| Abbreviation | Definition |
|---|---|
| NAG | National Advisory Groups |
| NAG | neutral alpha-glucosidase |
| NAGPT | National Association of General Practice Tutors |
| NAHAT | National Association of Hospital Authorities and Trusts (obsolete) |
| NAHFM | National Association of Health and Facilities Managers |
| NAHSPO | National Association of Health Service Personnel Officers |
| NAHSPRO | National Association of Health Service Public Relations Officers, now known as the Association of Healthcare Communicators |
| NALT | nasopharynx-associated lymphoid tissue in the eye |
| NALT | nose-associated lymphoid tissue in the eye |
| NAO | nucleus-associated organelle |
| NAPE | N-acyl phosphatidylethanolamine |
| NAPMECA | National Association of Postgraduate Medical Education Centre Administration |
| NAPMECA | This term got 29 hits on 22.10.2011, mostly in lists of abbreviations and acronyms. It is assumed to be retired |
| NAPS | National Acute Porphyria Service |
| NAS | Narcotics Assistance Section |
| NAS | National Acceptor Survey |
| NAS | Normative Aging Study |
| NASP | National Application Service Provider |
| NASP | National Association for Shoplifting Prevention |
| NATN | National Association of Theatre Nurses |