ARUP's Laboratory Test Directory

Vitamin B12 : 0070150

Mnemonic: B12

Methodology: Chemiluminescent Immunoassay
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect:  One 4 mL serum separator tube.

Transport:  1 mL serum, frozen. (Min: 0.5 mL)  Protect from light.  Submit specimen in an ARUP Amber Transport Tube. 

Pediatric Collection/Transport:  0.3 mL serum, frozen.

Remarks:  Allow serum to clot completely at room temperature before centrifuging.  Protect from light during collection, storage, and shipment.

Stability:  After separation from cells: Ambient: 8 hours; Refrigerated: 2 days; Frozen: 3 months
Reference Interval:
210-911 pg/mL
Note: 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.
CPT Code(s): 82607
 
 

 

 

 
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