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 (140 Ratings, 42 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. He was very helpful and explained things well

  2. A very pleasant experience..

  3. I have made a few recommendations

  4. Great experience

  5. He explained in terms easy to understand.

  6. I had a comfortable visit with the doctor. He answered questions I asked. He showed knowledge of my personal health record. He didn't come across as being in a rush and I appreciated feeling heard.

  7. Very clear about explaining what would occur in this first appointment, as well as put a video about what to expect. This was excellent, since I hadn't a clue to how the treatment was like at all. So, it prepared me a lot better then any video I watched before. This helped me to prepare questions to ask the Doctor's when they came in to the appointment.

  8. I felt calm the team I liked all

  9. Good people

  10. Everyone is person oriented, as well as kind and considerate.

  11. Thorough

  12. Knowledgeable, confident, caring, listens well.

  13. Professional

  14. Very good

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

  16. Informative about my condition.

  17. Knowledgeable, patient, smiled at my jokes

  18. Very clear about procedures.

  19. Very professional & friendly.

  20. 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.

  21. Super. No complaints.

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

  23. Very good. Knowledgeable and very friendly

  24. Knowledgeable, personable, caring, good communicator

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

  26. 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.

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

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

  29. Great

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