| NAHSA | National Association for Hearing and Speech Action |
|---|---|
| NAHSE | National Association of Health Services Executives |
| NAHU | National Association of Health Underwriters |
| NAHUC | National Association of Health Unit Clerks-Coordinators |
| NAIC | National Association of Insurance Commissioners |
| NIHSS | National Institute of Health Stroke Scale |
|---|---|
| NIMH | National Institute of Mental Health |
| NINDS | National Institute of Neurological Disorders and Stroke |
| NIOSH | National Institute of Occupational Safety and Health |
| NIST | National Institute of Standards and Technology |