Urea Nitrogen, Serum or Plasma : ARUP Lab Tests

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Urea Nitrogen, Serum or Plasma : 0020023

Mnemonic: BUN

Methodology:	Quantitative Spectrophotometry
Performed:	Sun-Sat
Reported:	Within 24 hours
Specimen Required:	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. Stability (collection to initiation of testing): After separation from cells: Ambient: 24 hours; Refrigerated: 5 days; Frozen: 6 months

Reference Interval: By report (reports may vary based on instrumentation)
CPT Code(s):	84520
Cross References:	Blood Urea Nitrogen (Urea Nitrogen, Serum or Plasma), BUN (Urea Nitrogen, Serum or Plasma)

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