Gil I. Ascunce, MD, is a board-certified gastroenterologist in New York City who treats patients from his main office in Manhattan on Madison Avenue, as well as in several non-profit community healthcare centers throughout the city. Dr. Ascunce has expertise in a wide range of gastrointestinal disorders and conditions including acid reflux, abdominal pain, constipation, and diarrhea. He also has special expertise in pancreatic diseases, removing large polyps, and Barrett's esophagus. He was born in Virginia to Cuban and Spanish immigrants, and he has native fluency in both Spanish and English. Dr. Ascunce completed his undergraduate and graduate studies at Georgetown University in Washington, D.C. At Georgetown, he excelled in academics and was also a decorated varsity athlete for the Hoyas’ Big East championship soccer team. After completing his undergraduate studies, Dr. Ascunce went on to earn a Master of Science in Physiology and Biophysics and then also earned his medical degree at the Georgetown University School of Medicine, where he graduated with honors. Dr. Ascunce then moved to New York for a residency in Internal Medicine at New York-Presbyterian Hospital-Weill Cornell Medical Center in Manhattan. After residency, he continued his medical education and completed a fellowship in Gastroenterology at the University of Miami/Jackson Memorial Hospital in South Florida. While training in gastroenterology, Dr. Ascunce developed a special interest in advanced endoscopic procedures. Finally, he returned to New York for an additional year of specialized training with an advanced therapeutic endoscopy fellowship at Beth Israel Medical Center in Manhattan. While he was once a full-time interventional endoscopist and in academic practice, his current practice emphasis is to treat and educate his patients and their community for all gastrointestinal diseases. Dr. Ascunce is an Assistant Clinical Professor of Medicine at the Icahn School of Medicine at Mount Sinai, and he teaches medical residents and gastroenterologists-in-training at Mount Sinai Beth Israel Medical Center. Dr. Ascunce has engaged in various research projects including basic science research, clinical pharmacology, and clinical research. He has published papers in several major gastroenterology journals and he has presented his research at several national conferences.


Years Experience: 15

Dr. Ascunce's Specialties

Dr. Ascunce's Education & Training

Medical School
Georgetown University School Of Medicine; Graduated 2004


  • Overall Rating

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    Explains conditions & treatments

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    Takes time to answer my questions

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    Provides follow-up as needed

Dr. Ascunce's Accepted Insurance

Please verify insurance information directly with your doctor's office as it may change frequently.

Insurance Plans

  • Aetna Choice POS II
  • Aetna Choice POS Open Access
  • Aetna Elect Choice EPO
  • Aetna HMO
  • Aetna Managed Choice POS Open Access

Dr. Ascunce's Office Information & Appointments


Gil I. Ascunce, MD

161 Madison Ave Rm 10SW
New York, NY 10016

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Tel: (212) 257-3446

Fax: Not Available

Accepting New Patients: Yes

Medicare Accepted: No

Medicaid Accepted: No

M 9:00 AM - 5:00 PM
T 9:00 AM - 5:00 PM
W 9:00 AM - 5:00 PM
T 9:00 AM - 5:00 PM
F 9:00 AM - 5:00 PM
S Closed
S Closed

Hospital Affiliations