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HelpBCH Order Code LAB140 Urea Nitrogen (BUN), Serum
Performing Laboratory
Boulder Community Health
Specimen Requirements
Container/Tube: Serum gel tube(s)
Specimen Volume: 0.5 mL of serum
Specimen Transport Temperature
Ambient
Reference Values
0 days: 0-30 mg/dL
≥1 day: 7-23 mg/dL
Critical value (automatic call-back): >100 mg/dL
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
84520