Vitamin B6, Plasma

Test Code
VB6

CPT Codes
84207

Preferred Specimen
1 mL plasma collected in an EDTA (lavender-top) tube - protected from light

Minimum Volume
0.5 mL

Instructions
Separate cells within 6 hours by centrifugation at 2-8° C (2200-2500 rpm, 800-1000g) for 5-10 minutes. Transfer plasma to an amber polypropylene or polyethylene transport tube to protect from light. Alternately, neutral color polypropylene or polyethylene tubes can be used if wrapped in aluminum foil. Freeze the tubes at -10 to -30° C. Ship frozen.

Transport Container
Amber transport tube, light-protected

Transport Temperature
Frozen

Specimen Stability
Room temperature: 6 hours
Refrigerated: 12 hours
Frozen -20°C: 6 days
Frozen -70°C: 42 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received room temperature • Received refrigerated • Hemolysis • Lipemia

Methodology
Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Reference Range
2-17 Years 3.0-35.0 ng/mL
Adult 2.1-21.7 ng/mL


Clinical Significance
Test is used to determine vitamin B6 deficiency or overdosage, for monitoring treatment, and to evaluate wellness and health.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153



The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.