Test Details

Mnemonic

METHL

Ordering Code

1755020

CPT-4 Code(s)

80320 (84600)

Specimen Information

Collect

Gray sodium flouride. Do not remove cap from collection tube.
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Specimen Preparation

Send 5.0 mL whole blood (1.0 mL minimum) refrigerated. Do not open container. Specimens in aliquot containers must be sealed immediately after transferring to minimize exposure to air.
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Alternate Specimen

Green sodium or lithium heparin, red-top, urine
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Minimum Volume

1.0 mL
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Transport Temperature

Refrigerated
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Stability

Room temperature: 48 hours
Refrigerated: 7 days
Frozen: Unacceptable
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Methodology

Gas Chromatography/Flame Ionization Detection
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Reference Range

Decision level: 10 mg/dL
Toxic: >20 mg/dL
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Performing Laboratory

Warde Medical Laboratory
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