General Information

UPHSM LIS Test #: 5564
Testing Time: 2 - 4 Days
Testing Lab: Labcorp

Specimen Info
Only 1 specimen type required, unless otherwise specified

Volume: 1.0 mL (0.3 mL minimum) serum OR plasma
Temperature: Room Temperature
Tube Type: 1 Red-Top Tube
Collection Info:
Container:  Red-top tube or plastic transport tube. Do not use a gel-barrier tube. The use of gel-barrier tubes is not recommended due to slow absorption of the drug by the gel. Depending on the specimen volume and storage time, the decrease in drug level due to absorption may be clinically significant.

Collection:  Transfer serum or plasma to a plastic transport tube. Draw trough levels immediately prior to next dose. Steady-state levels are reached within two to three days in patients taking oxcarbazepine twice daily.

Causes for Rejection:  Gross lipemia; hemolysis; icteric specimen; gel-barrier tube


Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

CPT Codes


* The CPT codes provided 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 payer being billed.

Reference Range

10−35 μg/mL