- CareOne
- Carilion Clinic
- CarolinaEast Health System
- Caromont Health System
- Carondelet Health Network
- Carrus Hospitals
- Carson Tahoe Health
- Catawba Valley Medical Center
- Catholic Health
- Catholic Health Initiatives
- Catholic Health Services
- Catholic Health Services of Long Island
- Cayuga Medical Center
- CCH & JTCH Management Team
- Cedars-Sinai Health System
- CenterPointe Hospitals
- Centerstone
- CentraCare Health System
- Centra Health
- Central Maine Healthcare Corporation
- Central Valley Doctors Health System
- CGH Medical Center
- CharterCARE Health Partners
- Chesapeake Regional Medical Center
- Cheyenne Regional
- CHI Health
- Children National Hospital
- Childrens Health
- Childrens Healthcare of Atlanta
- Childrens Hospital and Health System