| NPA | National Pharmaceutical Association; National Pituitary Agency; near point accommodation; Nurse Prac... |
|---|---|
| NR | do not repeat [Lat. non repetatur]; nerve root; neural retina; neutral red; noise reduction; nonreac... |
| NSNA | National Student Nurse Association |
| NTA | natural thymocytotoxic autoantibody; nitrilotriacetic acid; Nurse Training Act |
| OCN | oculomotor nucleus; oncology certified nurse |