Test Code Billings Clinic: 4403
Urea Nitrogen (BUN) (i-STAT®), Blood
Performing Laboratory
Billings Clinic Laboratory
Specimen Requirements
Draw a full, green-top (lithium heparin) tube, and send 4 mL of unprocessed lithium heparin whole blood. Lithium heparin tube must be properly filled. Immediately after draw invert several times to mix blood. Do not centrifuge. Forward unprocessed whole blood promptly.
Reference Values
8-26 mg/dL
Test Classification and CPT Coding
84520
Specimen Requirements Additional Information
Laboratory Department(s): Branch Chemistry
Physician Office Specimen Requirements Additional Information
Billings Clinic Westend and Heights Branch Clinics Only
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