Located on Upper Park Avenue, East Side G.I. comprises board certified gastroenterologists Dr. Ron Palmon and Dr. Peter K. Chang.

We specialize in gastroenterology and liver disease, including acid reflux, abdominal pain, irritable bowel syndrome, constipation, diarrhea, swallowing disorders, gastrointestinal bleeding, colon polyps and cancer, Crohn's disease and ulcerative colitis, hepatitis, gallstones, and diseases of the bile duct and pancreas. We perform procedures such as colonoscopy and upper endoscopy with an anesthesiologist.

Our Philosophy

In recent years, many private practices have been purchased by large hospitals or multi-specialty groups.  Too often this leads to impersonal service, difficulty contacting your physician, as well as increased charges.  Drs. Chang and Palmon maintain a traditional small-office setting on Park Avenue with a stable and small set of staff members.  We respond to phone calls personally and pride ourselves on providing the highest level of service to our patients.  We value our patients greatly and look forward to forming a lifelong relationship.  Many of our patients are referred by their friends, colleagues, and family members who have had a positive experience with us.


Dr. Palmon: Aetna, Cigna, Oxford (Freedom, Liberty, Metro), United, The Empire Plan, GHI, HIP, Emblem, 1199, Fidelis, Medicare

Dr. Chang: Aetna, Cigna, Oxford (Freedom only), United

Please note that the office is currently an out-of-network provider for Empire Blue Cross except for the Empire Blue Cross plan for Mount Sinai Hospital employees for which we are in-network.


Office visits for existing patients: there will be a $75 charge for any no-show or cancellation within 1 business day.

Procedures (endoscopy or colonoscopy) for any patient: $250 charge for any no-show or cancellation within 1 business day.

New patients: If a new patient visit is a no-show or a cancellation within 1 business day, a credit card will be required to secure another appointment with a $250 charge for another no-show or cancellation within 24 hours.




(212) 427–9888


(212) 427-2394


1049 Park Avenue
at 87th Street
Suite 1-C
New York, NY 10028


M–F 8a–4:30p


Ron Palmon


Dr. Ron Palmon graduated with honors from Brown University, after which he attended New York University School of Medicine.  He stayed at NYU for a residency and chief residency in Internal Medicine which included training at Bellevue Hospital, NYU Hospital (Tisch), Manhattan VA, and Memorial Sloan Kettering.  After residency, he completed the prestigious Gastroenterology fellowship at Mount Sinai Hospital in New York. 

Dr. Palmon has published numerous journal articles and book chapters in diverse topics such as inflammatory bowel disease, liver disease and colonoscopy.  He has lectured and presented research at both national and international conferences. He maintains a teaching appointment at Mount Sinai School of Medicine where he is actively involved with teaching gastroenterology trainees. Dr. Palmon has the honor of being selected as one of New York Magazine's top gastroenterologists for 2017.

When he is not working, Dr. Palmon enjoys cycling, skiing, guitar, and playing with his labradoodle Barkley Pluto. 

Board Certifications

American Board of Internal Medicine

Gastroenterology (Internal Medicine)


New York University  M.D.

Brown University  A.B.

New York University Medical Center, Residency

New York University Medical Center, Chief Residency  

The Mount Sinai Hospital, Fellowship


Peter Chang


Dr. Peter K. Chang grew up in New York and attended Stuyvesant High School.  He graduated with honors from New York University, after which he attended the Mount Sinai School of Medicine.  He remained at Mt. Sinai Hospital for his residency and was selected to be Chief Resident in Medicine.  He also completed his fellowship in gastroenterology at Mt. Sinai Hospital and was selected to be Chief Fellow in Gastroenterology.  

Dr. Chang has received numerous awards.  He is a two time winner of the Consultant of the year award from the Geriatrics Department at Mt. Sinai.  Dr. Chang is actively involved in the teaching of medical students, residents and fellows.  He has received numerous awards for his teaching from the Mt. Sinai Division of Gastroenterology and Department of Medicine.  Dr. Chang was listed as one of New York Magazine's top gastroenterologists for 2013, 2014 and 2015.

Board Certifications


American Board of Internal Medicine


Mount Sinai Sch. of Medicine CUNY, MD 

Mount Sinai Hospital, Residency, Internal Medicine

Mount Sinai Hospital, Fellowship, Gastroenterology


The Doctor is a true professional as are all on his staff. I was shown into his office on time. The Doctor asked many questions, all pertinent, and then explained in detail the procedure that he recommended for me and the reasons for it. We also discussed medication options, benefits and risks. Very thorough and inspired a great deal of confidence in his abilities. Thank you Doctor and Staff.
Everyone on staff was professional and courteous and nice, and I waited just a few minutes to be see. Dr. Palmon was great, professional and knowledgeable —he explained everything simply and in detail to me, he wanted to hear why I was there, what concerned me, offered advice, took into account family history, and recommended tests he thought would be useful and advised against overtesting. All in all everyone was great.

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