- National Bureau of Economic Research
- National Caucus and Center on Black Aging
- National Center for Assisted Living
- National Center for Health Workforce Analysis
- National Center on Law and Elder Rights
- National Conference of State Legislatures
- National Consumer Voice for Quality Long-Term Care
- National Council on Aging
- National Fire Protection Association
- National Governors Association
- National Guard
- National Health Care Associates
- National Health Investors
- National Health Investors Inc.
- National Healthcare Corporation
- National Healthcare Development
- National Healthcare Safety Network
- National Hospice and Palliative Care Organization
- National Institute for CNA Excellence
- National Institute on Aging