Dr. Alissa Jill Mark, MD

Dr. Alissa Mark is a gastroenterologist with expertise in internal medicine, bringing 25 years of clinical experience to her practice. She earned her medical degree from Lewis Katz School of Medicine at Temple University, where she developed her foundation in comprehensive patient care. Her dual specialization allows her to address both complex digestive disorders and general internal medicine concerns with extensive knowledge. Dr. Mark is fluent in Spanish and English, enabling her to serve diverse patient populations.

Dr. Mark maintains affiliations with Greenwich Hospital and practices at locations in Purchase, New York, Greenwich, Connecticut, and the Bronx, New York. She specializes in treating common digestive conditions such as colon polyps, hemorrhoids, and diverticular disease. Her procedural expertise includes performing colonoscopies and lower gastrointestinal endoscopy to diagnose and monitor intestinal health. Patients have given her an average rating of 3.5 on Vitals, …reflecting her commitment to digestive health care.