- Choice Homecare
- Choice Homecare of Texas
- Christiana Care Health System
- ChristianaCare
- CHRISTUS Good Shepherd Health System
- CHRISTUS Health
- CHRISTUS Hospice
- CHRISTUS Santa Rosa Hospice
- Cigna
- Cimarron Healthcare Capital
- Cincinnati Chidren's Hospital
- Cipher Health
- Circa Health
- Citi
- Citizens Who Care
- Citus Health
- CitusHealth
- City of Hope
- City of Hope Medical Center
- ClaimsXten