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Test Code LAB140 Urea Nitrogen, Blood

Specimen Requirement

0.5 mL Lithium Heparin plasma; only PST acceptable.

Specimen Stability

7 days at 20-25° C

7 days at 2-8° C

1 year at -20° C

Testing Schedule

Daily

Reference Range

7 – 22 mg/dL

Testing Department

Chemistry

Method

urease with glutamate dehydrogenase

CPT Code

84520