Vitamin B12 with Reflex to Methylmalonic Acid (MMA), Serum Quantitative : ARUP Lab Tests

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Vitamin B₁₂ with Reflex to Methylmalonic Acid (MMA), Serum Quantitative : 0055662

Mnemonic: B12 MMA

Methodology:	Chemiluminescent Immunoassay/Tandem Mass Spectrometry
Performed:	Sun-Sat
Reported:	Next day for Vitamin B12; 4-6 days if MMA is performed
Specimen Required:	Collect: One 7 mL plain red or serum separator tube. Transport: 3 mL serum, frozen. (Min: 1.5 mL) Submit specimen in an ARUP Amber Transport Tube. Protect from light. Remarks: Protect from light during collection, storage and shipment. Unacceptable Conditions: Plasma. Grossly hemolyzed or lipemic specimens. Stability: After separation from cells: Ambient: 8 hours; Refrigerated: 2 days; Frozen: 1 month

Reference Interval:

Test Number	Components	Reference Interval
0070150	Vitamin B₁₂	210-911 pg/mL
	Methylmalonic Acid (MMA), Serum Quantitative	0.00-0.40 µmol/L

Note:

If Vitamin B12 is 300 pg/mL, then MMA Serum Quantitative will be added.

CPT Code(s):

82607 Vitamin B₁₂; if reflexed, add 83921 MMA

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