- Citizens Baptist Medical Center
- Citizens Medical Center
- Citizens Medical Center
- Citizens Medical Center
- Citizens Memorial Hospital
- Citrus Main Center & Citrus Med
- City of Hope Atlanta cancer hospital
- City of Hope Chicago
- City of Hope Phoenix
- Claiborne County Medical Center
- Claiborne Medical Center
- Claiborne Memorial Medical Center
- Clara Barton Medical Center
- Clara Maass Medical Center
- Clarinda Regional Health Center
- Clarion Hospital
- Clarion Psychiatric Center
- Clarity Child Guidance Center
- Clarke County Hospital
- Clark Fork Valley Hospital
- Clarks Summit State Hospital
- Claxton-Hepburn Medical Center
- Clay County Hospital
- Clay County Hospital
- Clay County Medical Center
- Clay County Memorial Hospital
- Clear Lake Campus Hospital Pediatric Services
- ClearSky Rehabilitation Hospital of Avondale
- ClearSky Rehabilitation Hospital of Baytown
- ClearSky Rehabilitation Hospital of Elwood-St Joseph