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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


Specimen Requirements Additional Information

Laboratory Department(s):  Branch Chemistry

Physician Office Specimen Requirements Additional Information

Billings Clinic Westend and Heights Branch Clinics Only