Ramnik Joseph Xavier MD
Associate Professor, Medicine, Massachusetts General Hospital, Harvard Medical School
Join to View Full Profile
55 Fruit StBlk 4Boston, MA 02114
Phone+1 617-724-6007
Fax+1 617-724-6832
Dr. Xavier is on Doximity
As a Doximity member you'll join over two million verified healthcare professionals in a private, secure network.
- Gain access to free telehealth tools, such as our “call shielding” and one-way patient texting.
- Connect with colleagues in the same hospital or clinic.
- Read the latest clinical news, personalized to your specialty.
Education & Training
Mass General Brigham/Massachusetts General HospitalFellowship, Gastroenterology, 1992 - 1996- Mass General Brigham/Massachusetts General HospitalResidency, Internal Medicine, 1990 - 1992
- Mass General Brigham/Massachusetts General HospitalInternship, Internal Medicine, 1989 - 1990
University of Zimbabwe Huggins SOMClass of 1986
Certifications & Licensure
MA State Medical License 1991 - 2027
American Board of Internal Medicine Gastroenterology
Awards, Honors, & Recognition
- CMS Meaningful Use Stage 2 Certification EpicCare Ambulatory 2014 Certified EHR Suite, Epic Systems Corporation, 2014, 2016-2017
- CMS Meaningful Use Stage 2 Certification Longitudinal Medical Record, Partners Healthcare System, 2014, 2016-2017
- CMS Meaningful Use Stage 2 Certification OpTime Surgical 2014 Certified Module, Epic Systems Corporation, 2014, 2016-2017
Publications & Presentations
PubMed
- Microbiota-mediated induction of beige adipocytes in response to dietary cues.Takeshi Tanoue, Manabu Nagayama, Ayumi J A Roochana, Samuel Zimmerman, Orr Ashenberg
Nature. 2026-03-04 - Genome-wide association analyses of autoimmune hypothyroidism reveal autoimmune and thyroid-specific contributions and an inverse relationship with cancer risk.Mary Pat Reeve, Masahiro Kanai, Daniel B Graham, Juha Karjalainen, Shuang Luo
Nature Genetics. 2026-02-26 - Multi-modal skin atlas identifies a multicellular immune-stromal community associated with disrupted cornification and specific T cell expansion in atopic dermatitis.Evgenij Fiskin, Gökcen Eraslan, Maria B Alora-Palli, Tanvi Jain, Juan Manuel Leyva-Castillo
Nature Communications. 2026-02-25
Journal Articles
- Investigating Fatigue in IBD PatientsFrancis P Colizzo, Hamed Khalili, John J Garber, Ramnik J Xavier, Clinical Gastroenterology and Hepatology
- Temporal Development of the Gut Microbiome in Early Childhood from the TEDDY StudyRichard E Lloyd, Marian Rewers, William Hagopian, Ramnik J Xavier, Nature
- The Human Gut Microbiome in Early-Onset Type 1 Diabetes from the TEDDY StudyRamnik J Xavier, Marian J Rewers, William A Hagopian, Nature
Authored Content
- Investigating Fatigue in IBD PatientsFebruary 2020
Press Mentions
Congrats to the 44 Mass General Investigators Named to the Highly Cited Researchers List for 2022December 8th, 2022- Congrats to the 44 Mass General Investigators Named to Clarivate Analytics’ Highly Cited Researchers List for 2022November 22nd, 2022
- Bacterial BullseyeJuly 25th, 2022
Grant Support
- GPCR biology in autoimmunity: bridging genetics to structure to decipher mechanisms of diseaseMASSACHUSETTS GENERAL HOSPITAL2024–2029
- Spatial and temporal resolution to dissect cellular circuits controlling intestinal physiology, immunity, and inflammatory pathologiesBROAD INSTITUTE, INC.2023–2028
- Identification and Characterization of Microbial Metabolites in ImmunityBROAD INSTITUTE, INC.2022–2027
- Cardiovascular disease, metabolic syndrome, microbes and metabolites in FHSBROAD INSTITUTE, INC.2022–2026
- Determinants of inception of inflammation in inflammatory bowel diseasesMASSACHUSETTS GENERAL HOSPITAL2021–2026
Professional Memberships
- Fellow
Viewing the full profile is available to verified healthcare professionals only.
Find your profile and take control of your online presence:
