- Consulate Health Care
- Contemporary Healthcare Capital
- Contessa Health
- Continental Springs LLC
- Continuing Care Leadership Coalition
- Continuing Healthcare of Niles
- Continuing Healthcare Solutions
- Convergence Center for Policy Resolution
- Conway Lakes
- Copernicus Inc.
- CORE Analytics
- Core Health
- CoreCare
- Cornell University
- Cornerstone Care Option
- Cornerstone Healthcare
- Cornerstone Nursing and Rehab Center
- Correlation Ventures
- Cottonwood Healthcare
- Courage Kenny Rehabilitation Institute