Test Overview
Test Methodology

LC-MS/MS

Test Usage

Monitor therapeutic drug level.

Reference Range *

The concentration of carbamazepine epoxide is normally 10-40% that of the parent drug, but can be variable. During combination therapy the relative concentration of carbamazepine epoxide to carbamazepine may increase slightly.

Test Details
Days Set Up
Tuesday, Friday
Analytic Time

4 hours

Soft Order Code
CEPOX
MiChart Code
Carbamazepine Epoxide
Synonyms
  • CARBAMA EPOXIDE LEVEL
  • Carbamazepine 10,11-epoxide
  • Tegretol
  • Tegretol Epoxide
  • CEPOX
  • CARBAMA EPOXIDE
Laboratory
Chemical Pathology
Section
Drug Analysis
Specimen Requirements
Collection Instructions

Collect blood in a red top tube; do not use SST. Centrifuge, aliquot serum into a plastic vial and refrigerate.

Alternate Specimen
Heparinized (green top) or EDTA (lavender top) plasma acceptable.
Normal Volume
3 mL serum
Minimum Volume
1 mL serum
Rejection Criteria
SST tube not acceptable.
Billing
CPT Code
80161
Fee Code
KA036
LOINC
9415-1
NY State Approved
No