| 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 |