Gastroenterology
Leon McLean, MD
Clinical Assistant Professor of Medicine, Geisel School of Medicine at Dartmouth College; Medical Director, Surgical Center of New Hampshire at Derry; Director of Endoscopy, Parkland Medical Center
Dr. Leon P. McLean, MD, PhD, MPH, AGAF, is a board-certified gastroenterologist with over 20 years of experience, specializing in the management of inflammatory bowel disease (IBD), including Crohn's disease and ulcerative colitis. He serves as a managing partner at Granite State Gastroenterology, Medical Director of the Surgical Center of New Hampshire at Derry, and Director of Endoscopy at Parkland Medical Center. As Clinical Assistant Professor of Medicine at Geisel School of Medicine at Dart
20+
Years in Practice
Credentials
Board Certifications
- Gastroenterology (ABIM)
- Internal Medicine (ABIM)
Education & Training
- Tufts University School of Medicine — M.D.
- University of Maryland — Residency, Internal Medicine
- University of Maryland School of Medicine — Ph.D.
Peer Recognition
- Castle Connolly — Top Doctor
2025-2026 (2 years)
Clinical Focus
Subspecialties
Conditions & Treatments
Practice Details
Hospital Affiliations
- Parkland Medical Center
- Androscoggin Valley Hospital
- Elliot Hospital
Languages
English
Experience
20+ years in practice