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Test Code UREA NITROGEN UREA NITROGEN

Order Code

BUN

Alt Test Name

Blood Urea Nitrogen, BUN, UREA

Methodology

Colorimetric

Prefered Specimen Type

Green Top (Lithium Heparin)

Other Acceptable Specimens

Red Top or SST

Specimen Minimum Volume

0.5 mL Plasma

Stability

Room Temperature ó 1 days; Refrigerated ó 5 days

Routine Analytic Time

4 Hours

STAT Analytic Time

1 Hour

Department

Chemistry

LOINC Code

3094-0

CPT Code

84520

Reference Range

Adult: 5-22 mg/dL; 0-1 month 4-12 mg/dL; 1 month-12 years 5-18 mg/dL, 12-20 years 7-18 mg/dL