| Abbreviation | Definition |
|---|---|
| NMSC | North Meridian Surgery Center |
| NOSCAR | Natural Orifice Surgery Consortium for Assessment and Research |
| NOTES | natural orifice translumenal endoscopic surgery |
| NOTES | Natural Orifice Transluminal Endoscopic Surgery |
| NOTUS | Natural Orifice Trans Umbilical Surgery |
| NPSC | North Pointe Surgery Center |
| NSAS | National Survey Of Ambulatory Surgery |
| NSCOS | North Shore Center for Orthopedic Surgery |
| NSH | National Surgical Hospitals |
| NSIG | Neurological Surgery Interest Group |
| NSPT | Non Surgical Periodontal Therapy |
| NSS | Nephron Sparing Surgery |
| NSSD | Non Surgical Spinal Decompression |
| NSST | Non Surgical Skin Tightening |
| NSTS | National Surgical Teaching Society |
| NTSI | Northwestern Trauma Surgical Initiative |
| NVOS | Northern Vermont Oral Surgery |
| O | In veterinary animal medical records O' , refers to owner of animal Ex: " O' checked dogs feet |
| OACIS | Outcomes After Critical Illness and Surgery |
| OBS | Office Based Surgery |