Accepting new patients

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

Accepting new patients

  • Radiation Oncologist
  • Assistant Professor of Radiation Medicine, School of Medicine

Specialty

  • Cancer

Clinical focus

  • Bladder Cancer
  • Cervical Cancer
  • Endometrial Cancer
  • Gynecologic Oncology
  • Kidney Cancer
  • Penile Cancer
  • Prostate Cancer
  • Testis Cancer
  • Urologic Oncology
  • Uterine Cancer
  • Vaginal Cancer
  • Vulvar Cancer

Locations and contact

I see patients at
Large glass and brick building
Peter O. Kohler Pavilion
Read clinic details

About me

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

  • Degrees

    • 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
Read faculty profile

Insurance

Before scheduling an appointment

  1. Check your network. If you have health insurance,  call your company to find out if the OHSU Health location or provider you plan to visit is part of your network.
  2. Ask what you will pay. Your insurance company can tell you what your costs are likely to be.

If you schedule an appointment and your health insurance does not include OHSU Health, you may have to pay more than if you go to a provider in your insurance network. 

Visit our billing and insurance page for more information.

Ratings and reviews

Overall: 4.9 out of 5 (151 Ratings, 33 Reviews)

The patient ratings score is an average of all responses to the question "How likely would you be to recommend this provider to your family and friends (on a scale of 0 to 10)" on our nationally-recognized Press Ganey patient surveys.

  1. Very good

  2. He fixed my problem and explained everything I ask of him

  3. Informative about my condition.

  4. Knowledgeable, patient, smiled at my jokes

  5. Very clear about procedures.

  6. Very professional & friendly.

  7. She worked very hard to convey the options for surgery to me. After consultation we agreed on a path forward of 2 separate surgeries over a specific time period. I felt she had my best interests in mind.

  8. Super. No complaints.

  9. Dr. Williamson is very professional and explains medical issues very well.

  10. Very good. Knowledgeable and very friendly

  11. Knowledgeable, personable, caring, good communicator

  12. Dr. Williamson is a good communicator. Which is vital when dealing with difficult decisions, compounded by the fog of emotions.

  13. Dr. Williamson is simply the best! He answered every one of my questions with clarity and concern. He was really glad to see me as well.

  14. Nice manner, well informed and specific, seem familar with my situation and came with a draft plan.

  15. Dr Williamson was very helpful in that he answered all my questions and made the procedure painless.

  16. Great

  17. The entire staff were friendly and efficient. Nobody rushed. They all checked at least once to see if I had any questions or concerns

  18. Great customer service

  19. Oh My God!I believe my interactions with Dr Casey Williamson and also the other two doctors was one of my best experiences ever with a health care provider. ALL of the doctors including Dr. Williamson, first of all took time to answer all my questions (that could have been basic) with all the attentiveness as if it was equally as important as any question. For someone who is experiencing intermediate level of prostrate cancer this kind of response from the doctors are very assuring and comforting. I appreciate the doctor's level of concern, attentiveness, and personal availability was remarkable.Please thank all three doctors.

  20. Have had great care

  21. All good

  22. Very helpful, knowledgeable about my issues.

  23. Dr. Williamson explained my medical situation and how radiology might play a role in treating my condition. He was easy to understand, and I feel that I was well Informed of my options.

  24. Very good

  25. Spent all the time necessary to completely explain my condition and options for treatment. Answered every question (and there were many) that I posed clearly and compassionately.

  26. Dr. Williamson and the whole team provided excellent care. I felt very well taken care of each day I was there for the brachytherapy.

  27. Very easy to talk to and explained things clearly

  28. Compassionate informative supportive and helpful

  29. Look. You all are the best. None better. Take a bow. And please accept my thanks and gratitude.

  30. No complaints