WESTERVILLE Office | Endoscopy Ohio Gastroenterology Group, Inc. 430 Altair Parkway, Suite 110 (Office) | Suite 120 (Endoscopy)Westerville, Ohio 43082 Practice Operation Manager: Emma Taylor-SagravesNurse Manager: Joanna Graham Main: 614-754-5500Billing: 614-457-4220Medical Records: 614-754-5455 Download PDF Directions