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Vitamin B3
Test CodeB3
CPT Codes
84591
Includes
Nicotinamide and Nicotinic Acid
Preferred Specimen
1 mL frozen serum collected in a light protected red-top tube (no gel)
Minimum Volume
0.5 mL
Other Acceptable Specimens
Frozen plasma collected in a light protected EDTA (lavender-top) tube
Instructions
Pour serum or plasma into amber transport tube (preferred) or transport tube wrapped in aluminum foil to protect from light.
Transport Temperature
Frozen
Specimen Stability
Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen: 30 days
Refrigerated: Unacceptable
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Serum separator tubes
Methodology
Chromatography/Mass Spectrometry
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Set up: Tues, Thurs, Sat; Report available: 2-4 days
Clinical Significance
Nicotinic acid occurs naturally in plants and animals and is also added to many foods as a vitamin supplement.
Performing Laboratory
Quest Diagnostics Nichols Institute Valencia
27027 Tourney Road
Valencia, CA 91355-5386