Gastroenterology Care
With Offices in Manhattan

Patients Can Make Payments Through the Portal Now.

In-Office Infusion is available. Click for more info.

Welcome to Vanguard Gastroenterology Clinic Located in New York, NY

Welcome to Vanguard Gastroenterology Clinic Located in New York, NY

Visit us at a location near you. For more information, please call us or book an appointment online. We serve patients from New York NY, Queens NY, Brooklyn NY, The Bronx NY, East Elmhurst NY, Ridgewood NY, Valley Stream NY, and Staten Island NY.

Patients Can Make Payments Through the Portal Now.

In-Office Infusion is available. Click for more info.

Our Physicians

Our doctors and staff are devoted to our patients and to the commitment of providing quality patient care on all levels

Our Physicians

Our doctors and staff are devoted to our patients and to the commitment of providing quality patient care on all levels

Vanguard GI: Recognizing Excellence

Vanguard GI: Recognizing Excellence

New York Magazine Best Doctors 2020

Inessa Khaykis MD
James Salik MD
Alex Sherman MD

NYU Grossman School of Medicine – Promotion to Clinical Professor of Medicine

Alex Sherman MD

“Vanguard to Your Door” – Complimentary Covid 19 testing of NYC Firefighters

Jonathan Cohen MD
Inessa Khaykis MD

Castle Connolly Top Doctors

Inessa Khaykis, M.D.
Exceptional Women in Medicine, New York Magazine Top Doctors, Top Doctors New York Metro Area.

James M. Salik, M.D.
New York Magazine Top Doctors, Top Doctors New York Metro Area.

Edward M. Brettholz, M.D.
New York Magazine Top Doctors, Top Doctors New York Metro Area.

Caterina Oneto, M.D.
New York Magazine Top Doctors, Top Doctors New York Metro Area.

Alex Sherman, M.D.
New York Magazine Top Doctors, Top Doctors New York Metro Area.

Jonathan Cohen, M.D.
New York Magazine Top Doctors, Top Doctors New York Metro Area, America’s Top Doctors.

Vanguard Gastroenterology New York City, NY
Vanguard Gastroenterology New York City, NY

PATIENT REVIEWS & FEEDBACK

PATIENT REVIEWS & FEEDBACK

Dr Cohen has been my GI dr for some years now. He is an excellent clinician, knowledgeable, timely, thorough and concerned. I highly recommend him to anyone with GI issues.

Vanguard Gastroenterology New York City, NY

Deborah W

My wife and I had colonoscopy screenings with Dr. Friedlander. He is a warm human being and excellent physician. He and his staff made the experience very comfortable. Many thanks!

Vanguard Gastroenterology New York City, NY

Dino D.

Dr Brettholz is a Great doctor. He definitely knows what he’s talking about. Very experienced and makes you feel very comfortable. Highly recommended!

Vanguard Gastroenterology New York City, NY

Ioannis S.