Feb 8, 2018




Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Chemistry

Urea Nitrogen, Urine

Urea Nitrogen, Urine (HCUREA) Chemistry Lab Test

Name: Urea Nitrogen, Urine

Test Name: Urea Nitrogen, Urine

Health Link Test Code: HCUREA

LIS Test Code: UREA

CPT Code(s): 84540

Methodology: Urease

Days Performed: Daily, 24 hours.

In-Lab Turnaround Time: 4 hours.

Stat In-Lab Turnaround Time: 1 hour.

Specimen: Random urine

Collection Container: Sterile screw cap container

Collection Volume: Entire collection

Stability Ambient:

2 days

Stability Refridgerated:

7 days

Stability Frozen:

1 month

Sample Analyzed: Urine aliquot

Testing Volume: 1 mL

Pediatric Testing Volume: 0.4 mL

Specimen Transport:

Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.


Results reported as mg/dL urea nitrogen.

Additional Information:

Urine urea nitrogen is typically used as an indicator of renal function. For nutritional assessment of nitrogen balance see Total Nitrogen, Urine.