Ordering Recommendation
Mnemonic
UUN
Methodology

Quantitative Spectrophotometry

Performed

Sun-Sat

Reported

Within 24 hours

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

24-hour urine with no additive. Refrigerate during collection. Also acceptable: Random urine.

Specimen Preparation

Transfer 3 mL aliquot from a well-mixed 24-hour collection to an ARUP Standard Transport Tube. (Min: 0.5 mL) Record total volume and collection time interval on transport tube and test request form.

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Urine collected with acid. Specimens stored at room temperature.

Remarks
Stability

Ambient: 48 hours; Refrigerated: 1 week; Frozen: 1 month

Reference Interval

12.0-20.0 g/d

Interpretive Data



No compliance statements are in use for this test.

Note

Reference interval for random urine has not been established.

Hotline History
N/A
CPT Codes

84540

Components
Component Test Code* Component Chart Name LOINC
0020207 Creatinine, Urine - per volume 2161-8
0020208 Creatinine, Urine - per 24h 2162-6
0020216 Urine Urea Nitrogen - mg/dL 12967-6
0020217 Urea Nitrogen, Urine g/day 3096-5
0097110 Total Volume 19153-6
0097111 Hours Collected 30211-7
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Urea
  • urine urea nitrogen clearance
Urea Nitrogen, Urine