Ordering Recommendation

Screening test to evaluate kidney function.

Mnemonic
BUN
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

Plasma separator tube or serum separator tube.

Specimen Preparation

Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.2 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Specimens containing sodium fluoride.

Remarks
Stability

After separation from cells: Ambient: 1 week; Refrigerated: 1 week; Frozen: 1 year

Reference Interval

By report (reports may vary based on instrumentation)

Interpretive Data



No compliance statements are in use for this test.

Note
Hotline History
N/A
CPT Codes

84520

Components
Component Test Code* Component Chart Name LOINC
0020023 Urea Nitrogen, Serum or Plasma 3094-0
* 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 nitrogen clearance
  • Blood Urea Nitrogen
  • BUN
Urea Nitrogen, Serum or Plasma