Peter Brennan, MD

Dr. Brennan graduated from Williams College Magna Cum Laude with a degree in chemistry. He then graduated second in his class form SUNY Upstate Medical College Magna Cum Laude. He completed residency in internal medicine and fellowship in gastroenterology at the University of Virginia and Medical College of Virginia respectively.

Dr. Brennan states that he gets the greatest professional satisfaction from getting to know his patients personally so he can apply the continually expanding science in gastroenterology for their benefit.

In his off hours Dr. Brennan enjoys the outdoors in all seasons and serves on the board of The Nature Conservancy of Central and Western New York.

CMA Gastroenterology
2 Ascot Place
Ithaca, NY 14850
(607) 339-0788
Fax: (607) 319-5529
Hours: Mon.-Fri.  8:00 a.m. – 5:00 p.m.


Doctor of Medicine, State University of New York Upstate Medical University (Syracuse, NY)

Internship: University of Virginia Medical Center (Charlottesville, VA) – Internal Medicine

Residency: University of Virginia Medical Center (Charlottesville, VA) – Internal Medicine

Fellowship: University of Virginia Medical Center (Charlottesville, VA) -Gastroenterology

Areas of Special Clinical Interest

Colonoscopy and colon cancer screening

Inflammatory bowel disease (IBD)

Liver Disease

Internal bleeding and iron deficiency

Stomach acid disorders

Chronic diarrhea


American Board of Internal Medicine; Gastroenterology


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