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Test Code
This test is a lab developed test. For further information, see the Compliance Remarks section below.
SynonymsTrileptal; 10-OH Carbamazepine (MHD)
Container TypeRed top tube (plain)
Supply Item Number1372
Specimen TypeSerum
Preferred Volume1 mL
Emergency Minimum Volume0.5 mL
Patient PrepPre-dose (trough) levels should be drawn
Specimen ProcessingSeparate serum or plasma from cells within 2 hours of collection.
Store and TransportRefrigerated
StabilityRoom Temp 2 weeks  Refrigerated 2 weeks  Frozen (-20 °C) 1 month  
LimitationsHyponatremia can develop during oxcarbazepine therapy.
Reference LaboratoryPAML
Reference Lab Test CodeLCA code 911184
CPT Codes80183
Interface Order Code80299.Z55
Billing CodeOXCAR
Test ScheduleMon-Fri
Turnaround Time1-3 days
MethodTandem Mass Spectrometry
Reference Ranges
Oxcarbazepine Metabolite10-35ug/mL
Compliance RemarksThis test was developed and its performance characteristics determined by PAML. The U.S. Food and Drug Administration (FDA) has not approved or cleared this test. However, FDA approval or clearance is currently not required for clinical use of this test. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions. PAML is authorized under Clinical Laboratory Improvement Amendments (CLIA) to perform high-complexity testing.
NotesThis test measures monohydroxyoxcarbazepine (MHD).

Interface Codes
typeorder codetest descriptionresult coderesult descriptionunitsdecimal placesloinc code
o80299.Z55Oxcarbazepine Metabolite
r80299.Z55Oxcarbazepine Metabolite80299.Z55Oxcarbazepine Metaboliteug/mL031019-3