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Corey A. Siegel, MD, MS

About Corey A. Siegel, MD, MS

Corey A. Siegel, MD, MS, is the Director of the Center for Digestive Health, Section Chief of Gastroenterology and Hepatology, and the Co-Director of the Inflammatory Bowel Disease (IBD) Center at the Dartmouth Hitchcock Medical Center in Lebanon, New Hampshire. He is the Constantine and Joyce Hampers Professor of Medicine and a professor at The Dartmouth Institute for Health Policy and Clinical Practice at the Geisel School of Medicine at Dartmouth.

Dr. Siegel attended college at Tufts University and then received his medical degree from Tufts University School of Medicine in Boston, Massachusetts. He completed his residency in internal medicine at the Dartmouth Hitchcock Medical Center, where he also served as chief medical resident. He then completed a fellowship in gastroenterology at Dartmouth Hitchcock followed by a fellowship in IBD at Massachusetts General Hospital in Boston.

Dr. Siegel’s research interests include understanding risk/benefit tradeoffs in IBD, developing models to predict outcomes in Crohn’s disease, creating tools to facilitate shared decision-making, expanding telemedicine services to patients with IBD living in rural locations, and improving the quality of care delivered to patients with IBD. He has been funded by the National Institutes of Health (NIH), the Agency for Healthcare Research and Quality (AHRQ), the Crohn’s & Colitis Foundation, and the Leona M. and Harry B. Helmsley Charitable Trust for this work. He has lectured nationally and internationally and published numerous journal articles and book chapters on this and other topics in IBD. Dr. Siegel is the founder of the BRIDGe group, an international research collaborative of IBD investigators. He is currently the co-chair of the Crohn’s & Colitis Foundation Quality of Care Program (IBD Qorus). Dr. Siegel was inducted into the International Organization for the Study of IBD (IOIBD) in 2013, and he received the Sherman Prize in 2023. He lives in Hanover, New Hampshire with his wife and three boys.


  • Consultant/Advisory Board
    • Takeda, AbbVie, BMS, Boomerang Medical, Buhlmann, Janssen, Lilly, Napo Pharmaceuticals, Pfizer, Prometheus Biosciences, Prometheus Labs, Roivant, Trellus Health
  • Speaker for CME Activities
    • Takeda, AbbVie, Janssen, Pfizer, Grant support
    • Crohn’s & Colitis Foundation
    • Leona M. and Harry B. Helmsley Charitable Trust
    • AbbVie, BMS, Janssen, Lilly, Pfizer
  • Intellectual Property
    • MiTest Health, LLC (software company), has a patent for a “System and Method of Communicating Predicted Medical Outcomes.”
    • ColonaryConcepts, LLC, has United States patents on “Dietary Purgatives” and “Foods, Systems, Methods, and Kits for Providing Electrolyte Replacement.”
  • Equity Interest
    • Dr. Corey Siegel and Dr. Lori Siegel are co-founders of MiTest Health, LLC (software company). Technology developed by MiTest Health, LLC, has been licensed to Takeda.
    • Dr. Corey Siegel is a co-founder of ColonaryConcepts, LLC.