Vitamin B6
Label Mnemonic: VTB6
Epic Lab Code: LAB120
Downtime Form: A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
Commercial Mail-out Laboratory
5231 RCP
Specimen Instructions:
Suggested: Collect the specimen after an overnight fast.
Collection Medium:
Light Green top tube (Lithium Heparin)
Preferred Minimum: 1 mL lithium plasma in an amber transport tube (transport tubes are located in Specimen Control)
Rejection Criteria:
Any specimens other than heparinized plasma. Non-frozen specimens. Serum separator tubes. Hemolyzed specimens.
Delivery Instructions:
Wrap specimen in aluminum foil to protect from light. Deliver to laboratory immediately after collection.
Turn Around Time:
4 working days upon receipt at reference laboratory
Reference Range:
20-125 nmol/L
Interpretive Data:
Pyridoxal 5'-phosphate measured in a specimen collected following an 8 hour or overnight fast accurately indicates vitamin B6 nutritional status. Non-fasting specimen concentration reflects recent vitamin intake.

Note: The biologically active form of vitamin B6, pyridoxal 5- phosphate, is measured in this assay.
Quantitative High Performance Liquid Chromatography
CPT Code:
See Additional Information:
Specimens Requiring Immediate Delivery