Test Code BUN Blood Urea Nitrogen (BUN)
Specimen Required
Lithium Heparin Plasma Separator Tube (GREEN) or
Serum Separator Tube SST (YELLOW)
Specimen Handling and Stability
Handle and store specimens in stoppered containers to avoid contamination and evaporation.
Centrifuge specimens to remove the plasma/serum from the cellular material within 4 hours of collection.
Specimen Stability
* Room Temperature: 1 day
* Refrigerated: 5 days
* Frozen: 6 months
CPT Code
84520