Gastroenterologist
161 Madison Avenue
RM 10 SW
New York, NY
10016
Top reviews
Dr. Ascunce is not only incredibly knowledgeable, but also caring and responsive. He explains everything and has the patient share in decision making about treatment. In 2025 he was voted one of the top doctors by his peers, gettiShow moreng an award from the New York Times. In a previous contact, when the insurance company denied permission for an essential treatment, Dr. Asunce acted quickly, possibly saving my life. He and his staff respond quickly to questions and follow up to assure treatment is effective. I give him my highest recommendation
Dr. Ascunce is awesome. He’s practical, communicates in a way that’s easy for his patients to understand, and has helped me find a medicine that works better for my symptoms and my lifestyle. I couldn’t recommend him more.
Meet Dr. Ascunce
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.
Acid Reflux
Colitis
Colon Cancer Screening
Colonoscopy
Diarrhea
Rectal Bleeding
Heartburn
Pancreatitis
Constipation
Irritable Bowel Syndrome (IBS)
Location
Gil I. Ascunce, MD
161 Madison Avenue
RM 10 SW
New York, NY, 10016
More About Dr. Gil Ascunce, MD
Practice
Specialties
Insurance
NPI Number
1023265428
Provider's Gender
Male
Reviews
Dr Ascunce was very kind and cleared up all my concerns
Not only a great professional, but also one of the most empathetic and humane doctors I’ve ever met.
He explained everything to me .
True caring doctor who cares to give his time to listen and understand thoroughly what the patient is saying. I feel I have finally found the one doctor who is going to cure me completely.
Nice dr. End put attention about of the problem. I am recommending.
Very thorough, yet down to earth- made an uncomfortable feeling seem normal and provided detailed insight. Very grateful for my experience and highly recommend to everyone!
Dr Ascunce is a good listener and determining which treatment is right for your condition.
Dr. Ascunce was awesome! He really took his time, explained everything clearly, and made me feel comfortable the whole visit. Definitely recommend!
Dr. Ascunce, is polite and professional. Great bed side manners. He listens to concerns without making you feel rushed. Staff are friendly and polite.
Dr. Ascunce is always great. He never rushes and makes sure to answer questions clearly and thoroughly. He’s professional and friendly and so is his office staff.
Dr. Ascunce is not only incredibly knowledgeable, but also caring and responsive. He explains everything and has the patient share in decision making about treatment. In 2025 he was voted one of the top doctors by his peers, getting an award from the New York Times. In a previous contact, when the insurance company denied permission for an essential treatment, Dr. Asunce acted quickly, possibly saving my life. He and his staff respond quickly to questions and follow up to assure treatment is effective. I give him my highest recommendation
Excellent. Very professional, courteous, knowledgeable, good listener. Every thing one needs in a doctor. Left feeling “healed”.
Nice guy, very knowledgeable, and took time to explain everything
The Doctor and his staff are great!
Thorough and patient physician and a very nice guy.
Dr. Ascunce is awesome. He’s practical, communicates in a way that’s easy for his patients to understand, and has helped me find a medicine that works better for my symptoms and my lifestyle. I couldn’t recommend him more.
Professional, courteous and very competent
Dr Ascunce Is good with listening to issues, and Is particularly helpful with considering various treatment options as well as other potential causes of a symptom or condition instead of having a cookie cutter approach.
Dr.Gil is very thorough and I’m beyond grateful to be a patient of his. I believe I’m in great hands and would highly recommend him to anyone. He’s the best.
10/10 best GI doctor in NYC. So empathetic, kind, understanding, and judgement free.
Kind, warm, and helpful staff and doctor. I highly recommend.
Dr. Ascunce and his team are great. I appreciate the care I have received at this office and how they follow up to ensure I get my medications and all my needs addressed.
I was very pleased with the visit! !!! The staff was very nice and polite , and Dr . Ascunce is wonderful ! He takes his time to explain the issue and you don’t feel rushed! I would absolutely recommend him to all my friends . Very happy that I met him!!
It was indeed a great pleasure to get to know Dr. Ascunce, these days, it is rare to find a physician to take time to explain all items of concern so well and so complete. And, follow up on his recommendations so aggressively; BRAVO.
Dr Ascunce is a knowledgeable physician who cares about his patients! He spends a considerable amount of time discussing your medical issues at length! I have been seeing him as a patient for many years and highly recommend him!
The accommondation and surrounding environment is very pleasant. Also, the hospitality was also impressive. Thanks
Dr. Ascunce has the extremely rare mix, in the medical field, of outstanding competence and human touch. I would recommend him to all my family members.
Caring knowledgeable professional
Dr. Ascunce was very reassuring to talk to.
I’m very grateful to have a Doctor so professional and dedicated to helping people. The knowledge that he has over comes experience but awareness of the past. This gift is special and I am very thankful that he is my doctor.
