Vitamin B12
0070150
Ordering Recommendation
Aids in detection of vitamin B12 deficiency in individuals with macrocytic or unexplained anemia, or unexplained neurologic disease.
Mnemonic
B12
Methodology
Quantitative Chemiluminescent Immunoassay
Performed
Sun-Sat
Reported
Within 24 hours  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
  
Collect
Serum separator tube. Also acceptable: Green (sodium or lithium heparin).  
Specimen Preparation
Protect from light during collection, storage, and shipment. Allow specimen to clot completely at room temperature. Transfer 1 mL serum or plasma to an ARUP Amber Transport Tube. (Min: 0.5 mL)  
Storage/Transport Temperature
Frozen.  
Unacceptable Conditions
EDTA plasma. Hemolyzed specimens.  
Remarks
  
Stability
After separation from cells: Ambient: 8 hours; Refrigerated: 24 hours; Frozen: 3 months  
Reference Interval
Effective December 2, 2013
180-914 pg/mL  
Interpretive Data
 
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
Components
Component Test Code*Component Chart NameLOINC
0070150Vitamin B122132-9
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • B12 Assay
  • B12 Vitamin
  • B12, Serum
  • CblC
  • Cobalamin
  • Methylcobalamin
  • Vit B12