| NRS | neurobehavioral rating scale; normal rabbit serum; normal reference serum; numerical rating scale |
|---|---|
| NRSCC | National Reference System in Clinical Chemistry |
| ORS | olfactory reference syndrome; oral rehydration solution; oral surgery, oral surgeon; Orthopaedic Res... |
| OSI | open systems interconnection [reference model] |
| PDR | pediatric radiology; peripheral diabetic retinopathy; Physicians' Desk Reference; postdelivery room;... |
| ICD | International Classification of Dis eases |
|---|---|
| ICD 10 | International Classification of Disease |
| ICD-9 | International Classification of Disease 9 |
| ICD-O | International Classification of Disease for Oncology |
| ICD-9 | International Classification of Disease, 9th Revision |