Vitamin B6 (Pyridoxal 5-Phosphate)
0080111
 
Ordering Recommendation
Mnemonic
VIT B6
Methodology
Quantitative High Performance Liquid Chromatography
Performed
Sun-Sat
Reported
1-4 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect specimen after an overnight fast.  
Collect
Green (sodium or lithium heparin) or plasma separator tube. Also acceptable: Plain red.  
Specimen Preparation
Protect from light during collection, storage, and shipment. Separate plasma or serum from cells within 1 hour of collection. Transfer 1 mL plasma or serum to an ARUP Amber Transport Tube and freeze immediately. (Min: 0.5 mL)  
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.  
Unacceptable Conditions
Any specimens other than heparinized plasma or serum. Non-frozen specimens. Serum separator tubes. Specimens collected in EDTA yield a higher pyridoxal 5'-phosphate concentration; therefore, EDTA is not acceptable. Hemolyzed specimens.  
Remarks
 
Stability
After separation from cells: Ambient: Unacceptable; Refrigerated: 4 hours; Frozen: 2 months  
Reference Interval
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.

See Compliance Statement B: www.aruplab.com/CS
Note
This test measures pyridoxal 5-phosphate, the biologically active form of vitamin B6.
CPT Code(s)
84207
Components
Component Test Code*Component Chart Name
0080111Vitamin B6 (Pyridoxal 5-Phosphate)
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, contact interface support at interface.support@aruplab.com.
Cross References
  • P 5-P
  • Pyridoxal Phosphate