Test ID: ZG224
CPT code: 84591
LOINC:
Specimen Type: Red or Lav (EDTA) tube
Frequency: 4 – 10 days
Instructions: 1.5 mL Serum or Plasma from Red or Lav (EDTA) tube, Frozen. Min 1 mL
Text: Measurement of vitamin B3 level as nicotinic acid and nicotinamide. Both nicotinic acid and nicotinamide are absorbed from the normal diet. Nicotinamide is the form of vitamin B3 that is commonly found in nutritional supplements and used to fortify foods
Methodology: Liquid chromatography/tandem mass spectrometry (LC/MS-MS)