Patient Rating/5

John M. Haydek

MD, FACP, FACG, AGAF, FASGE


Loyola University Medical Center in Chicago


Loyola University Medical Center in Chicago


Loyola University Medical Center in Chicago


American College of Physicians, American College of Gastroenterology, American Gastroenterological Association, American Society for Gastrointestinal Endoscopy


Dr. Haydek was born and raised in Chicago, attending a Christian grammar school and seminary high school prior to obtaining his degree in pharmacy from the University of Illinois. He subsequently obtained his M.D. degree and completed his internship, medical residency, chief residency and gastroenterology fellowship at Loyola University Medical Center in Chicago.

Following his fellowship and prior to his relocation to Knoxville, Tenn., Dr. Haydek worked for three years as an academic gastroenterologist and assistant professor of medicine at Loyola University Medical Center and Edward Hines Jr. VA Hospital.

After joining Gastrointestinal Associates, Dr. Haydek was recruited by the Center of Excellence for Treatment of Barrett’s Esophagus at Thompson Cancer Survival Center to focus on endoscopic treatments for the disease and early stage esophageal cancer. Along with GIA’s Dr. Bergein Overholt, he has been a pioneer in the application of new endoscopic treatments, such as photodynamic therapy, radiofrequency ablation and a variety of endoscopic mucosal resection techniques. Dr. Haydek is the principal investigator for several clinical studies for patients with Barrett’s esophagus and serves as the medical director of the Center of Excellence for Treatment of Barrett’s Esophagus at Thompson Cancer Survival Center.

Dr. Haydek’s accomplishments are extensive and include more than 20 research publications, multiple nominations for “Outstanding Teacher” awards and several “Top Physician” honors, both locally and nationally.  In addition, he has attained the distinction of being appointed a fellow of the four major medical organizations including the American College of Physicians (FACP), the American College of Gastroenterology (FACG), the American Gastroenterological Association (AGAF) and the American Society for Gastrointestinal Endoscopy (FASGE).

He has also served as Chief of the Medical Staff at Tennova (formerly Mercy Medical Center St. Mary’s), as Committee Chair of the Pharmacy and Therapeutics Committee and is dual board certified in both internal medicine and gastroenterology.

Dr. Haydek and his wife, Susan, are the parents of three children. When not working, Dr. Haydek enjoys many outdoor activities, including fishing, hiking and bird watching.