Casey Williamson, M.D., M.A.S. (he/him)

  • Assistant Professor of Radiation Medicine, School of Medicine


Dr. Williamson specializes in caring for patients with gynecologic and genitourinary cancers with expertise in both external beam radiation therapy and brachytherapy. Dr. Williamson chose radiation oncology because it allows him to treat patients with cancer with the highest level of precise technology. Every patient's situation is unique and deserves a personalized approach.

Dr. Williamson also strives to ensure clear communication and understanding, even in very complicated situations. It is a tremendous privilege to work with patients experiencing cancer and with an amazing team at OHSU. Dr. Williamson also has an extensive research background with special focus on advanced imaging and radiation treatment planning as well as outcomes following treatment planning. Outside of work, Dr. Williamson loves spending time with his wife and son. He is an avid skier and enjoys running, hiking, camping, and reading.

Special focus: cervical cancer, endometrial cancer, vulvar cancer, prostate cancer, bladder cancer, kidney cancer, testis cancer, penile cancer

Education and training

    • M.D., 2017, UC San Diego School of Medicine
    • M.A.Sc., 2016, Clinical Research, UC San Diego School of Medicine
    • B.A., 2010, University of Southern California
  • Internship

    • Internal Medicine, UCLA-Olive View, 2018
  • Residency

    • Radiation Oncology, UC San Diego, 2022

Memberships and associations:

  • American Society for Radiation Oncology
  • American Brachytherapy Society


Elsevier pure profile


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