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HelpTest Code Vit B12 Vitamin B12 Level
Patient Preparation
Fasting recommended
Collection Method
Venous collection
Minimum Volume
- Adult:1 mL
- Pediatric: 0.6 mL
Container
Lt Green / Plasma Separator / Lithium Heparin
Preferred Specimen
Light Green Top (lithium heparin) plasma
Acceptable Specimens
Serum:
- Gold Top SST
- Red Top
Plasma:
- Light Geen Top (lithium heparin)
- Purple or Pink Top (K2/K3 EDTA)
- Dark Green Top (sodium heparin)
Reference or Target Ranges
211– 911 pg/mL
Reportable Units
pg/mL
Critical Value
Not defined for this assay
Reasons for Rejection
| Hemolysis Threshold | 131 mg/dL |
| Icterus Threshold | 20 mg/dL |
| Lipemia Threshold | 3000 mL |
| Other | QNS, contaminated, improperly Labeled, improper specimen type |
Specimen Stability
| Ambient | Not listed, refrigerate ASAP |
| Refrigerated (4°C to 8°C) | Serum SST: 24 hours All other tubes: 48 hours |
| Frozen(-40°C to 0°C) | 2 weeks |
Performance Information
| Days and Time Performed | 24/7 |
| Expected Turn Around Time | Routine: 4 hours |
| Stat Availability | No |
| Performing Bench | UH Chemistry |
| Methodology/Method Description | Siemens Atellica - Immunoassay |
CPT Codes
82607