John Charles Byrn, MD
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About
John C. Byrn, M.D is a Clinical Professor of Surgery in the Division of Colorectal Surgery. He graduated from Hope College with a B.A. in Chemistry and received his MD degree from the University of Illinois-Chicago College of Medicine. He trained in general surgery at Mount Sinai School of Medicine in New York, NY. Dr. Byrn went on for his Colon and Rectal residency at the Cleveland Clinic, Cleveland, OH. Dr. Byrn was a Clinical Assistant and Associate Professor of Surgery at the University of Iowa Hospitals and Clinics from 2009-2015 and served as the Chief of the Section of Colorectal Surgery from 2013-2105.
Areas of Practice
Benign and malignant diseases of the colon and rectum, inflammatory bowel disease, minimally invasive colorectal surgery, and robotic colorectal surgery.
Expertise
Locations
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General Surgery Clinic | Taubman Center 1500 E Medical Center Dr
Floor 2 Reception C
Ann Arbor, MI 48109-5331Get Directions -
Multidisciplinary Colorectal Cancer Clinic | Rogel Cancer Center 1500 E Medical Center Dr
Level B1 Reception E
Ann Arbor, MI 48109-5912Get Directions -
Medical Procedures Unit | University Hospital 1500 E Medical Center Dr
Floor 2
Ann Arbor, MI 48109-5051Get Directions -
Michigan Bowel Control Program | Von Voigtlander Women's Hospital 1540 E Hospital Dr
Floor 9
Ann Arbor, MI 48109-4276Get Directions
Insurance Accepted
University of Michigan Health participates with most health insurance plans.
Education & Training
Medical School or Training
Residency
Fellowships
Board Certifications
Research Overview
Dr. Byrn’s research and clinical interests include outcomes in benign and malignant diseases of the colon and rectum, inflammatory bowel disease, minimally invasive colorectal surgery, and robotic colorectal surgery
Patient Ratings & Comments
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Patient Ratings
210 Patient Ratings
Patient Comments
May 14, 2026 - "I was referred to Dr. Byrn for [...] and to discuss surgical options. He did discuss surgical options but said that they were not an option for me. That was fine. But he said he didn't do [...]. He checked with providers in that office, but then said I was on my own to find someone who does. I asked if there was a referral department to help, and his response was 2 words "not really." [...]"
April 9, 2026 - "Dr. Byrn was amazing! I was embarrassed about my condition and he made me feel at ease. I had the best possible experience because of Dr. Byrn."
March 14, 2026 - "Dr. Byrn is wonderful. I'm very grateful to have him for my doctor."
January 31, 2026 - "Dr. Byrn is an excellent surgeon! With a new situation I was experiencing I felt the repeated message yelled at me that I wasn't listening and this is what happens to people as they age, lacked empathy, civility, tact, understanding and professionalism. [...]"
January 20, 2026 - "Dr. Byrn always listens and answers my questions. I never feel that he is in a hurry. He listened to my concerns regarding the timing of a [...] and made arrangements to have it moved up."
December 2, 2025 - "When I asked follow-up questions, Dr. Byrn did a very poor job of disguising his impatience with me."
August 14, 2025 - "Dr Byrn is very nice and empathetic, he is cautious and wanted to coordinate care with my [...] doctor, which I appreciate"
