Meet Dr. Mark Nyitray at Digestive Disease Care Serving New York Community
Dr. Mark Nyitray is a highly experienced, board-certified gastroenterologist at Digestive Disease Care, specializing in the diagnosis and treatment of gastrointestinal and hepatobiliary disorders. With over 29 years of expertise, he provides compassionate care to help patients manage complex digestive health issues. Contact us today for more information or request an appointment online. We have convenient locations to serve you in Babylon NY, East Setauket NY, Forest Hills NY, Jericho NY, Lake Success NY, Melville NY, Mineola NY, Massapequa NY, New Hyde Park NY and Riverhead NY.


Dr. Mark Nyitray
Dr. Mark Nyitray will be joining our practice starting Jan 5th, 2026.
Table of Contents:
What types of conditions does Dr. Mark Nyitray treat?
What is Dr. Mark Nyitray’s educational background?
What professional training has Dr. Mark Nyitray completed?
What are Dr. Mark Nyitray’s licensure and certifications?
What is Dr. Mark Nyitray’s professional experience?
What professional affiliations does Dr. Mark Nyitray hold?
What societies is Dr. Mark Nyitray a member of?
Dr. Mark Nyitray, a board-certified gastroenterologist with over 29 years of experience, specializes in diagnosing and managing gastrointestinal and hepatobiliary disorders. His expertise includes performing endoscopic procedures, colorectal cancer screening, and managing inflammatory bowel diseases.
Dr. Mark Nyitray earned his Doctor of Osteopathic Medicine (DO) degree from the New York College of Osteopathic Medicine (NYCOM) in 1993. He also holds a Bachelor of Science (BS) degree from SUNY Stony Brook, completed in 1989.
• Internship/Residency in Medicine: Saint Vincent’s Hospital & Medical Center, Manhattan, NY, from July 1993 to June 1996.
• Fellowship in Gastroenterology: Saint Vincent’s Hospital & Medical Center, Manhattan, NY, from July 1996 to June 1999.
Dr. Nyitray’s extensive training has equipped him with advanced skills in diagnosing and managing gastrointestinal disorders.
• Board Certified: American Board of Gastroenterology (ABIM), 1999 – Present.
• New York State Medical License: #203692.
• Private GI Medical Practice: July 1999 – Present.
• Privileges at Northwell Plainview Hospital: 1999 – Present.
• Skilled in endoscopy and colonoscopy.
• Diagnoses and manages inflammatory bowel disease (IBD), GERD, celiac disease, and chronic liver conditions.
• Member: American Gastroenterological Association (AGA).
• Member: American Society for Gastrointestinal Endoscopy.
• Member: American College of Gastroenterology (ACG).
• American College of Gastroenterology: Member #8220M.
• American College of Physicians: Member #01051964.
• American Gastroenterological Association: Member #178370.
• American Society for Gastrointestinal Endoscopy: Member #50853.



