Aultman Medical Group General Surgery. Location: Aultman Medical Group General Surgery Aultman Massillon 2037 Wales Rd NE - Suite 110 Massillon, Ohio 44646. Patient Portal. Office Hours: Mon - Thu: 9 a.m. - 5 p.m. Fri: 9 a.m. - 4 p.m. Phone: 330-837-8300. Fax: 330-837-8111.