Valproic Acid Level, Total and Free

Message
Do not use gel barrier tubes. Centrifuge and immediately separate serum or plasma specimens from the cells into clean, plastic, screw-cap vial(s). Do not use serum separator tubes. Submission of a serum separator tube will result in cancellation.


Test Code
LAB172 VPAQ


Alias/See Also
VPAQ


CPT Codes
80164| 80165

Includes
Patient Preparation: Collect as a trough just before next dose. Optimum time to collect sample: 1 hour before next dose.@BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@


Instructions
Minimum Testing Volume: 1.5 mL Serum or Plasma Transport Temperature: Refrigerated Stability: Ambient: 48 HoursRefrigerated : 7 DaysFrozen: 30 Days Causes for Rejection: Serum separator tubes (SST)


Report Available
3-Days


Clinical Significance
1230170894



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.