Portrait of Katherine Van Loon
ucsf logo

Katherine Van Loon, MD, MPH

Gastrointestinal Medical Oncology
Gastrointestinal Medical Oncology Mission Bay
415-353-9888
Portrait of Katherine Van Loon
Portrait of Katherine Van Loon
ucsf logo

Katherine Van Loon, MD, MPH

Gastrointestinal Medical Oncology
Gastrointestinal Medical Oncology Mission Bay
415-353-9888

On this page

About me

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.

Education & training

Board certification

  • Medical Oncology, American Board of Medical Specialties
  • Internal Medicine, American Board of Internal Medicine

Fellowship

  • Oncology, University of CA at San Francisco School of Med

Residency

  • Internal Medicine, Beth Israel Deaconess Medical Center - Int Med GME

Internship

  • Internal Medicine, Beth Israel Deaconess Medical Center - Int Med GME

Degree

  • MD, Medical College of Georgia

Locations

    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.

    Reviews

    Average rating

    4.9
    4.9 out of 5 Stars
    90 ratings
    About provider reviews

    Showing 1-6 of 18 reviews

    Sort by
    • 5 out of 5 Stars
      January 25, 2026

      Dr Van Loon extended the time I have with my family. I will always be grateful.

    • 5 out of 5 Stars
      December 14, 2025

      Good

    • 5 out of 5 Stars
      December 7, 2025

      I just wished there was a after visit summary of our talking points in my chart because I couldn't remember all the information about treatment plan moving forward.

    • 5 out of 5 Stars
      October 16, 2025

      Dr Van Loon saved my life and extended the time my children will have their mother.

    • 5 out of 5 Stars
      August 3, 2025

      It was a great experience since I am now clear of stage 4 colon cancer, which went into my liver and lung. Clear of all cancers for 5 years now!!!

    • 3.9 out of 5 Stars
      August 2, 2025

      The care I receive is good and the treatments have been generally successful, however distant and impersonal. I would have to advise prospective patients that Zoom and Mychart are the main source of contact with my doctor. I am grateful for the treatment I have received but others may want see their provider closer and more personally involved, at least at the outset of their relationship. I'd like to add that the many, many nurses, technicians and customer service people I interacted with at MB over the last 16 months have been receptive, kind and helpful.

    Please check with your health insurance plan regarding coverage for this type of care. Not all providers at UCSF Health are covered by every insurance plan.

    For informational purposes only, a link to the federal Centers for Medicare and Medicaid Services (CMS) Open Payments web page is provided here. The federal Physician Payments Sunshine Act requires that detailed information about payment and other payments of value worth over ten dollars ($10) from manufacturers of drugs, medical devices, and biologics to physicians and teaching hospitals be made available to the public.