Koen De Geest M.D.

Photo of Koen De Geest, M.D.
Faculty profile
  • Gynecologic oncologist

Professor of Obstetrics and Gynecology School of Medicine

Accepting new patients

4.8 out of 5 (278 Ratings, 100 Comments)


  • Cancer
  • Gynecologic Oncology
  • OB/GYN

Special focus on

  • Gynecologic Cancers (Rare)
  • Gynecologic Oncology


  • B.S., University of Gent Belgium 1973
  • M.D., University of Gent Belgium 1977
  • Residency:

    • University of Gent, Belgium, 1982
  • Fellowship:

    • Fellowship in gynecologic oncology, Pennsylvania State University, 1990
  • Certifications:

    • Belgian Board of Obstetrics and Gynecology


Dr. De Geest is a renowned specialist in gynecological cancers who has been voted in the top 1% of gynecologic oncologists nationally by Best Doctors in America®. He specializes in the diagnosis and treatment of:

Ovarian cancer Endometrial cancer Cervical cancer Vulvar cancer Gestational Trophoblastic Disease

Dr. De Geest’s current research interests include novel therapeutics and personalized treatment of ovarian and endometrial cancer. An accomplished researcher, he has actively participated in multiple clinical trials in ovarian, endometrial, cervical and vulvar cancer as principal investigator in the Gynecologic Oncology Group. He has authored and co-authored many of the publications resulting from these national trials. He has published on clinical and laboratory research in ovarian and endometrial cancer, and on the effects of mood and social support on the biology of ovarian cancer.

Prior to joining OHSU in 2013, Dr. De Geest was director of the Division of Gynecologic Oncology and the fellowship program at the University of Iowa in Iowa City. Earlier, he was vice-chairman in the Department of Obstetrics and Gynecology and director of Gynecologic Oncology at Rush University Medical Center in Chicago, Illinois.

Read more


  • English

Memberships and associations

  • American College of Obstetrics and Gynecology

Patient Ratings

4.8 out of 5 (278 Ratings, 100 Comments)

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 NRC patient surveys.

Patient Comments

  • Dec 20, 2019

    Excellent care and follow through

  • Dec 18, 2019

    Dr. DeGeest is an extremely knowledgeable oncologist, a talented diagnostician, and a skilled surgeon who is also kindhearted, empathetic, and a good listener. His incredible professionalism and his soothing manner guided me through a cancer diagnosis, surgery, and treatment, and restored me to good health. He continues to be accessible and gracious in semiannual checkups and on MyChart. I am very grateful to Dr. DeGeest and I recommend him without reservation.

  • Nov 25, 2019

    Dr de Geest comes highly recommended. Was professional, warm. He took time to answer questions.

  • Nov 20, 2019

    Very clear description of the issues

  • Nov 20, 2019

    Always pleasant. He makes sure I understand what is going on and is patient to take time to explain procedures.

  • Nov 15, 2019

    When(INAUDIBLE) explain things well, it was very courteous and friendly and he seem to know what he's talking about. And I thought like he was in charge and knew what he was doing. That's it.

  • Nov 14, 2019

    Extremely kind, caring and knowledgeable!! So patient and understanding. Truly the best doctor I’ve ever had!

  • Nov 06, 2019

    Dr was on time for appointment every one was friendly, and ask about my day. Lots of concern. I felt I was very important to everyone there,THEY HAD TIME TO CARE FOR ME.

  • Oct 31, 2019

    He was very good about listening. I felt comfortable that I was heard and he understood my concerns.

  • Oct 30, 2019

    My provider was very good, very professional, very to the point answered all my questions. I would recommend him very much. Thank you.

  • Oct 25, 2019

    I was treated with respect and dignity. I felt that the doctor and his associates were very professional ,very thorough and cared about me. I would recommend them to anyone.

  • Oct 17, 2019

    So far it was the first appointment. He was kind and patient. The team he is working with were very kind. They all were as informative as possible. They will know more after surgery.

  • Oct 15, 2019

    Degeest is EXCELLENT

  • Oct 14, 2019

    Dr Degeest and Tori are wonderful. They answer all your questions and don’t rush you.

  • Sep 24, 2019

    Excellent care...I am always confident that I am getting the best medical care possible!

  • Sep 20, 2019

    Knowledgeable and honest

  • Sep 20, 2019

    Dr. Degeest is the best doctor I could I hope to have had for my cancer. Dr. Degeest is professional, kind, knowledgeable. All the good adjectives one might have for a provider. And he Dr. Degeest and his team are actually my uncle-logical family at this point and I have only good things to say about them. I'm a lucky person to be under their care. And thank you, Dr. Degeest for saving me. Even though I still have cancer and it's terminal.

  • Sep 13, 2019

    As always, Dr and staff were outstanding. They were all concerned for my health and listened to me when I answered their questions. I feel like they genuinely care about me as a person and want to help me with my health issues. They are awesome!

  • Sep 11, 2019

    Very prompt, informative and professional.

  • Sep 04, 2019

    Doctor DeGeest is an amazing doctor! He explains things well, takes time to answer all questions, and really cares about his patients' wellbeing.

