| UI | uroporphyrin isomerase |
|---|---|
| UIBC | unsaturated iron-binding capacity |
| UICAO | unilateral internal carotid artery occlusion |
| UICC | Union Internationale Contrele Cancer |
| UID | unique image identifier |
| UIF | undegraded insulin factor |
| UIP | Usual Interstitial Pneumonia |
| UIP | usual interstitial pneumonia |
| UIQ | upper inner quadrant |
| UIS | Utilization Information Service |