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Ian S. Grimm, MD

Professor of Medicine, Division of Gastroenterology and Hepatology
Director of GI Procedures

Best Doctors in America 2019

Dr. Grimm has been practicing advanced therapeutic gastrointestinal endoscopy for nearly 30 years, and has had a longstanding interest in the non-surgical removal of complex polyps (very large or flat polyps). In 2016, he undertook a sabbatical to study endoscopic submucosal dissection (ESD) and per-oral endoscopic myotomy (POEM) in Japan, where these techniques were initially developed. Dr. Grimm has served as director of the GI Procedures unit at UNC Memorial Hospital since 2000.

Clinical Focus: Advanced therapeutic endoscopy, including complex polypectomy, endoscopic mucosal resection (EMR), endoscopic submucosal dissection (ESD), and peroral endoscopic myotomy (POEM); and translation of novel techniques into practice.

Academic Interests: Development of improved techniques for wide field mucosal resection; clinical development of novel endoscopic techniques.


Education and Training

  • Undergraduate Degree:  Dartmouth College, Biology
  • Medical Degree:  Thomas Jefferson Medical School
  • Residency:  Thomas Jefferson University Hospital
  • Fellowship:  Thomas Jefferson University Hospital, Gastroenterology

Selected Bibliography:

  • Grimm I, Peery AF, Kaltenbach T, et al. Quality Matters: Improving the Quality of Care for Patients With Complex Colorectal Polyps. Am J Gastroenterol 2018;113:317–321.
  • Grimm IS. Peroral Endoscopic Myotomy for the Management of Esophageal Disorders. Gastroenterol Hepatol (N Y) 2017;13:428–430. Available at: [Accessed April 19, 2018].

Additional Procedure Information: