Vitamin B-12

CPT Code


Specimen Type


Container Type

Serum Separator Tube (SST)/Yellow


Room Temperature, 3 days; 2-8°C, 7 days; -20°C, > 7 days

Clinical Notes

Vitamin B12 is a water-soluble essential vitamin that plays an important role in supplying methyl groups for protein and DNA synthesis. In particular, B12 is required for the synthesis of blood and the maintenance of normal brain and nerve functioning