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Ari Grinspan

  • ASSISTANT PROFESSOR Medicine, Gastroenterology
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  • American Board of Internal Medicine


  • MD, Albert Einstein College of Medicine

  • Residency, Internal Medicine
    New York Presbyterian - Weill Cornell Medical Center

  • Fellowship, Gastroenterology
    Mount Sinai Hospital


    Dr. Grinspan received his MD from the Albert Einstein College of Medicine in New York. He performed his internal medicine training at New York-Presbyterian Hospital. He then completed his fellowship in Gastroenterology at Mount Sinai Medical Center, where he remains as full time faculty. He is currently an Assistant Professor of Medicine in the Icahn School of Medicine at Mount Sinai. He 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.


  • 2013 - 2014
    Chief GI Fellow
    Mount Sinai Medical Center

  • 2011 -
    Daniel M. Libby MD Program Directors Award
    New York-Presbyterian Hospital

  • 2010 - 2011
    Assistant Chief Resident
    New York-Presbyterian Hospital

  • 2008 -
    Alpha Omega Alpha
    Albert Einstein College of Medicine

  • 2004 -
    Phi Beta Kappa
    University of Pennsylvania


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.

Industry Relationships

Physicians and scientists on the faculty of the Icahn School of Medicine at Mount Sinai often interact with pharmaceutical, device and biotechnology companies 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 relationships with such companies.

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 at Patients may wish to ask their physician about the activities they perform for companies.

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