourth Floor,
San Francisco, CA 94158
(415) 353-9888

Dr. Katherine Van Loon is a specialist in gastrointestinal cancers, with a particular interest in colon cancer.

With a background in public health, Van Loon's research is focused on epidemiology – the study of which populations develop diseases and which factors contribute – as well as outcomes in gastrointestinal malignancies. She has a long-standing interest in global health and has also studied the epidemiology of gastrointestinal cancers in the developing world.

Van Loon earned her master's degree in public health from the Yale School of Public Health before attending the Medical College of Georgia. She completed a residency in internal medicine at Beth Israel Deaconess Medical Center, a teaching hospital of Harvard Medical School. She came to UCSF for a fellowship in oncology in 2009.

Van Loon is a member of the American Society of Clinical Oncology (ASCO). She received a Young Investigator Award from the ASCO Conquer Cancer Foundation in 2012.

  • Board Certifications

    American Board of Internal Medicine, Medical Oncology, 2012

  • Fellowships

    UCSF, Oncology, 2011

  • Residencies

    Beth Israel Deaconess Medical Center, Internal Medicine, 2009

  • Internship

    Beth Israel Deaconess Medical Center, Internal Medicine, 2007

  • Education

    Medical College of Georgia at Georgia Health Sciences University, 2006

  • Languages

    English

"Sitting with a patient in crisis is hard, but it's also a privilege."

Meet Dr. Van Loon

Conditions I specialize in

Treatments I provide

Where I see patients (1)

    My reviews

    4.8

    Overall Experience
    94 Ratings
    About our process
    Feb 14, 2025
    I am a cancer patient and even if things turn out for the worse, I WILL FOREVER BE GRATEFUL TO DR VAN LOON. She is a wonderful and brilliant doctor. She is caring and will never give me a death sentence. She will try everything, doing everything so that I can still be with my family.
    Jan 24, 2025
    Dr Van Loon is a very good communicator.
    Jan 24, 2025
    Always a good experience
    Jan 04, 2025
    Dr K Vanloon is an extra caring provider. So lucky to have her as my physician.
    Dec 22, 2024
    Dr. Van Loon is a fantastic doctor. I recommend UCSF to anyone that needs care.
    Nov 02, 2024
    I have a good doctor, I am in a good hands Thank you
    Sep 14, 2024
    If outstanding were an option I'd give Dr van loon outstanding!
    Sep 06, 2024
    Care provider has been awsome
    Sep 06, 2024
    Dr Katherine Van Loon is the only one I trust. Whatever happens to my health, I will always be grateful to Dr Van Loon for extending my time as a mother to my girls.
    Apr 22, 2024
    Every visit has been very pleasant and efficient
    Apr 21, 2024
    I have already recommended both UCSF and Dr.Van Loon. She is a brilliant physician and I was fortunate to be her patient.
    Sep 06, 2023
    Every interaction has been positive.
    Jun 16, 2023
    The doctors who tended me are excellent I would recommend them are the best

    Selected research

    See all research

    My work

    Battling cancer during pregnancy

    Dr. Van Loon led a team-wide effort to treat a patient diagnosed with colon cancer during pregnancy, including safely administering chemotherapy.

    Contact me

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