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BUN

Message
Specimen Requirement: Gold SST or Green Top (LiHep)Ambulatory Transport Temperature to Inova Central Lab: Refrigerated Specimen Stability: 7 days


Test Code
LAB140 BUN


Alias/See Also
BUN


CPT Codes
84520

Includes
If collecting a sample for FUN:BUN Ratio, read Urea Nitrogen, Filtrated (FUN) collection requirements and shipping handling instructions.


Instructions
Processing Instructions: Centrifuge and separate cells after clot formation and within 4 hours of collection. If drawn using a plain red-top tube, transfer serum to a plastic screw-cap tube prior to transportation. Preferred Testing Volume: 0.5mL serumMinimum Testing Volume: 0.1 mL serum Transport Temperature: Refrigerated Stability: Ambient: 7 daysRefrigerated : 7 daysFrozen: 1 year Causes for Rejection: Unlabeled, mislabeled, wrong tube type, QNS, hemolyzedPerforming Lab: Inova Laboratory Services


Clinical Significance
1230130080



Last Updated: May 18, 2026


The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.