Test Overview
Test Methodology

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

Test Usage

Determining vitamin B6 status, including in persons who present with progressive nerve compression disorders, such as carpal tunnel and tarsal tunnel syndromes; determining the overall success of a vitamin B6 supplementation program; and diagnosis and evaluation of hypophosphatasia.

Reference Range *

5 - 50 mcg/L

Test Details
Update Type: Replacement Test
Test Updated: 08/11/2021
Days Set Up
Monday - Friday
Analytic Time

2 - 5 days

Soft Order Code
PLP
MiChart Code
Pyridoxal 5-Phosphate (Vitamin B6) (Sendout)
Synonyms
  • B6
  • Pyridoxal Phosphate
  • Pyridoxal 5-Phosphate Level
  • PLP
  • VITAMIN B6, PLASMA OR SERUM
  • Vitamin B6
  • B6
Laboratory
Sendout
Reference Laboratory
Mayo PLP (60295)
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect specimen in a green top tube following an overnight (12-14 hour) fast. Patient should abstain from taking vitamin supplements for 24 hours prior to specimen collection. Centrifuge, aliquot plasma into plastic vial, and freeze. Protect specimen from light.

Special Handling

Fasting specimen. Protect specimen from light. STRICT FROZEN

Alternate Specimen
PST is acceptable
Normal Volume
1 mL plasma
Minimum Volume
0.5 mL plasma
Storage Temperature
STRICT frozen
Additional Information

Test sent to Mayo Medical Laboratories.

Billing
CPT Code
84207
Fee Code
20442
LOINC
30552-4
NY State Approved
No