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Test Code UUN Urea Nitrogen, 24 Hour, Urine

Performing Laboratory

Lima Memorial Health System Laboratory

Specimen Requirements

Container/Tube: Plastic urine container
Minimum Volume: 0.5ml 
Collection Instructions: Starting and ending times of collection are required. No preservative. Refrigerate specimen during collection, and send specimen refrigerated. 

Special Instructions

Reference Values

6-17 gm/24 hours

Specimen Stability

Refrigerate: 48 hours
Frozen: aliquot for longer storage

Day(s) Test Set Up

Monday through Sunday

Methodology

Enzymatic

Test Classification and CPT Coding

81050 - urine timed measurement
84540 - urea nitrogen