Test Details

Mnemonic

TOPIR

Ordering Code

1752050

CPT-4 Code(s)

80201

Specimen Information

Collect

Red-top
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Specimen Preparation

Centrifuge, separate serum from cells within 6 hours and send 1.0 mL serum refrigerated in a screw-capped plastic vial.
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Alternate Specimen

Lavender EDTA, green sodium or lithium heparin
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Minimum Volume

0.2 mL
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Transport Temperature

Refrigerated
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Rejection Criteria

SST
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Stability

Room temperature: Unacceptable
Refrigerated: 7 days
Frozen: 14 days
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Methodology

High Performance Liquid Chromatography/Tandem Mass Spectrometry
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Reference Range

2 - 20 µg/mL
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Performing Laboratory

Warde Medical Laboratory
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