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Mary Feng


Radiation oncologist
Mother, foodie, hiker and traveler

About me

Pronouns: She | Her | Hers

Dr. Mary Feng is a radiation oncologist who cares for patients with cancers affecting organs of the abdomen and pelvis.

In research, Feng aims to refine radiation therapy so that it's more effective and has fewer side effects through the use of advanced technologies and imaging techniques. Her work includes improving radiation treatment when used alone as well as in combination with chemotherapy and immunotherapy.

As vice chair for clinical research in the Department of Radiation Oncology, Feng supervises and encourages innovative clinical trials at UCSF. As the medical director of the Clinical Research Network Office at the Helen Diller Family Comprehensive Cancer Center, she helps local UCSF partners expand clinical trials into the community.

Feng earned her medical degree at Washington University School of Medicine in St. Louis. She completed a residency in radiation oncology at the University of Michigan Hospitals.

  • Education

    Washington University School of Medicine in St. Louis, 2002

  • Residencies

    University of Michigan Hospitals, Radiation Oncology, 2007

  • Board Certifications

    Radiation Oncology, American Board of Radiology

  • Academic Title


I am motivated to improve the lives of patients and families today – and impact many more in the future.

Where I see patients (1)

    My reviews


    Overall Experience
    58 Ratings
    About our process
    May 06, 2023
    World class care with professionalism and real caring! The best experience I could ever hope for!
    Jul 17, 2022
    I have had the very best care.
    May 02, 2022
    She has a comfort level and manner sympathetic to my condition and concerns and respect for my hesitations from fear and positive decisions
    Apr 11, 2022
    Very good experience!
    Mar 18, 2022
    Was wonderful and helpful