- C3 Advisors
- CABS Nursing Home
- Cain Brothers
- California Advocates for Nursing Home Reform
- California Association of Health Facilities
- California Association of Health Workers
- California Association of Long Term Care Medicine
- California Department of Health Care Services
- California Department of Public Health
- California Healthline
- California Pacific Medical Center
- Call9
- CalVet
- cambia palliative care center of excellence
- Cambridge Health Alliance
- Cambridge Realty Capital Companies
- Canal Street Beat
- Cantata Health
- Capital Funding
- Capital Funding Group
