Carbamazepine

Test Code

LAB21

Alias/See Also

Tegretol®

CPT Codes
80156

Preferred Specimen

Routine venipuncture. One 4.5ml Light green top (heparin) tube or one 5ml Red/gold top serum separator tube.

Instructions

Specimens should be drawn just before the next dose for trough values. If toxicity is suspected, then specimens may be drawn at any time.

Specimen Stability

Refrigerate, stable 48 hours; stable 8 hours at room temperature; stable 6 months if frozen.

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Failure to follow stability requirements

Methodology
Multiple point rate-immuno rate:The rate of dye formation is inversely propotional to the carbamazepine concentration in the sample.

Setup Schedule

Daily

Report Available

Within 24 hours

Reference Range

4.0-12.0 µg/mL

Clinical Significance

Carbamazepine is indicated for the treatment of psychomotor and grand mal seizures as well as trigeminal neuralgia. Carbamazepine is monitored for suspected inadequate dose or toxicity.

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.