St. Charles Clinic Medical Group is part of the Sisters of St. Mary (SSM) Health Care System. It currently has 10 office locations throughout the St. Charles county area. It is affiliated with SSM St. Joseph Hospitals that are located in St. Charles, Wentzville and Lake St. Louis in St. Charles County. Dr. Tysen Petre and Dr. Glen Brothers are both Doctors of Osteopathy and provide family medicine practices at this location.