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

Performing Lab

Principle Laboratory - Dallas
6210 N Belt Line Rd
Irving, TX 75063

Principle Laboratory - Houston
16840 Buccaneer Ln
Suite 281
Houston, TX 77058