CHRISTUS SPOHN Medical Group. Since 1992,our Physician Hospital Organization (PHO) has provided a comprehensive provider network for local area self-funded employers in Corpus Christi and the 12 surrounding counties. CSHN includes all 6 CHRISTUS Spohn acute care facilities,Driscoll Children's Hospital,as well as several other facilities in the region. More than 700 Physicians,and 130 Ancillary Providers,in all specialties,make up the participating provider panel.