Specimen:
Collect
- One Red Top
Also Acceptable:
- Green Top (Li Heparin)
- Green Top (Na Heparin)
- SST
Submit
- 1 mL (Min:0.3 mL) Serum . Submit Frozen. Submit in a Standard Transport Tube.
Also Acceptable:
- 1 mL (Min:0.3 mL) Plasma . Submit Frozen. Submit in a Standard Transport Tube.
Special Handling
- Protect from Light
- Separate serum from cells ASAP or within 2 hours of collection
- Collect specimen after a 4-hour fast.
For determination of Vitamin B3 sufficiency, avoid use of vitamin supplements for 24 hours prior to collection.
Rejection Criteria
- EDTA plasma
- Hemolyzed specimens
Stability
Ambient: 6 Hour(s); Refrigerated: Unacceptable; Frozen: 1 Month(s); Incubated: Unacceptable
Methodology
- Quantitative High Performance Liquid Chromatography-Tandem Mass Spectrometry
Performed
Varies
Reported
4-10 Day(s)
CPT Codes
- 84591
Interpretive Data
Please see report for interpretive data.
Components
- 94998 - NICOTINIC ACID
- 94999 - NICOTINAMIDE
- 95000 - NICOTINURIC ACID
Last Updated: July 30, 2026 @ 9:13 am
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