Business Hours Rhea Medical Center's business office is located at the main entrance of the medical center. Hours are Monday through Friday, 8 a.m. to 4 p.m. Payments Payments for services should be mailed to the following address: Rhea Medical Center 9400 Rhea County Highway Dayton, TN 37321 Payment Arrangements All patient balances are due within ten (10) days of receipt of your.