  • Aug 23, 2019

    Yes, I'm Dr. Degeest is an excellent position who takes time application see genuinely cares very quick to respond back when I have question regarding my care or treatment or or medications or pretty much anything his entire staff. It's very caring and I really appreciate how he is really very up to date on the latest research and that's very important to me. He's always looking for better treatments and and talking to me about those during during a session. Thank you.

  • Aug 14, 2019

    The gynecologist overseeing my care was helpful, but the process with the medical assistant, doctor and intern was difficult, impersonal and insensitive.

  • Jul 19, 2019

    This provider is very compassionate and caring and listens very well to his patients. I am only alive today because of the outstanding health care that he provides.

  • Jul 19, 2019

    It was on on time appointment. It was (INAUDIBLE) he answered questions. Let me know. It was a thorough check up and I would definitely return to Dr. Degeest. Thank you.

  • Jul 16, 2019

    Doctors and staff were all excellent!

  • Jul 07, 2019

    calm, organized, clear, able to understand.

  • Jul 03, 2019


  • Jul 01, 2019

    So grateful to have the oncology team at OHSU as my healthcare providers. Dr.DeGeest saved me from unbearable pain. The care I've been receiving from him, his team, and all the staff is above and beyond my highest expectations. I'm lucky to be under his care!

  • Jun 29, 2019

    My experience with Dr. Degeest is wonderful. My bad experience is having to follow through on appointments being set up and that is why I gave you an 8. Thank you.

  • Jun 27, 2019

    Excellent. The three month checkups after surgery and chemo alternate between Dr DeGeest and PA Lisa Egan. An excellent system that maximizes the qualities of both providers, benefiting patients

  • Jun 27, 2019

    It was very good as usual

  • Jun 26, 2019

    Everything went fine

  • Jun 26, 2019

    The staff and the doctors were very kind answered all questions and were very informative

  • Jun 09, 2019

    Dr. Degeest came in and we discussed how my health had been since my last visit. He then examined me, asked pertinent questions and then advised me of his findings and told me when I should return for my next checkup.He was very pleasant and professional.

  • Jun 07, 2019

    Dr. Degeest is a really good doctor and he's got an assistant named Tory that's just awesome as well. So I'm very grateful to be able to have them as my team.

  • Jun 05, 2019

    Always very efficient, well-run process

  • May 29, 2019

    He seems very knowledgeable and carefully considers patient treatment and is very nice.

  • May 22, 2019

    awesome place

  • May 16, 2019

    He was very kind and thorough. I have atypical presentation of symptoms and he is the first doctor who was not stumped, surprised, or flummoxed by my medical history.

  • May 11, 2019

    I thought he was very very good very thorough and very accurate. Thank you.

  • May 11, 2019

    I feel confident with this provider and reassured when he discusses my prognosis.

  • May 09, 2019

    There is nothing whatsoever that could possibly be improved with the care I have received from this amazing doctor! Dr. DeGeest is beyond impeccable! He & his entourage did a phenomenal surgery for me 5-years ago. They found Stage 4 cancer & removed it completely!He has been with me every step of the way & the cancer NEVER once came back! Dr. DeGeest has always been honest with me & very thoughtful about my situation. This surgeon & clinician is beyond compassionate & kind-hearted! He's simply the best of the BEST! OHSU is extremely fortunate to have this fabulous surgeon & clinician on staff! I absolutely love him and appreciate everything he has done for me during the past 5-years!

  • May 03, 2019

    I thought that Dr. Degeest listen, he wanted to know my information or my history problem solved with me and he was very direct in his mannerism making me understand and Build a process the information is being provided.

  • Apr 26, 2019

    Dr DeGeese and his team were very professional, caring, and took the time to answer all my questions. I feel very confident going forward to surgery in their care. I was really impressed with the coordination in getting lab work, EKG, etc., and the form made out with directions. I have worked up here for years, but it made it very simple to proceed from one stop to the next, and still get to work on time.

  • Apr 26, 2019

    Dr. Degeest and his team of physicians has been wonderful and amazing to me. I had a very large white pelvic Mass that needed kind of a quick removal. I had my surgery yesterday 4/25. I'm actually in the hospital right now and a room feeling very well taken care of. I'm very confident in the procedure that he did and I feel very cared for by the whole team here that works with him. And of course, everyone that works there at OHSU but Dr. Degeest has been amazing and wonderful. My first visit with him was in Salem. So that's where I live the Salem hospital area and he did right away have me come up here for my pre-op and my surgery. His staffed did a wonderful job getting my visits authorized cuz I have Providence insurance and I was authorized in approved for the surgery that was desperately needed to remove this very *

  • Apr 25, 2019

    He was very informative, knowledgeable and supportive.

  • Apr 25, 2019

    Professional and reassuring. Dr. Degeest is the best of the best.

  • Apr 19, 2019

    Dr. Degeest is a very compassionate doctor, and he he and his team are on top of things that are going on with me and my treatment and I really appreciate that.

  • Apr 17, 2019

    I count myself lucky to be in treatment under Dr. DeGeest and his team and staff. He is experienced, professional, patient and wise. I know I'm in good hands - maybe even the best in Portland!

  • Apr 17, 2019

    Dr DeGeest is very thorough, explains things in terms I can understand and is very friendly.

Make an Appointment

503 418-4500

Refer a Patient

Physician Advice and Referral Service

I see patients at