| Abbreviations | Meaning |
 | NHPF | National Health Policy Forum |
| NHPI | National Health Provider Inventory |
| NHQR | National Healthcare Quality Report |
| NHRC | Naval Health Research Center |
| NHRDP / PNRDS | National Health Research And Development Program / Programme National De Recherche Et De Développement En Matière De Santé |
| NHS | National Health Service |
| NHS EED | NHS Economic Evaluation Database |
| NHSA | National Healthcare Staffing Association |
| NHSC | National Health Service Corps |
| NHSDA | National Household Survey On Drug Abuse |
| NHSIA | National Health Service Information Authority |
| NI-WG | American Medical Informatics Association Nursing Informatics Working Group |
| NIA | National Institute On Aging |
| NIAAA | National Institute On Alcohol Abuse And Alcoholism |
| NIAH | National Institute Of Animal Health |
| NIAID | National Institute Of Allergy And Infectious Diseases |
| NIAMS | National Institute Of Arthritis And Musculoskeletal And Skin Diseases |
| NIB | National Industries For The Blind |
| NIBIB | National Institute Of Biomedical Imaging And Bioengineering |
| NIBSC | National Institute For Biological Standards And Control |
| NIC | Neonatal Intensive Care Nursing |
| NIC | Nursing Interventions Classification |
| NICA | Nicotine Anonymous |
| NICD | National Information Center On Deafness |
| NICE | National Institute For Health And Clinical Excellence |
| NICE / INSPA | National Initiative For The Care Of The Elderly / Initiative Nationale Pour Le Soin Des Personnes âgées |
| NICEATM | National Toxicology Program Interagency Center For The Evaluation Of Alternative Toxicological Methods |
| NICHCY | National Dissemination Center For Children With Disabilities |
| NICHD | National Institute Of Child Health And Human Development |
| NICHE | Nurses Improving Care For Health System Elders |
| NICHSR | National Information Center On Health Services Research And Health Care Technology |
| NICR | Northern Institute For Cancer Research |
| NICS | National Institute Of Clinical Studies |
| NICWA | National Indian Child Welfare Association |
| NIDA | National Institute On Drug Abuse |
| NIDAC | National Indigenous Drug And Alcohol Committee |
| NIDBR | Naval Institute For Dental And Biomedical Research |
| NIDCD | National Institute On Deafness And Other Communication Disorders |
| NIDCR | National Institute Of Dental & Craniofacial Research |
| NIDDK | National Institute Of Diabetes And Digestive And Kidney Diseases |
| NIDR | National Institute Of Dental Research |
| NIDRR | National Institute On Disability And Rehabilitation Research |
| NIDSEC | Nursing Information & Data Set Evaluatioon Center |
| NIDTAC | National Injury Data Technical Assistance Center |
| NIEHS | National Institute Of Environmental Health Sciences |
| NIFTE | National Initiative For Telehealth |
| NIG | National Institute Of Genetics |
| NIGAT | Northern Ireland Group For Art As Therapy |
| NIGMS | National Institute Of General Medical Sciences |
| NIH | National Institutes Of Health |
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