Felbamate, Blood

Test Code
72691

CPT Codes
80299

Preferred Specimen
1 mL whole blood collected in an EDTA (lavender-top) tube

Minimum Volume
0.25 mL

Transport Temperature
Refrigerated (cold packs)

Specimen Stability
Room temperature: 30 days
Refrigerated: 30 days
Frozen: 1 year

Methodology
Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

Setup Schedule
Set up: Mon, Thurs; Report available: 3 days

Reference Range
56 adult patients receiving an average daily oral dose of 2300 mg had steady-state trough plasma concentrations averaging 33 mcg/mL (range, 18-52 mcg/mL).

26 patients ages 10-69 years receiving an average dose of 2685 mg had serum concentrations averaging 69 mcg/mL (range, 16-165 mcg/mL).

The ratio of whole blood concentration to plasma concentration is 1.0.

Clinical Significance
Test is for therapeutic drug monitoring.

Performing Laboratory
NMS Labs
200 Welsh Rd
Horsham, PA 19044



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.