| Abbreviation | Definition |
|---|---|
| NICS | National Institute of Clinical Studies |
| NICS | neuro-immuno-cutaneous system |
| NICS | Northern Ireland Civil Service |
| NICVA | Northern Ireland Council for Voluntary Action |
| NIGBXX | National Information Governance Board for Health and Social Care |
| NIHR | National Institute for Health Research |
| NIHRCSPXX | National Institute of Health Research Coordinated System for gaining NHS Permission |
| NIMHE | National Institute for Mental Health in England |
| NIMM | NHS Infrastructure Maturity Model |
| NIN | National Intervention Network |
| NIN | non-invasive neoplasia |
| NINo | National Insurance Number |
| NIPE | Newborn and infant physical examination |
| NIRB | non-institutional review board |
| NIS | Network Incentive Scheme |
| NISP | National Infrastructure Service Provider |
| NIV | National Institute for Virology |
| NIV | Non Invasive Ventilation |
| NKDA | Not Known Didn't Ask |
| NLH | National Library For Health (NHS Evidence) |