- National Association of Realtors
- National Association of Triads
- National Bureau of Economic Research
- National Business Group on Health
- National Center for Assisted Living
- National Center for Health Statistics
- National Church Residences
- National Coalition on Care Coordination
- National Council of State Boards of Nursing
- National Council on Aging
- National Council on Disability
- National Council on Medicaid Home Care
- National Council on Medicare Home Care
- National Domestic Workers Alliance
- National Employment Law Project
- National HealthCare Corporation
- National HME
- National Home Care Holdings
- National Home Health Care
- National Home Health Care Corp.