James F Marion, MD
img_James F Marion
PROFESSOR | Medicine, Gastroenterology
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MD, Columbia University College of Physicians & Surgeons

Residency, Internal Medicine, New York Presbyterian Hospital/Columbia University

Residency, Internal Medicine, Columbia Presbyterian Medical Center

Fellowship, Gastroenterology, Mount Sinai Hospital


American Board of Internal Medicine

Selected Publications

Improved Smoking Cessation Rates in a Pharmacist-Led Program Embedded in an Inflammatory Bowel Disease Specialty Medical Home. Stacy Saithy Tse, Bruce E. Sands, Laurie Keefer, Benjamin L. Cohen, Elana Maser, Ryan C. Ungaro, James F. Marion, Jean Frédéric Colombel, Steven H. Itzkowitz, Jessica Gelman, Marla C. Dubinsky. Journal of Pharmacy Practice

Beyond the SCENIC route: updates in chromoendoscopy and dysplasia screening in patients with inflammatory bowel disease. Loren Galler Rabinowitz, Nikhil A. Kumta, James F. Marion. Gastrointestinal Endoscopy

Gut microbiota density influences host physiology and is shaped by host and microbial factors. Eduardo J. Contijoch, Graham J. Britton, Chao Yang, Ilaria Mogno, Zhihua Li, Ruby Ng, Sean R. Llewellyn, Sheela Hira, Crystal Johnson, Keren M. Rabinowitz, Revital Barkan, Iris Dotan, Robert P. Hirten, Shih Chen Fu, Yuying Luo, Nancy Yang, Tramy Luong, Philippe R. Labrias, Sergio Lira, Inga Peter, Ari Grinspan, Jose C. Clemente, Roman Kosoy, Seunghee Kim-Schulze, Xiaochen Qin, Anabella Castillo, Amanda Hurley, Ashish Atreja, Jason Rogers, Farah Fasihuddin, Merjona Saliaj, Amy Nolan, Pamela Reyes-Mercedes, Carina Rodriguez, Sarah Aly, Kenneth Santa-Cruz, Lauren Peters, Mayte Suárez-Fariñas, Ruiqi Huang, Ke Hao, Jun Zhu, Bin Zhang, Bojan Losic, Haritz Irizar, Won Min Song, Antonio Di Narzo, Wenhui Wang, Benjamin L. Cohen, Christopher Dimaio, David Greenwald, Steven Itzkowitz, Aimee Lucas, James Marion, Elana Maser, Ryan Ungaro, Steven Naymagon, Joshua Novak, Brijen Shah, Thomas Ullman, Peter Rubin, James George, Peter Legnani, Shannon E. Telesco, Joshua R. Friedman, Carrie Brodmerkel, Scott Plevy, Judy H. Cho, Jean Frederic Colombel, Eric E. Schadt, Carmen Argmann, Marla Dubinsky, Andrew Kasarskis, Bruce Sands, Jeremiah J. Faith. eLife

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James Marion, MD

Physicians and scientists on the faculty of the Icahn School of Medicine at Mount Sinai often interact with pharmaceutical, device, biotechnology companies, and other outside entities to improve patient care, develop new therapies and achieve scientific breakthroughs. In order to promote an ethical and transparent environment for conducting research, providing clinical care and teaching, Mount Sinai requires that salaried faculty inform the School of their outside financial relationships.

Below are financial relationships with industry reported by Dr. Marion during 2023 and/or 2024. Please note that this information may differ from information posted on corporate sites due to timing or classification differences.

Consulting or Other Professional Services Examples include, but are not limited to, committee participation, data safety monitoring board (DSMB) membership

  • Janssen Pharmaceuticals

Mount Sinai's faculty policies relating to faculty collaboration with industry are posted on our website. Patients may wish to ask their physician about the activities they perform for companies.