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Test Code BLOD0389 Felbamate (Felbatol), Serum

Additional Codes

Mayo Test Code: FELBA

Useful For

Determining whether a poor therapeutic response is attributable to noncompliance or lack of drug effectiveness


Monitoring changes in serum concentrations resulting from interactions with coadministered drugs such as barbiturates and phenytoin

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type


Specimen Required


Preferred: Red top

Acceptable: Serum gel

Specimen Volume: 1 mL

Collection Instructions: Draw specimen immediately before next scheduled dose.

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 28 days
  Ambient  28 days
  Frozen  28 days

Reference Values

30.0-60.0 mcg/mL

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


Reject Due To


Mild OK; Gross OK


Mild OK; Gross OK


Mild OK; Gross OK



Method Name

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

Day(s) and Time(s) Performed

Monday, Wednesday, Friday; 3 p.m.


If not ordering electronically, complete, print, and send a Neurology Specialty Testing Client Test Request (T732) with the specimen (