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HelpTest Code VITB12 VITAMIN B12 [LAB67]
Test Method
Electrochemiluminescence
Performance
Monday-Friday 8:00a to 10:00p
Saturday-Sunday 9:00a to 5:00p
Analytical Time:
4 hours
Specimen Requirement
Container/Tube Type:
Green (Lithium Heparin)
Mint Green (Heparin Plasma Separator Tube)
Red (No Additive)
SST (Serum Separator)
Preferred Collection Container:
Green (Lithium Heparin)
Light Green (Heparin Plasma Separator Tube)
Collection Information:
Specimen Volume: 5-7 mL of blood in a red top; SST, or green top tube.
Collection Instructions: Fasting-overnight (12 hour) is the specimen of choice.
Transport Information:
1.3 mL serum or lithium plasma
Minimum Sample Volume: 
0.4 mL
Specimen Stability
Refrigerated Stability:
48 hours
Frozen Stability:
2 months
CPT Code Information
82607
Alias
B(12) Assay, B(12) Assay, B12 + Folate, B12 Assay, B12, Serum, CblC, Cobalamin, Cobalamin Cyanocobalamin, Cobalamin Deficiency, Cyanocobalamin, Vit B12, S, Vitamin B-12 Assay, Serum, Vitamin B12 and Folate, Serum, Vitamin B12, Serum, B(12) Assay, B(12) Assay, B12 + Folate, B12 Assay, Cobalamin, Cyanocobalamin, Vitamin B12 and Folate, Serum