| NII | National Information Infrastructure; National Insurance Institute |
|---|---|
| NMA | National Malaria Association; National Medical Association; neurogenic muscular atrophy; N-nitroso-N... |
| NMF | N-methylformamide; National Medical Fellowship; National Migraine Foundation; nonmigrating fraction |
| NOF | National Osteopathic Foundation; National Osteoporosis Foundation |
| NPA | National Pharmaceutical Association; National Pituitary Agency; near point accommodation; Nurse Prac... |