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.

Collect

Lavender EDTA

Specimen Preparation

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

Minimum Volume

0.5 mL

Transport Temperature

Frozen

Rejection Criteria

Serum separator tube (SST) or Plasma separator tube (PST)

Stability

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

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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