- Cambia Health Foundation
- Cambia Health Solutions
- Cambia Palliative Care Center of Excellence
- Cambridge University Press
- Camellia Healthcare
- Canadian Home Care Association
- CancerNetwork
- Canon Healthcare
- Canon Hospice
- 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