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Ramnik Joseph Xavier, MD, PhD

Chief, Gastrointestinal Unit

Director, Center for the Study of Inflammatory Bowel Disease

Kurt Isselbacher Professor of Medicine, Harvard Medical School

  • Phone: 617-724-6007
Department of Medicine


  • Digestive Healthcare Center
  • Liver Center
  • Crohn's & Colitis Center
  • Colorectal Center
Clinical Interests
Ulcerative colitis
Crohn's disease
Celiac disease
Autoimmune disorders of the GI tract
Gastrointestinal cancer
Boston: Massachusetts General Hospital
Medical Education
PhD, University of Groningen - Netherlands
MD, University of Zimbabwe School of Medicine
Residency, Massachusetts General Hospital
Fellowship, Massachusetts General Hospital
Board Certifications
Gastroenterology, American Board of Internal Medicine
Internal Medicine, American Board of Internal Medicine
Patient Age Group
Accepting New Patients
Accepting New Patients: Call for Availability


  • Elected Member, American Association of Physicians
  • Senior Associate Member, Broad Institute of MIT and Harvard
  • Principal Investigator, Center for Computational and Integrative Biology


View my most recent publications at PubMed

  • Xavier RJ, Podolsky DK. Unraveling the pathogenesis of IBD. Nature 2007 Jul 26; 448(7152):427-34.
  • Khor B, Gardet A, Xavier RJ. Genetics and pathogenesis of inflammatory bowel disease. Nature 2011 Jun 15; 474(7351):307-17.

Ramnik Xavier, MD, named chief of Gastroenterology Division

MGH Hotline 01.08.09 Ramnik Xavier, MD, has assumed the position of chief of the Gastroenterology Division beginning Jan. 1.

Broad Institute and MGH announce major inflammatory bowel disease sequencing initiative

The Broad Institute and MGH are launching a new initiative to perform large-scale exome sequencing in inflammatory bowel disease.

Xavier appointed to Isselbacher professorship

Ramnik Xavier, MD, chief of the MGH Gastrointestinal Unit and director of the MGH Center for the Study of Inflammatory Bowel Disease, was honored with the first Kurt J. Isselbacher Professorship in Medicine in the Field of Gastroenterology, an endowed professorship at Harvard Medical School.

Newly diagnosed Crohn's disease patients show imbalance in intestinal microbial population

A multi-institutional study led by investigators from MGH and the Broad Institute has identified how the intestinal microbial population of newly diagnosed Crohn's disease patients differs from that of individuals free of inflammatory bowel disease.

New interdisciplinary center at MIT to focus on the microbiome and human health

This week, MIT and Massachusetts General Hospital (MGH) announce the launch of the Center for Microbiome Informatics and Therapeutics, a new interdisciplinary center dedicated to advancing the understanding of the microbiome’s role in human biology and harnessing this knowledge to develop treatments for related illnesses.

Researchers find link between microbiome, type 1 diabetes

Researchers from the Broad Institute, Massachusetts General Hospital, and the DIABIMMUNE Study Group have identified a connection between changes in gut microbiota and the onset of type 1 diabetes.

Gastroenterology Associates
55 Fruit Street
Boston, MA 02114-2696

Phone: 617-724-6007
Fax: 617-724-6832

Gastroenterology Associates
55 Fruit Street
Boston, MA 02114-2696

Phone: 617-724-6007
Fax: 617-724-6832


#3 in the nation for digestive care

U.S. News & World Report ranks Mass General gastroenterology third among U.S. hospitals.