Test Details

Mnemonic

VB2

Ordering Code

3422140

CPT-4 Code(s)

84252

Specimen Information

Patient Preparation

Avoid vitamin supplements for 24 hours prior to draw. Overnight fasting required.
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Collect

Lavender EDTA
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Specimen Preparation

Centrifuge, separate serum from cells and send 2.0 mL plasma frozen in an amber screw-capped plastic vial. PROTECT FROM LIGHT.
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Minimum Volume

0.5 mL
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Transport Temperature

Frozen
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Rejection Criteria

SST or PST (Polymer gel separation tubes)
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Stability

Room temperature: 4 hours
Refrigerated: 24 hours
Frozen: 30 days
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Methodology

Chromatography/Mass Spectrometry
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Reference Range

6.2 - 39.0 nmol/L
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Performing Laboratory

Quest Valencia
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