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Test Code UN 24 U Urea Nitrogen, 24 Hour, Urine

Performing Laboratory

Memorial Hospital Laboratory- Automated Procedures  304-388-5953       

Specimen Requirements

Submit an entire 24-hour urine collection in a urine container without preservative (supplied) Refrigerate specimen during collection and send specimen on ice.

Start and end times of collection are required on request form for processing

24-Hour Urine Collection Instructions

24 Hour Urine Collection

Storage and Stability

Store at 2-8o C until analyzed

Reference Values

7,000-16,000 mg/day

Methodology

Photometric enzyamtic assay

Days Test Set Up and Turnaround

Monday through Sunday, Continuously 

AM Collection Expected by 9AM same day
Routine Expected within 24 hrs
Stat Expected within 1 hr
Timed Expected results are test dependant

CPT Coding

84540

81050

Specimen Rejection

  • Improperly labeled, collected, stored, and transported
  • Quantity not sufficient