Koen De GeestM.D.

  • Gynecologic oncologist
  • Professor of Obstetrics and Gynecology, School of Medicine


  • Cancer
  • Gynecologic Oncology
  • OB/GYN

Special focus on

  • Gynecologic Cancers (Rare)
  • Gynecologic Oncology

I see patients at


Before scheduling your appointment, we recommend you contact your insurance company to verify that the OHSU Health location or provider you plan to visit is included in your network. Your insurance company will also be able to inform you of any copayments, co–insurance, or deductibles that will be your responsibility. If you proceed in scheduling an appointment and your health insurance benefits do not participate with OHSU providers, your out of pocket liability may be higher. Visit the billing and insurance section of our site for more information.


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.


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

    • University of Gent, Belgium, 1982
  • Fellowship:

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

    • Belgian Board of Obstetrics and Gynecology


  • English

Memberships and associations

  • American College of Obstetrics and Gynecology

Patient ratings

4.7 out of 5 (186 Ratings, 73 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.

  1. {{ item.comments[0]['comment'] }}