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Test Code NBLD0184 Urea Nitrogen, Quantitative, 24 Hour Urine

Useful For

Assessing protein intake and/or nitrogen balance


Urease with Glutamate Dehydrogenase (GLDH)/Bichromatic Rate

Performing Laboratory

Bozeman Health Laboratory Services

Specimen Requirements

Specimen Type: Urine
Container/Tube: 24-hour urine collection container
Specimen Volume:

Preferred: 10 mL

Acceptable: Entire collection
Specimen Minimum Volume: 1 mL
Collection Instructions:
1. Collect a 24-hour urine specimen.

2. No preservative. 

3. Refrigerate specimen during collection.

4. Mix well before taking aliquot.

Additional Information:

1. Starting and ending times of collection are required.

2. Follow special collection instructions below.

Special Instructions

Specimen Transport Temperature


Specimen Stability


Specimen Type Temperature Time
24-hour urine Ambient 2 hours
  Refrigerated 4 days
24-hour urine, preserved with thymol Ambient 4 days


Reference Values

7.0-20.0 g/24 hours

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

84540-Urea nitrogen

81050-Urine timed measurement (if appropriate)