You can also set up text-to-pay through your online account! Pay by phone- Call Patient Accounts at (563) 589-4030 between 7:30 a.m. and 5:00 p.m. Monday - Friday to pay with a credit card. Pay by mail- Send your payment to Grand River Medical Group, Patient Accounts, 1515 Delhi Street, Suite 100, Dubuque, IA 52001..