| NPSA | normal pilosebaceous appartus |
|---|---|
| NPT | neoprecipitin test; nocturnal penile tumescence; normal pressure and temperature; sodium phosphate t... |
| NRBC | National Rare Blood Club; normal red blood cell; nucleated red blood cell |
| NRC | National Research Council; National Response Center; normal retinal correspondence; not routine care... |
| NREH | normal renin essential hypertension |