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PHENOBARBITAL LEVEL

Message
Collect a full tube, following standard venipuncture techniques.


Test Code
LAB30 PHENB


Alias/See Also
PHENB


CPT Codes
80184

Instructions
Processing Instructions (Lab use only): Centrifuge within 1 hour of collection. Avoid the LIPID LAYER on top, if present. Transfer clarified specimen without lipemic material to a sample cup BEFORE testing. Minimum Testing Volume: 0.5 mL Serum Transport Temperature: Refrigerated Stability: Ambient: 2 daysRefrigerated : 8 days (when removed from clot or RBCs)Frozen: 6 Months Causes for Rejection: Unlabeled, mislabeled, wrong tube type, QNS, grossly hemolyzed


Clinical Significance
1230130013



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.