| RS | radioscaphoid; random sample; rating schedule; Raynaud syndrome; recipient's serum; rectal sinus; re... |
|---|---|
| SRG | specialty review group |
| SURS | solitary ulcer of rectum syndrome; surveillance and utilization review |
| UR | unconditioned reflex; upper respiratory; uridine; urinal; urology; utilization review |
| URAC | Utilization Review Accreditation Commission |