Vitamin B(6), Plasma
Test Code: 004655
Performing Lab: LabCorp
CPT Code: 84207 001
Synonym
Active B6; B(6); B(6), Vitamin; PLP; Pyridoxal-5-Phosphate; Pyridoxine
Specimen Type
Plasma (EDTA), PROTECTED FROM LIGHT
Specimen Container
Lavender-top (EDTA) tube; amber plastic transport tube with amber-top. (If amber tubes are unavailable, cover standard transport tube completely, top and bottom, with aluminum foil. Identify specimen with patient's name directly on the container AND on the outside of the aluminum foil. Secure with tape.) For amber plastic transport tube and amber-top, order LabCorp item No. 23594.
Volume
0.5 mL
Minimum Volume
0.25 mL (NOTE: This volume does NOT allow for repeat testing.)
Specimen Handling
Collect blood by venipuncture into a lavender-top tube containing EDTA and mixed immediately by gentle inversion at least six times to ensure adequate mixing. The plasma must be separated and protected from light in an amber transport tube with amber stopper. Specimens should be stored refrigerated or frozen immediately and maintained at temperature during shipping and at the testing facility. To avoid delays in turnaround time when requesting multiple tests on frozen samples, PLEASE SUBMIT SEPARATE FROZEN SPECIMENS FOR EACH TEST REQUESTED.
Unacceptable Conditions
Anticoagulants other than EDTA; specimen not protected from light
Temperature
Refrigerated or FROZEN and PROTECT FROM LIGHT.
Methodology
Liquid chromatography-tandem mass spectrometry (LC/MS-MS) This test measures pryidoxal 5-phosphate, the biologically active form of vitamin B6.
Stability
Room Temperature: 3 days
Refrigerated: 15 days
Frozen: 15 days
Refrigerated: 15 days
Frozen: 15 days
| Result Code | Result Name | LOINC |
|---|---|---|
| 004656 | Vitamin B6 | 30552-4 |
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