| Abbreviation | Definition |
|---|---|
| NAF | Nipple Aspirate Fluid |
| NAI | No Acute Infection |
| NAM | No Apparent Memories |
| NAO | Nasal Airway Obstruction |
| NAP | No Appointments Please |
| NAR | Narcotic |
| NAR | Nasty Anal Rash |
| NAR | No Apparent Reaction |
| NAS | Neonatal Abstinence Syndrome |
| NASF | Neurally Augmented Sexual Function |
| NASH | Non Alcoholic Steato Hepatitis |
| NATP | Neonatal Alloimmune Thrombocytopenic Purpura |
| NAZ | Nasal |
| NB | New Born |
| NB | Newborn |
| NB | Nose Bleed |
| NBD | Nervous Break Down |
| NBI | No bone injury |
| NBM | Nothing by mouth |
| NBM | Nucleus Basalis of Meynert |