Janie, Yang M.D.Attending PhysicianGastroenterology Internal Medicine Education: Columbia University College of Physicians and SurgeonsMain Office:212-996-6633 New York Gastroenterology Associates 32 Court St #1407 Brooklyn, NY 11201 Clinic Intersts:difficulty swallowing, abdominal pain, irregular bowel habits, abnormal liver function, and cancer prevention. Certification:Board Certified in Gastroenterology, Internal Medicine