Advanced Diagnostic and Treatment Services Highlight New Endoscopy Suite at Westchester Medical Center Physicians specializing in gastroenterology and liver diseases are now performing endoscopic procedures that help diagnose conditions of the esophagus, stomach, colon, biliary tract and pancreas in a new endoscopy suite at Westchester Medical ...Find a Doctor‧Find a Location‧Medical Services‧Contact Us‧Advanced Physician Services‧Family Medicine.