Online Bill Pay: Summa Health Medical Group. Use this page to pay bills for Summa Physicians Inc., physician medical services (866) 539-8277.Select Pay My Bills (top left) to begin the payment process. If your bill references Summa Health System or LabCare PLUS, and is for medical services charges incurred at a facility including Summa Akron City, Summa St. Thomas and Summa Barberton Hospitals ....