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Test Code
VB3
Test Name
Niacin, Vitamin B3
CPT Codes
84591
Included Tests
  • Nicotinic Acid
  • Nicotinamide
Expected Turnaround Time
4 - 10 days
Clinical Utility

Measurement of vitamin B3 level as nicotinic acid and nicotinamide.
Specimen and Container Info

Specimen Type: Plasma

Alternate Specimen Type: Serum

  

Collection Container: Lavender Top (EDTA)

Alternate Collection Container: Red Top, Plain

Desired Specimen Volume: 1.5 mL
Collection Instructions
  1. Collect specimen in lavender top EDTA tube via venipuncture.
Processing and Submission Instructions
  1. Separate plasma from cells.
  2. Transfer 1.5 mL of plasma to a LabCorp PP transpak frozen purple tube.
  3. The specimen should be frozen immediately and maintained frozen until tested.
  4. To avoid delays in turnaround time when requesting multiple tests on frozen specimens, please submit separate frozen specimen for each test requested.
Transport Instructions

Transport to the laboratory frozen. 
Stability Requirements

Frozen

14 days

Freeze/Thaw Cycles

 Stable x3
Causes for Rejection
  • Gel-barrier tube
  • Specimen not frozen
Methodology
Liquid Chromatography - Tandem Mass Spectrometry (LC-MS/MS)
Reference Intervals

See patient report.
Alternate Names
  • Niacin
  • Nicotinamide
  • Nicotinic Acid
Reference Lab
Labcorp Of America Holdings
Testing Schedule
Monday-Friday
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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