- Canuck Place Children's Hospice
- Canyon Home Health & Hospice
- Cap Doctor Associates
- Cape Cod Healthcare
- Capital Caring
- Capital Caring Health
- Capital City Hospice
- Capital One
- Capital One Finance Corp.
- Capital One Healthcare
- Capital Region Medical Center
- Caravan Health
- Cardinal Health
- Cardinal Health Specialty Solutions
- Care & Comfort
- Care Advantage
- Care Alternatives
- Care at Heart
- Care at Home
- Care Connection