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Test Code FLEC Flecainide, Serum

Additional Codes


Powerchart: Flecainide Level

MA Cerner: Flecainide, Serum

Reporting Name

Flecainide, S

Useful For

Optimizing dosage


Assessing flecainide toxicity


Monitoring compliance

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum Red

Specimen Required

Collection Container/Tube: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1.5 mL

Collection Instructions:

1. Draw blood immediately before next scheduled dose.

2. Centrifuge and aliquot serum into a plastic vial within 2 hours of collection.

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

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

Reference Values

Trough Value

0.2-1.0 mcg/mL: Therapeutic concentration

>1.0 mcg/mL: Toxic concentration

Day(s) Performed

Monday through Saturday

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 US Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FLEC Flecainide, S 3638-4


Result ID Test Result Name Result LOINC Value
9243 Flecainide, S 3638-4

Report Available

2 to 5 days

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Method Name

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

Secondary ID



If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.