ARUP's Laboratory Test Directory
| 0055662: Vitamin B12 with Reflex to Methylmalonic Acid (MMA), Serum Quantitative |
| Test Mnemonic: B12 MMA | |
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Methodology: Chemiluminescent Immunoassay/Tandem Mass Spectrometry
Performed: Sun-Sat Reported: Next day for Vitamin B12; 4-6 days if MMA is performed |
| Specimen Required: | |
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Collect: One 7 mL plain red or SST.
Transport: 3 mL serum, frozen. (Min: 1.5 mL) Submit specimen in an ARUP Amber Transport Tube. Protect from light. Pediatric Collection/Transport: 2 mL serum, frozen. (Min: 1.5 mL) 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 |
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| Reference Interval: | |||||||||
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| 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 |