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Effective Monday, September 29, 2025, Outpatient Physical Therapy patients will be seen at 244 Westchester Avenue, Suite 217, West Harrison, NY 10602

If you have any questions, please call us at 914.681.1116

We appreciate your understanding.

Provider directory

Alissa J. Mark, MD

  • Internal Medicine
  • Gastroenterology
  • Accepting new patients
  • 914.607.5830
Gender Female
Languages English
Board certification

Internal Medicine, Gastroenterology

Medical school Temple Univ School of Medicine
Residency Montefiore Medical Center
Fellowship State University of New York at Stony Brook Hosp
Specialty

Gastroenterology