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Test Code
VTB6
Test Name
Vitamin B6
CPT Codes
84207
Expected Turnaround Time
4-6 days
Clinical Utility

This test is used to detect vitamin B6 deficiency.
Specimen and Container Info

Specimen Type: Plasma

Collection Container: Lavender Top (EDTA)

Desired Specimen Volume: 0.5 mL
Collection Instructions
  1. Collect a lavender (EDTA) tube via venipuncture.
  2. Mix immediately by gentle inversion at least six times to ensure adequate mixing. 
Processing and Submission Instructions
  1. Separate plasma from cells.
  2. Transfer 0.5 mL of plasma to an amber aliquot tube (protect specimen from light).
  3. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Transport Instructions

Transport to the laboratory frozen.
Stability Requirements

Room Temperature

3 days

Refrigerated

15 days

Frozen

15 days

Freeze/Thaw Cycles

 Stable x6
Causes for Rejection
  • Anticoagulants other than EDTA
  • Specimen not protected from light
Methodology
Liquid Chromatography - Tandem Mass Spectrometry (LC-MS/MS)
Reference Intervals

See patient report.
Alternate Names
  • B6
  • B6, Vitamin
  • PLP
  • Pyridoxal-5-Phosphate
  • Pyridoxine
Reference Lab
Labcorp Of America Holdings
Testing Schedule
Routine, daily
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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