A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Vitamin B6, Plasma [926]

Message
For Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.Patient Preparation: 


Test Code
VITB6


Alias/See Also
926;
PYRIDOXINE


CPT Codes
84207

Preferred Specimen
1 mL plasma collected in an EDTA (lavender-top) tube - protected from light. Specimen cannot be used for multiple tests. If other vitamin tests are ordered, draw tubes for each vitamin requested.


Patient Preparation
Overnight fasting is required

Minimum Volume
0.5 mL


Instructions
Separate cells within 6 hours by centrifugation at 2-8° C (2200-2500 RPM, 800-1000 g) 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 or foil wrapped transport tube - light protected


Transport Temperature
Frozen


Specimen Stability
Room temperature: 72 hours
Refrigerated: 5 days
Frozen -20°C: 14 days
Frozen -70°C: 42 days


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Not light protected; Received room temperature; Received refrigerated; Hemolysis; Lipemia


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

FDA Status
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.

Setup Schedule
Set up: Mon-Sat; Report available: 2-4 days


Reference Range
0-1 year Not established
2-17 years 3.0-35.0 ng/mL
≥18 years 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


Last Updated: December 1, 2022


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.