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BCH Order Code UNU Urea Nitrogen, 24-Hour Urine

Performing Laboratory

Boulder Community Health

Specimen Requirements

Container/Tube: 24-hour plastic urine container 

Specimen Volume: Entire 24-hour urine collection

Collection Instructions: No preservative. Refrigerate specimen during collection.
Note: 1. Starting and ending times of collection are required on request form for processing.

2. Follow instructions in “Urine Collections” in “Special Instructions.”

Specimen Transport Temperature


Reference Values

12-20 g/dL

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

81050-urine timed measurement

84540-urea nitrogen

Special Instructions