| Abbreviation | Definition |
|---|---|
| NWH | Newton-Wellesley Hospital |
| NWH | Northern Westchester Hospital |
| NWH | NorthWest Hospital |
| NWIHC | Northwest Indiana Heart Center |
| NYAS | North Yorkshire Ambulance Service |
| NYCH | New York Community Hospital |
| NYD | Not Yet Diagnosed |
| NYGH | North York General Hospital |
| NYH | New York Hospital |
| NYH | New York Hospital Medical Center |
| NYH-Q | New York Hospital Medical Center of Queens |
| NYM | New York Methodist Hospital |
| NYMH | New York Methodist Hospital |
| NYOH | New York Orthopaedic Hospital |
| NYP | New York Presbyterian |
| NYPH | New York Presbyterian Hospital |
| NYPH | NewYork Presbyterian Hospital |
| O | Obvious |
| O&M | Organization and Method |
| O.R.N. | Operating Room Nurse |