| NCPIM | National Commission to Prevent Infant Mortality |
|---|---|
| NJPC | National Joint Practice Commission |
| NK | Commission on [Anatomical] Nomenclature [Ger. Nomenklatur Kommission]; natural killer [cell]; neurok... |
| NRC | National Research Council; National Response Center; normal retinal correspondence; not routine care... |
| ProPAC | Prospective Payment Assessment Commission |