Test Details

Mnemonic

METHD

Ordering Code

1750760

CPT-4 Code(s)

80358 (G0480)

Specimen Information

Collect

Red-top
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Specimen Preparation

Centrifuge, separate serum from cells and send 2.0 mL serum refrigerated in a screw-capped plastic vial.
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Minimum Volume

1.0 mL
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Transport Temperature

Refrigerated
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Rejection Criteria

SST
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Stability

Room temperature: 48 hours
Refrigerated: 14 days
Frozen: 14 days
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Methodology

High Performance Liquid Chromatography/Tandem Spectrometry
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Reference Range

Therapeutic:
100 – 400 ng/mL (analgesic)
100 – 1000 ng/mL (addict therapy)
Toxic: >2000 ng/mL
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Performing Laboratory

Warde Medical Laboratory
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