Gastroenterology

James Marion, MD

Professor | Medicine, Gastroenterology

New York, NY

James F. Marion, MD, is a Professor of Medicine in the Division of Gastroenterology at the Icahn School of Medicine at Mount Sinai in New York, NY. He specializes in inflammatory bowel disease (IBD), with particular expertise in Crohn's disease, ulcerative colitis, and related conditions such as colitis. Practicing at the Feinstein IBD Clinical Center and FPA Gastroenterology and IBD Center at Mount Sinai, Dr. Marion treats adult patients with complex IBD cases. His clinical approach emphasizes

...

30+

Years in Practice

Credentials

Board Certifications

Gastroenterology (American Board of Internal Medicine)
Internal Medicine (American Board of Internal Medicine)

Education & Training

Columbia University Vagelos College of Physicians and Surgeons — M.D., 1989
NewYork-Presbyterian Hospital / Columbia University Medical Center — Residency, Internal Medicine, 1989-1992
Icahn School of Medicine at Mount Sinai/Mount Sinai Hospital — Fellowship, Gastroenterology, 1993-1995

Peer Recognition

American Gastroenterological Association — Fellow (AGAF)
2009
Castle Connolly — Top Doctors: New York Metro Area
2010-2014 (5 years)
New York Magazine — Top Doctor
2021-2025 (5 years)
Super Doctors — Super Doctor
2023

Clinical Focus

Subspecialties

Inflammatory Bowel Disease

Conditions & Treatments

Inflammatory Bowel DiseaseCrohn's DiseaseUlcerative Colitis

Practice Details

Hospital Affiliations

Mount Sinai Morningside
Mount Sinai Beth Israel
Mount Sinai Brooklyn
Mount Sinai Queens
Mount Sinai West

Languages

English

Experience

30+ years in practice

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