Dr. Keith R. Unger, MD

Dr. Keith R. Unger, MD

Dr. Keith R. Unger, MD

Languages: English
Phone: 202-444-9676
Fax: 202-444-1610

Contact this Provider:

  • Radiation Oncology
Conditions I Treat
  • acoustic neuroma
  • adenocarcinoma of the head and neck
  • anal cancer
  • arteriovenous malformation (avm)
  • astrocytoma tumors
  • Show All
Procedures I Perform
  • 3d conformal radiation therapy
  • balloon breast brachytherapy
  • brachytherapy
  • chemoradiation
  • combined modality therapy
  • Show All
About the Provider

Board-certified radiation oncologist, Keith Unger, MD, is director of the Gastrointestinal Cancer Service for the Department of Radiation Medicine at MedStar Georgetown University Hospital, and director for the department's residency training and clinical translational research programs. He currently serves as chair of MedStar Georgetown University Hospital's cancer committee. Concurrently, he is associate professor of Radiation Medicine at the Georgetown University School of Medicine.

Dr Unger's clinical practice focuses on the treatment of complex gastrointestinal cancers and sarcomas as well as advanced radiation therapy techniques.

Dr. Unger completed his internship at MedStar Washington Hospital Center and residency at MedStar Georgetown University Hospital, including a year as chief resident for Radiation Oncology. He received both his undergraduate and medical degree from the University of Virginia, where he was the recipient of numerous academic honors and awards.

As a researcher and educator, Dr. Unger has been a co-author to multiple text book chapters and publications in peer-reviewed journals, as well as a presenter at major medical meetings. His research focuses on the development of novel radiation therapy techniques and reduction in treatment-related side effects. He is an investigator for several active clinical and basic science research studies and his work has been supported by grant funding. He previously served as chair of the gastrointestinal committee for the annual meeting of the American Society of Clinical Oncology.

Dr. Unger sees patients at both MedStar Georgetown University Hospital and MedStar Southern Maryland Hospital Center.

Conditions Treated:

  • Pancreatic cancer
  • Liver cancer
  • Esophageal cancer
  • Colorectal cancer
  • Other gastrointestinal cancers
  • Sarcomas
  • Brain and spine cancer
  • Breast cancer
  • General radiation oncology

Procedures performed:

  • Proton therapy
  • Intensity modulation radiation therapy (IMRT)
  • Stereotactic body radiation therapy, CyberKnife
  • Stereotactic radiosurgery, CyberKnife
  • Selective internal radiation therapy (TheraSpheres, Sirs Spherers)
  • Intraoperative radiation therapy (INTRABEAM)

  • Residency Program: MedStar Georgetown University Hospital (2011)
  • Internship Program: MedStar Washington Hospital Center (2007)
  • Internship/Residency: MedStar Washington Hospital Center (2007)
  • Medical School: University of Virginia School of Medicine (2006)
  • Board Certification: American Board of Radiology, Radiation Oncology

Kress MA, Sen N, Unger KR, Lominska CE, Deeken JF, Davidson BJ, Newkirk KA, Hwang J, Harter KW. "Safety and efficacy of hypofractionated stereotactic body reirradiation in head and neck cancer: Long term follow-up of a large series." Head Neck. (37)10. 2014.

Gurka M, Kim C, He R, Charabaty A, Haddad N, Turocy J, Johnson L, Jackson P, Weiner L, Marshall J, Collins S, Pishvaian M, Unger K. "Stereotactic Body Radiation Therapy (SBRT) combined with chemotherapy for unresected pancreatic adenocarcinoma." Am J Clin Oncol. 2014.Epub ahead of print.

Lischalk J, Oermann E, Collins S, Nair M, Nayar V, Bhasin R, Voyadzis J, Rudra S, Unger K, Collins B. "Five-fraction stereotactic radiosurgery (SRS) for single inoperable high-risk non-small cell lung cancer (NSCLC) brain metastasis." Radiat Oncol. 10:2016. 2015.

Lischalk J, Kole T, Anjum H, Obayomi-Davies O, Rashid A, Unger K. "Four-dimensional computed tomography prediction of inter- and intrafractional upper gastrointestinal tumor motion during fractionated stereotactic body radiation therapy." Pract Radiat Oncol. 15. 2016.

Gabrielson A, Miller A, Banovac F, Kim A, He AR, Unger K. "Outcomes and predictors of toxicity after selective internal radiation therapy using Yttrium-90 Resin Microspheres for unresectable hepatocellular carcinoma." Front Oncol. 5:292. 2015

    MedStar Health Providers participate with a wide range of health insurance products. We accept self-pay patients and the insurances plans listed below. This list is not comprehensive, it is updated periodically and is subject to change. If you do not see your health insurance plan or product listed, or if you have any questions regarding MedStar Health’s participation with your health plan, please contact your health plan to verify participation with our providers.

    Since the MedStar Health providers span the District of Columbia, Maryland and Virginia regions, our participation with DC, Maryland and Virginia Medical Assistance programs varies by provider group. Please contact your MedStar Physician’s Office to assist with verifying Medical Assistance participation. If you are enrolled in a Medicaid Managed Care Organization, please contact your Medicaid health plan to verify participation.

Practice Locations
Member of Medical Staff
  • MedStar Southern Maryland Hospital Center
  • MedStar Georgetown University Hospital
  • Association of Residents in Radiation Oncology Educator of the Year
  • Radiation Research Society Scholars in Training Travel Award