About Terrance M. O'Toole, Jr., DO

Dr. Terry O’Toole is a graduate of the Ohio University Heritage College of Osteopathic Medicine. He went on to complete his Internal Medicine residency and Gastroenterology Fellowship training at the University of Cincinnati Medical Center. He has been board certified in Gastroenterology since 2009. Dr. O’Toole has served in a number of leadership roles both locally and statewide. He is the current President of the Ohio Gastroenterology Society (OGS), which represents the interests of nearly 200 Gastroenterologists throughout Ohio. Dr. O’Toole is also the immediate past Chair of Endoscopy at Mercy West Hospital.

Dr. O’Toole has consistently been voted by his medical peers as a “Top Doc” in Cincinnati Magazine. Dr. O’Toole has been a featured lecturer at several local conferences, including the Cincinnati chapter of the Crohn’s and Colitis Foundation of America, and the annual Ohio GI clinical symposium. Dr. O’Toole has also been a guest speaker with features on Cincinnati’s 55KRC, WCPO, and WLWT. Dr. O’Toole has been an active investigator in numerous clinical research studies involving novel treatments for Crohn’s disease and Ulcerative Colitis. Dr. O’Toole has a clinical interest in inflammatory bowel diseases, anorectal pathology such as hemorrhoids and fecal incontinence, GERD, management of dysplastic Barrett’s esophagus, functional GI disorders, and colon cancer prevention.

Conditions & Procedures

  • Abdominal Pain
  • Acid Reflux & GERD
  • Barrett's Esophagus
  • Colon Cancer Screening
  • Colon Diseases & Polyps
  • Colorectal (Colon) Cancer
  • Constipation
  • Crohn’s & Ulcerative Colitis
  • Diarrhea
  • Fecal Incontinence
  • Hemorrhoids
  • Inflammatory Bowel Disease
  • Irritable Bowel Syndrome
  • Swallowing Disorders
  • Anorectal Manometry
  • Colonoscopy (Screening & Diagnostic)
  • EGD (Upper Endoscopy)
  • ERCP & Stents
  • Hemorrhoid Treatment & Banding

Office Locations

Primary Location

Picture of the West Side Office

West Side

3301 Mercy Health Blvd.
Suite 445
Cincinnati, OH 45211

Phone: 513-751-6667
Fax: 513-389-7302

Additional Locations


2925 Vernon Pl.
Suite 100
Cincinnati, OH 45219

Phone: 513-751-6667
Fax: 513-872-4553


Marie Avenue

5525 Marie Ave.
Cincinnati, OH 45248

Phone: 513-751-6667
Fax: 513-389-7302



4746 Montgomery Rd.
Suite 202
Norwood, OH 45212

Phone: 513-751-6667
Fax: 513-872-4553


Procedure Locations

Having a procedure? It may not always be in the same location where you consulted with your doctor. Check with your doctor to make sure you’re headed to the right place.



Ohio University College of Osteopathic Medicine


University of Cincinnati Medical Center


University of Cincinnati Medical Center

Professional Highlights


Board Certified, Gastroenterology

Awards & Recognitions

  • Cincinnati Magazine, Top Doctor
  • Cincinnati chapter of the Crohn’s and Colitis Foundation of America featured lecturer 
  • Gastro Health Ohio Symposium feature lecturer 

Professional Memberships

  • President of the Ohio Gastroenterology Society (OGS)
  • Immediate Past Chair of Endoscopy at Mercy West Hospital
  • Medical Executive Committee at Mercy West Hospital