- National Home Health Care Corporation
- National Home Infusion Association
- National Hospice and Palliative Care Organization
- National Hospice Cooperative
- National Institute of Allergy and Infectious Diseases
- National Institute on Aging
- National Institute on Disability-Independent Living-and Rehabilitation Research
- National Institute on Retirement Security
- National Institutes of Health
- National Investment Center for Seniors Housing & Care
- National Law Employment Project
- National Law Review
- National Lutheran Communities & Services
- National Medtrans Network
- National Nurses United
- National Nursing & Rehab
- National PACE Association
- National Parkinson Foundation
- National Partnership for Hospice Innovation
- National Quality Forum