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HelpTest Code LAB67 Vitamin B12
Useful For
Investigating the presence and etiology of anemia
Methodology
Electrochemiluminescence Immunoassay (ECLIA)
Performing Laboratory
Bozeman Health Laboratory Services
Specimen Requirements
Specimen Type: Plasma or serum
Container/Tube: Light-green top (lithium heparin gel), red top, or gold top
Specimen Volume: 1 mL
Specimen Minimum Volume: 0.5 mL
Collection Instructions:
- Patient should be fasting.
- Spin down and refrigerate serum/plasma within 2 hours of collection.
Specimen Rejection:
1. Grossly hemolyzed samples will be rejected.
2. Samples with extremely high total protein concentrations will be rejected.
Additional Information
Samples with extremely high total protein concentrations are not suitable for use in this assay. Hyperproteinemia can be found in Lymphoma, bone marrow disorders such as multiple myeloma, monoclonal gammopathy of undetermined significance (MGUS), Waldenström macroglobulinemia, plasmocytoma and amyloidosis.
Specimen Transport Temperature
Refrigerated
Specimen Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Plasma | Ambient | 2 hours |
| Refrigerated | 48 hours | |
| Frozen | 56 days | |
| Serum | Ambient | 2 hours |
| Refrigerated | 24 hours | |
| Frozen | 56 days |
Reference Values
232-1245 pg/mL
Note: Results >2000 pg/mL will be reported as >2000 pg/mL.
Day(s) Test Set Up
Monday through Friday
Test Classification and CPT Coding
82607