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Ari Grinspan, MD
Gastroenterology
Feinstein IBD Clinical Center212-241-8100
View location detailsAbout Me
Ari Grinspan, MD, is an Assistant Professor in the Department of Medicine, Division of Gastroenterology and the Director of the GI Microbial Therapeutics. He received his medical degree from the Albert Einstein College of Medicine in New York and completed his Internal Medicine training at New York-Presbyterian Hospital. He completed his fellowship in Gastroenterology at Mount Sinai Medical Center, where he remains as full-time faculty.
Dr. Grinspan pioneered the Fecal Microbiota Transplant (FMT) program to treat recurrent and refractory Clostridium difficile infection at Mount Sinai, which has developed into a referral center for the tri-state area. His research focuses on exploring the mechanism and clinical utility of FMT in Clostridium difficile infection and Inflammatory Bowel Disease.
For more information on FMT, please read Dr. Grinspan's articles: Guest commentary: The exciting future of fecal microbiota transplant and Fecal Microbiota Transplantation for Inflammatory Bowel Disease,
Language
English
Position
ASSOCIATE 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
- Acid Reflux / Heartburn
- Antibiotic-Associated Colitis-C Difficile
- Blood in Stool
- Colon Polyps
- Colorectal Cancer
- Constipation
- Crohn's Disease
- Diarrhea
- Dyspepsia
- Gastritis
- Gastroenterology
- Hemorrhoids
- Inflammatory Bowel Disease
- Iron-Deficiency Anemia
- Irritable Bowel Syndrome
- Nausea and Vomiting
- Peptic Ulcer
- Stomach Pain
- Ulcerative Colitis
Video
Education
MD, Albert Einstein College of Medicine
Residency, Internal Medicine
New York Presbyterian Hospital-Weill Cornell
Fellowship, Gastroenterology
Mount Sinai Hospital
Certifications
American Board of Internal Medicine
Awards
2013
Chief GI Fellow
Mount Sinai Medical Center
2011
Daniel M. Libby MD Program Directors Award
New York-Presbyterian Hospital
2010
Assistant Chief Resident
New York-Presbyterian Hospital
2008
Alpha Omega Alpha
Albert Einstein College of Medicine
2004
Phi Beta Kappa
University of Pennsylvania
Research
Dr. Grinspan has pioneered the Fecal Microbiota Transplantation (FMT) program at Mount Sinai to treat recurrent and refractory Clostridium difficile infection.
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
- AETNA - Commercial
- AETNA - Medicare
- CIGNA Healthcare
- Centivo
- EmblemHealth - GHI-PPO
- EmblemHealth - HIP
- EmblemHealth - HIP-Medicare
- Empire Blue Cross Blue Shield - Commercial/Exchange
- Empire Blue Cross Blue Shield - Medicare
- Horizon NJ
- Magnacare-Health Care
- Medicare - NJ
- Medicare - NY
- Metroplus
- Multiplan PHCS
- Oscar
- Oxford - Freedom and Liberty
- Partners Health Plan
- Senior Whole Health
- United Health Care - Commercial
- United Health Care - Empire Plan
- United Health Care - Oxford Care
- United Health Care - 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
- Author Correction: Gut microbiota strain richness is species specific and affects engraftment (Nature, (2025), 637, 8045, (422-429), 10.1038/s41586-024-08242-x). Alice Chen-Liaw, Varun Aggarwala, Ilaria Mogno, Craig Haifer, Zhihua Li, Joseph Eggers, Drew Helmus, Amy Hart, Jan Wehkamp, Esi S.N. Lamousé-Smith, Robert L. Kerby, Federico E. Rey, Jean Frédéric Colombel, Michael A. Kamm, Bernat Olle, Jason M. Norman, Rajita Menon, Andrea R. Watson, Emily Crossette, Elisabeth M. Terveer, Josbert J. Keller, Thomas J. Borody, Ari Grinspan, Sudarshan Paramsothy, Nadeem O. Kaakoush, Marla C. Dubinsky, Jeremiah J. Faith. Nature
- Safety and Tolerability of CP101, a Full-Spectrum, Oral Microbiome Therapeutic for the Prevention of Recurrent Clostridioides difficile Infection: A Phase 2 Randomized Controlled Trial. Jessica R. Allegretti, Colleen R. Kelly, Thomas Louie, Monika Fischer, Susy Hota, Bharat Misra, Nick W. Van Hise, Eugene Yen, Jeffrey S. Bullock, Michael Silverman, Ian Davis, Sarah K. McGill, Darrell S. Pardi, Robert Orenstein, Ari Grinspan, Najwa El-Nachef, Paul Feuerstadt, Thomas J. Borody, Sahil Khanna, Shrish Budree, Zain Kassam. Gastroenterology
- Gut microbiota strain richness is species specific and affects engraftment. Alice Chen-Liaw, Varun Aggarwala, Ilaria Mogno, Craig Haifer, Zhihua Li, Joseph Eggers, Drew Helmus, Amy Hart, Jan Wehkamp, Esi S.N. Lamousé-Smith, Robert L. Kerby, Federico E. Rey, Jean Frédéric Colombel, Michael A. Kamm, Bernat Olle, Jason M. Norman, Rajita Menon, Andrea R. Watson, Emily Crossett, Elisabeth M. Terveer, Josbert J. Keller, Thomas J. Borody, Ari Grinspan, Sudarshan Paramsothy, Nadeem O. Kaakoush, Marla C. Dubinsky, Jeremiah J. Faith. Nature
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
5 out of 5
Care Provider’s Concern
4.9 out of 5
Likelihood to Recommend Care Provider
4.9 out of 5
Dr. Grinspan made me feel heard and understood. He also made me feel comfortable contacting him if necessary. He made very good recommendations for me regarding other services at the hospital.
Enjoyable and informative. Personable. Thanks
Dr. Ari Grinspan is a very caring and dedicated doctor. He listens intently to what is being said.
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.
Dr. Grinspan has not yet completed reporting of Industry relationships.
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.