John H. Stroger, Jr. Hospital Cashier's Office 1901 W. Harrison St. - Suite 1370 Chicago, IL 60612 Monday through Friday from 8:30 am to to 4:30 pm Provident Hospital of Cook County Patient Financial Services Department 500 E. 51st St. - Room 1003 Chicago, IL 60615 Monday through Friday from 8 am to 4 pm Questions About Your Bill.