Aids in the detection of vitamin B12 deficiency in individuals with macrocytic or unexplained anemia, or unexplained neurologic disease.
Quantitative Chemiluminescent Immunoassay
Within 24 hours
Serum separator tube. Also acceptable: Green (sodium or lithium heparin).
Protect from light during collection, storage, and shipment. Allow specimen to clot completely at room temperature. Transfer 1 mL serum or plasma to an ARUP Amber Transport Tube. (Min: 0.5 mL)
EDTA plasma. Hemolyzed specimens.
After separation from cells: Ambient: 8 hours; Refrigerated: 24 hours; Frozen: 3 months
Effective December 2, 2013
Also refer to Methylmalonic Acid (MMA), Serum Quantitative (0099431). Some references suggest that elevated methylmalonic acid is an early and sensitive indicator of vitamin B12 (cobalamin) deficiency.
|Component Test Code*||Component Chart Name||LOINC|
- B12 Assay
- B12 Vitamin
- B12, Serum
- Vit B12