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HelpTest Code VITB3M Vitamin B3 and Metabolites, Plasma
Additional Codes
| Mayo | VITB3 |
| Epic ID | LAB3669 |
Specimen Type
Plasma EDTASpecimen Required
Patient Preparation:
Fasting: 4 hours, preferred but not required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Lavender top (K2 EDTA)
Acceptable: K3 EDTA
Submission Container/Tube: Plastic vial
Specimen Volume: 1.5 mL Plasma
Collection Instructions: Within 2 hours of collection, centrifuge and aliquot plasma into a plastic vial.
Specimen Minimum Volume
Plasma: 0.75 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Plasma EDTA | Refrigerated (preferred) | 28 days |
| Frozen | 28 days | |
| Ambient | 21 days |
Transport refrigerated.
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | OK |
| Gross icterus | OK |
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Method Name
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Useful For
Assessment of vitamin B3 status
Aid in the diagnosis of pellagra
Assisting in the diagnosis of suspected vitamin B3 deficiency or toxicity
Monitoring of vitamin B3 therapy
Day(s) Performed
Monday, Tuesday, Thursday, Friday
Report Available
2 to 4 daysReference Values
Nicotinic Acid (Niacin) Cutoff: <5.0 ng/mL
Nicotinamide: 5.0-48.0 ng/mL
Nicotinuric Acid Cutoff: <5.0 ng/mL
CPT Code Information
84591