Gregory E. Idos

Assistant Professor of Clinical Medicine
Gregory E. Idos, MD

Areas of treatment:

Cancer Screening and Prevention
Diagnosis and Management of Hereditary/Familial Cancer Syndromes
Gastrointestinal Cancer


  • Gastroenterology
  • Internal Medicine


  • Department of Medicine


  • English

Gregory E. Idos, MD

Assistant Professor of Clinical Medicine

Practicing location:

  • USC Norris Comprehensive Cancer Center and Hospital

About this doctor:

Dr. Gregory Idos is a gastroenterologist with specialized training in hereditary cancer syndromes. Having trained in Boston at Brigham and Women’s Hospital and Dana Farber Cancer Center under the direction of national experts, Dr. Idos has an extensive background in caring for patients with hereditary colorectal cancer syndromes, notably Lynch Syndrome and familial adenomatous polyposis (FAP). Currently, he works with Stephen Gruber, Director of USC Norris Comprehensive Cancer Center, as part of the USC Norris Cancer Genetics Program. The USC Norris Cancer Genetics Program specializes in care for persons with a personal or family history of cancer who may benefit from genetic testing and counseling to understand and manage their risk of cancer. In addition, Dr. Idos’ research interest is focused on the study of gastrointestinal cancer and cancer chemoprevention. Currently, he directs studies aimed at understanding the use of genetic information for the overall risk reduction and prevention of cancer.


Doctor of Medicine, University of Vermont College of Medicine, 2006


LAC+USC Medical Center, Internal Medicine, 2006 - 2007


LAC+USC Medical Center, Internal Medicine, 2006 - 2009


Harvard Medical School, Brigham and Women's Hospital, Clinical and Research Fellow in Gastroenterology, Hepatology and Endoscopy, 2009 - 2012


American Board of Internal Medicine

Professional society memberships:

American College of Physicians
American Gastroenterological Association
American College of Gastroenterology
American Association for Cancer Research


Top Doctor, Pasadena Magazine
Howard Hughes Undergraduate Research Fellow
Intern of the Year, LAC+USC Medical Center
Senior Resident of the Year, LAC+USC Medical Center
Fellowship Teaching Award, Brigham and Women's Hospital, Harvard Medical School