- C&G Healthcare Management
- C3 Advisors
- CABS Nursing Home
- CAC Specialty
- Cain Brothers
- Cain Brothers & Co.
- Caledonia Senior Living
- 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 Aging
- California Department of General Services
- California Department of Health Care Services
- California Department of Public Health
- California Department of Veterans Affairs
- California Healthline
- California Pacific Medical Center
- Call9
- CalVet