Denise Nassisi

Denise Nassisi, MD

  • ASSOCIATE PROFESSOR | Emergency Medicine
  • ASSOCIATE PROFESSOR | Medicine, General Internal Medicine


Emergency Medicine, Internal Medicine

Denise Nassisi, MD, FACEP is an Associate Professor in the Departments of Medicine and Emergency Medicine at Mount Sinai. She is currently the Associate Director of the Emergency Department (ED) at Mount Sinai, serving as the Director of ED Performance Improvement, as well as Director of the Geriatric ED and the Clinical Trials Director. Dr. Nassisi received a B.S. in biochemistry from Binghamton University and received her M.D. from SUNY Stony Brook where she was inducted into the Alpha Omega Alpha Honor Society. She trained at Jacobi Hospital and Mount Sinai Hospital and is board-certified in both Emergency Medicine and Internal Medicine. She was granted Fellowship in Mount Sinai’s Institute for Medical Education, served on the Mount Sinai School of Medicine CME committee, and has contributed to the National Board of Medical Examiners United States Medical Licensing Exam. She has precepted many students and residents in the ED and developed evidence-based clinical guidelines. She has served for many years on the Mount Sinai IRB, served as reviewer for the Empire Clinical Research Investigator Program, and has successfully completed numerous industry-sponsored clinical trials. Currently she is an investigator on the CMMS Innovations Grant: GEDI WISE Geriatric emergency department innovations in care through workforce, informatics, and structural enhancements.

Regional / National Committees / Advisory Boards:


NY ACEP Research Committee

NY County Elder Fatality Review Team



American Board of Emergency Medicine

American Board of Internal Medicine

Clinical Focus


MD, S.U.N.Y. at Stony Brook Sch. of Med

Residency, Internal Medicine, Bronx Municipal Hospital Center

Residency, Internal Medicine, Mount Sinai Hospital

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.