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Beaumont Laboratory

Vitamin B6

Pyridoxine, B6, Pyridoxal 5-Phosphate (PLP), Plasma, WARDE: VITB6, Antrim #83235, EPIC: LAB6180, SOFT: XVIB6


  • It is important that the patient fasts  for 12-14 hours before specimen collection. No substance except water should be ingested during this time frame.
  • Individuals should also refrain from ingesting vitamin supplements or alcohol 24 hours prior to drawing the specimen.

Specimen Collection Criteria

Collect: One Lavendar-top EDTA tube.

  • Critical frozen.
  • Protect specimen from light.
  • Send specimen for processing immediately after collection.

Physician Office/Drawsite Specimen Preparation

Critical frozen. Maintain frozen (-20°C/-4°F or below) prior to transport. Protect specimen from light. Centrifuge immediately to separate plasma from cells. Transfer plasma to an amber transport tube and freeze (-20°C/-4°F or below) immediately.

Preparation for Courier Transport

Transport: 1.0 mL plasma, frozen (-20°C/-4°F or below). (Min: 0.5 mL)

Rejection Criteria

  • Specimens not collected and processed as indicated.


Specimen Stability for Testing:

Room temperature (20-26°C or 68-78.8°F): Unacceptable
Refrigerated (2-8°C or 36-46°F): Unacceptable
Frozen (-20°C/-4°F or below): 14 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Sendout Laboratory with any questions. 


Sent to Warde Medical Laboratory, Ann Arbor, MI.


Monday - Friday.
Results available in 2-4 days.

Reference Range

By report.

Test Methodology

High-Performance Liquid Chromatography (HPLC).

CPT Code


Test Codes

WARDE: VITB6, Antrim #83235, EPIC: LAB6180, SOFT: XVIB6

Last Updated


Microtainer® and Vacutainer® are registered trademarks of Becton, Dickinson and Company.
UroVysion® is a registered trademark of Abbott Laboratories. ThinPrep® is a registered trademark of Hologic, Incorporated.

This directory currently reflects information only for specimens collected and/or processed at the Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.