Vitamin B3 (Niacin and Metabolite)
Test Code: 070115
Performing Lab: LabCorp
CPT Code: 84591 001
Synonym
Niacin, Nicotinamide, Nicotinin Acid
Specimen Type
Serum or plasma
Specimen Container
Red-top tube or lavender-top (EDTA) tube
Volume
1.5 mL each tube
Minimum Volume
1 mL each tube (NOTE:This volume does NOT allow for repeat testing).
Specimen Handling
Transfer the serum into a LabCorp PP transpak frozen purple tube with screw cap(LabCorp ID 049482). The specimen should be FROZEN immediately and maintained frozen until tested. To avoid delays in turnaroud time when requesting multiple test on frozen specimens, PLEASE SUBMIT SEPARATE FROZEN SPECIMEN FOR EACH TEST REQUESTED. Include the patient's age on the request form.
Unacceptable Conditions
Gel-barrier tube; specimen not frozen
Temperature
FREEZE
Methodology
Liquid chromatography/tandem mass spectrometry (LC/MS-MS)
Stability
Room Temperature: Unstable
Refrigerated: Unstable
Frozen: 14 days
Refrigerated: Unstable
Frozen: 14 days
| Result Code | Result Name | LOINC |
|---|---|---|
| 070112 | Nicotinamide | 56961-6 |
| 070113 | Nicotinic Acid | 18244-4 |
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