Ari Grinspan, MD
img_Ari Grinspan
ASSOCIATE PROFESSOR | Medicine, Gastroenterology
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Gastroenterology, Internal Medicine
Fecal Microbiota Transplantation (FMT)
Dr. Grinspan has pioneered the Fecal Microbiota Transplantation (FMT) program at Mount Sinai to treat recurrent and refractory Clostridium difficile infection.

MD, Yeshiva University Albert Einstein College of Medicine

Residency, Internal Medicine, New York Presbyterian Hospital-Weill Cornell

Fellowship, Gastroenterology, Mount Sinai Hospital


American Board of Internal Medicine


Chief GI Fellow

Mount Sinai Medical Center


Daniel M. Libby MD Program Directors Award

New York-Presbyterian Hospital


Assistant Chief Resident

New York-Presbyterian Hospital


Alpha Omega Alpha

Albert Einstein College of Medicine


Phi Beta Kappa

University of Pennsylvania

Fecal Microbiota Transplantation
The Power of Poop — AMNH SciCafe

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. Grinspan 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

  • Ferring Pharmaceuticals A/S
  • Aimmune Therapeutics, Inc.

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.