Vitamin B12 : ARUP Lab Tests

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Vitamin B₁₂ : 0070150

Mnemonic: B12

Methodology:	Quantitative Chemiluminescent Immunoassay
Performed:	Sun-Sat
Reported:	Within 24 hours
Specimen Required:	Collect: Serum separator tube. Specimen Preparation: Protect from light during collection, storage, and shipment. Allow specimen to clot completely at room temperature. Transfer 1 mL serum to an ARUP Amber Transport Tube. (Min: 0.5 mL) Storage/Transport Temperature: Frozen. Unacceptable Conditions: Hemolyzed specimens. Stability (collection to initiation of testing): After separation from cells: Ambient: 8 hours; Refrigerated: 48 hours; 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
Cross References:	B₁₂ Vitamin (Vitamin B₁₂) , Cobalamin (Vitamin B₁₂) , Methylcobalamin (Vitamin B₁₂)

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