91228      Vitamin B6
Specimen:
  Collect: One 4 mL Green Top (Li Heparin)

Also Acceptable
One 10 mL Red Top
One 4 mL Green Top (Na Heparin) 
  Submit: 1 mL (Min:0.5 mL) Plasma. Submit Frozen. Submit in a Standard Transport Tube.  
  Special Handling: Critical Frozen
Protect from Light
Separate aliquot required for each frozen test ordered
Separate from cells ASAP
Collect after overnight fast.
Separate plasma and freeze, protected from light within 2 hours of collection 
  Rejection Criteria: EDTA plasma
Grossly Hemolyzed Samples
Grossly Lipemic Samples
Hemolyzed specimens
Lipemic Samples
Specimen not protected from light
Specimen not submitted frozen
Use of separator tubes
Whole blood 
  Stability: Ambient: Unacceptable; Refrigerated: 4 Hour(s); Frozen: 2 Month(s); Incubated: Unacceptable 
Methodology: High performance liquid chromatography (HPLC) 
Performed: Sun-Sat 
Reported: 2-5 Day(s) 
CPT Codes:
84207
Interpretive Data:
General Reference Range : 20-125 nmol/L