| Abbreviation | Term(s) |
| NA | Not applicable |
| NBS | Normal bowel sounds |
| NEC | Not elsewhere classified |
| NED | No evidence of disease |
| NEG or - | Negative |
| NEURO | Neurology |
| NL | Normal |
| NOS | Not otherwise specified |
| NR | Not recorded |
| NR | Not reportable |
| NSF | No significant findings |
| NTP | Normal temperature and pressure |
| N&V | Nausea and vomiting |
| NVD | Neck vein distention |