ARUP's Laboratory Test Directory
| 0070150: Vitamin B12 |
| Test Mnemonic: B12 | |
|
Methodology: Chemiluminescent Immunoassay
Performed: Sun-Sat Reported: Within 24 hours |
| Specimen Required: | |
|
Collect: One 4 mL SST.
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 |