Publications:31
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James F Marion, MD
Gastroenterology
Feinstein IBD Clinical Center212-241-8100
View location detailsAbout Me
Language
English
Position
PROFESSOR | Medicine, Gastroenterology
Hospital Affiliations
- Mount Sinai Morningside
- Mount Sinai Beth Israel
- Mount Sinai Brooklyn
- Mount Sinai Queens
- The Mount Sinai Hospital
- Mount Sinai West
Clinical Focus
- Celiac Disease
- Colon Polyps
- Crohn's Disease
- Gastroenterology
- Inflammatory Bowel Disease
- Ulcerative Colitis
Video
Education
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
Certifications
American Board of Internal Medicine
Insurance Information
Accepted insurance may vary by the doctor’s office location. Please contact the office directly to obtain the most up-to-date insurance information.
- 1199 SEIU
- 32BJ Health Fund
- AETNA - Commercial
- AETNA - Medicare
- Anthem/Empire Blue Cross Blue Shield - Commercial
- Anthem/Empire Blue Cross Blue Shield - HealthPlus Medicaid
- CIGNA Healthcare
- Centivo
- Elderplan
- EmblemHealth - GHI-PPO
- EmblemHealth - HIP
- EmblemHealth - HIP-Medicare
- Horizon NJ
- Magnacare-Health Care
- Medicare - NJ
- Medicare - NY
- Multiplan PHCS
- Oscar
- Oxford - Freedom and Liberty
- United Health Care - Commercial
- United Health Care - Empire Plan
- United Health Care - Oxford Care
- United Health Care - UMR Top Tier
- VNSNY Choice Medicare
- VillageCareMax
- WellCare Health Plan
Physicians who provide services at hospitals and facilities in the Mount Sinai Health System might not participate in the same health plans as those Mount Sinai hospitals and facilities (even if the physicians are employed or contracted by those hospitals or facilities).
Information regarding insurance participation and billing by this physician may be found on this page, and can also be obtained by contacting this provider directly. Because physicians insurance participation can change, the insurance information on this page may not always be up-to-date. Please contact this physician directly to obtain the most up-to-date insurance information.
Insurance and health plan networks that the various Mount Sinai Health System hospitals and facilities participate in can be found on the Mount Sinai Health System website.
Publications
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
Patient Experience Star Ratings and Comments
The Patient Experience Star Rating reflects our patients’ perception of how well their Mount Sinai provider communicated with them during an office visit. The Star Rating is based on patient responses to three questions on a patient experience survey, a standardized questionnaire sent to verified patients and distributed by a third party vendor, Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score.
Care Provider’s Explanation
4.9 out of 5
Care Provider’s Concern
5 out of 5
Likelihood to Recommend Care Provider
5 out of 5
Dr Marion is an excellent doctor. As a patient with IBD problems most of my life. I am confident that Dr Marion always makes the best decision for both my health and emotional needs. Whether it's a face to face visit or virtual or through the patient portalI know that Dr Marion will always be there for me. Thank you.
Dr, Marion is simply the best doctor imaginable - from saving my life 26 years ago to his ongoing care, concern and consideration for my health. He's amazing and a gift to all his patients.
Been a patient of Dr Marion for over 25 yrs. Started with him when he was in private practice. Followed him to Mt Sinai because he is. Fantastic doctor. Recommended many people to him and they are thrilled with him.
Industry Relationships
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 2025 and/or 2026. 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- Johnson & Johnson
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.