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

I am a radiation oncologist who specializes in treating adult patients with gynecologic and genitourinary cancers. I offer a variety of treatments including image-guided external beam radiation therapy, internal radiation (brachytherapy), and stereotactic body radiation therapy (SBRT). I also perform procedures designed to reduce the chance of side effects from radiation therapy including fiducial marker and spacer placements.

My approach to patient care is grounded in clear communication, personized treatment planning, and the belief that every patient’s situation is unique. By discussing treatment options in detail, my goal is to help patients make informed decisions that are right for them. Once we select a plan, I work closely with an outstanding team to deliver detail-oriented and evidence-based treatment to maximize effectiveness and minimize side effects. I strive to maintain close communication and coordination with all members of the patient’s care team.

I also devote time to teaching medical students, residents, and radiation therapy students and I am currently the Associate Program Director for our medical residency program. Additionally, I have research interests ranging from advanced imaging to outcomes studies to work aimed at improving patient experience.

Outside of work, I enjoy spending time with my family (wife, son, daughter, dog, and cat). I also love running, skiing, reading, and trying new restaurants.

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 (210 Ratings, 54 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. All good

  2. Kind and reassuring, and answered all my health related questions

  3. Superb clinician

  4. Dr. Williamson was knowledgeable, familiar with my unique situation, provided meaningful information, and actively Involved me In the decision-making process to develop the next steps in my care plan.

  5. My doctor is great. Very knowledgeable and nice.

  6. Kind, courteous, considerate! He answered any concerns we had.

  7. Very informative

  8. Great!

  9. The people are very kind, hospitable, and professional. They're also eager to assist you.

  10. He was very helpful and explained things well

  11. A very pleasant experience..

  12. I have made a few recommendations

  13. Great experience

  14. He explained in terms easy to understand.

  15. 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.

  16. 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.

  17. I felt calm the team I liked all

  18. Good people

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

  20. Thorough

  21. Knowledgeable, confident, caring, listens well.

  22. Professional

  23. Very good

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

  25. Informative about my condition.

  26. Knowledgeable, patient, smiled at my jokes

  27. Very clear about procedures.

  28. Very professional & friendly.

  29. 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.

  30. Super. No complaints.