Westerville 430 Altair Parkway Westerville, Ohio 43082 Ohio Gastro Office Suite 110 Doctor Appointments, Office Visits, & Hemorrhoid Banding Central Ohio Endo. Center Suite 120 Procedures (eg. colonoscopy, endoscopy) Main: 614-754-5500 Billing: 614-457-4220 Medical Records: 614-754-5455 Open PDF Directions