| Abbreviation | Definition |
|---|---|
| NAMI | Naval Aerospace Medicine Institute |
| NAPH | National Association of Public Hospitals |
| NAPH | National Association of Public Hospitals and Health Systems |
| NAS | No Abnormality Seen |
| NASSA | Noradrenergic And Specific Serotonergic Antidepressant |
| NAT | Nutrition Analysis Tool |
| NATT | New Approaches to Target Tuberculosis |
| NAUH | National Association of Urban Hospitals |
| NBCRS | National Burn Center Reporting System |
| NBGH | New Britain General Hospital |
| NBGH | North Bay General Hospital |
| NBHD | North Broward Hospital District |
| NBIMC | Naval Bloodborne Infection Management Center |
| NC/AT | NormoCephalic/ATraumatic |
| NCAH | Non-classical Congenital Adrenal Hyperplasia |
| NCAH | North Carolina Arts for Health |
| NCAH | North County Animal Hospital |
| NCH | Naples Community Hospital |
| NCH | Nationwide Children's Hospital |
| NCH | Northwest Community Healthcare |