| NAD | Not Actually Done | - | NASA |
| NARS | Not A Rocket Scientist (low IQ) | - | NASA |
| NETMA | Nobody Ever Tells Me Anything (generally A Doctor's Gripe On A Patient's Chart) | - | NASA |
| NFR | Not For Resuscitation; Used On Elderly Patients' Charts Where The DNR (Do Not Resuscitate) Instruction Is Without The Knowledge Of The Patient Themselves Or Their Family | - | NASA |
| NFS | Neuro-faecal Syndrome - Sh*t For Brains | - | NASA |
| NGMI | Not Going To Make It | - | NASA |
| NKDA | Not Known, Didn't Ask | - | NASA |
| NLPR | No Longer Playing Records (dying) | - | NASA |
| NPS | New Parent Syndrome | - | NASA |
| NQR | Not Quite Right | - | NASA |
| NQRITH | Not Quite Right In The Head | - | NASA |
| NSA | Non-Standard Appearance (what A FLK Grows Into) | - | NASA |
| NWB | Negative Wallet Biopsy - (US) Patient Transferred To Cheaper Hospital Because They Have No Insurance / Funds | - | NASA |
