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Urea Nitrogen, Urine
UUNT
Synonyms
Urine BUN
Specimen Requirements
Submit an entire 24-hour urine collection in a urine container. No preservative. Send specimen refrigerated.
- Starting and ending times of collection are required.
- Follow instructions in Urine Collections in Special Instructions.
Methodology
Colorimetric, Urease
Reference Values
64-99 mL/minute
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
81050-Urine timed measurement (For 24 hr collection)
84540-Urea, Urine