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Test Code 529 Carbamazepine

Additional Codes


PowerChart: Carbamazepine (Tegretol) Total

MA Cerner: Carbamezapine Level.

Specimen Requirement

0.5 mL serum or plasma is required.

Additional Specimen Collection Information

Collect blood in a lithium heparin, green-top or red-top tube. Serum and plasma gel tubes are NOT acceptable. Serum or plasma should be separated from contact with the cells within 2 hours of collection. Specimens not centrifuged within 4 hours of collection may be rejected. Refrigerate the specimen if unable to assay within 8 hours of collection. Samples with ≥3+ lipemia must be cleared prior to analysis.

Useful For

Monitoring therapy

Determining compliance

Assessing toxicity



Testing is performed Monday through Sunday.

Routine: Typically completed within 4 hours after the specimen arrives at the testing site.

Expedite: Typically completed within 1 hour after the specimen arrives at the testing site.

STAT: Typically completed within 30 minutes after the specimen arrives at the testing site.

CPT Code Information

80156 Therapeutic Drug Levels, Carbamazepine; total

LOINC Code Information

3432-2 Carbamazepine [Mass/Volume] In Serum Or Plasma

Test Method

Particle Enhanced Turbidimetric Inhibition Immunoassay; Beckman DXC880i

Reference Values

4.0-12.0 mcg/dL

  • Critical Value:  > 15 mcg/mL