| Abbreviation |
Term(s) |
| Undifferentiated |
UNDIFF |
| Unit |
U |
| Upper extremity |
UE |
| Upper gastrointestinal |
UGI |
| Upper inner quadrant (breast) |
UIQ |
| Upper outer quadrant (abdomen) |
UOQ |
| Upper respiratory infection |
URI |
| Urine |
UR |
| Urology |
UROL |
| Usual childhood diseases |
UCHD |