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0020023
Urea Nitrogen, Serum or Plasma
BUN
Ordering Recommendation
Screening test to evaluate kidney function.
New York DOH Approval Status
This test is New York state 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
Methodology
Quantitative Spectrophotometry
Performed
Sun-Sat
Reported
Within 24 hours
Reference Interval
Refer to Report
Interpretive Data
Compliance Category
FDA
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
- BUN
- urea nitrogen clearance
- Blood Urea Nitrogen
Urea Nitrogen, Serum or Plasma
