Riverdale Gastroenterology & Liver Diseases (RGLD) specializes in the treatment of gastrointestinal and liver diseases. We are committed to delivering the highest quality of care in the fields of gastroenterology and hepatology. RGLD is the premier resource of the Riverdale area of the Bronx, with over 28 years of experience providing diagnosis and treatment of gastrointestinal and liver problems. Our physicians are experts at performing gastrointestinal endoscopy as well as Esophagastro-duodenoscopy (EGD), colonoscopy, capsule endoscopy and Endoscopic Retrograde Cholangiopancreatography (ERCP). We provide consultations in our main Riverdale office, various Bronx satellite offices, and at Montefiore Medical Center. Our procedures are performed at: The Advanced Endoscopy Center (accredited by the Accreditation Association for Ambulatory Health Care (AAAHC) At our Riverdale office, accredited by the American Association for Accreditation of Ambulatory Surgery Facilities (AAAASF) Montefiore Medical Center, accredited by The Joint Commission (TJC) The physicians of Riverdale Gastroenterology & Liver Diseases, Isadore P. Gutwein, MD; Robert A. Sable, MD; Michael S. Ader, MD; David F. Stein, MD. Daniel S. Reich, MD and Jeremy M. Gutwein, MD serve patients from areas including Northern Manhattan, the Bronx and Lower Westchester.