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HelpTest Code B12 Vitamin B12, Serum
Additional Codes
LAB67
Performing Laboratory
Central Peninsula Hospital
Collection Instructions
Samples should not be taken from patients receiving therapy with high biotin doses (i.e. >5 mg/day) until at least 8 hours following the last biotin administration.
Collection Method
Venipuncture
Container
Serum (SST or red top tube)
Specimen Type
Preferred
- Serum- Gold Top SST or Red Top
Acceptable
- Plasma- Light Green Top (Lithium heparin)
Minimum Volume
0.5ml
Specimen Stability
| Ambient | 2 hours |
| Refrigerated (4°C to 8°C) | 48 hours |
| Frozen(-40°C to 0°C) | 8 weeks |
Reference or Target Ranges
| Age | Male | Female |
| All ages | 211-946 | 211-946 |
Reportable Units
pg/mL
Critical Value
Not defined for this assay
Reasons for Rejection
| Hemolysis Threshold | 400 mg/dL |
| Icterus Threshold | 65 mg/dL |
| Lipemia Threshold | 1500 mg/dL |
| Other | QNS, contaminated, improperly labeled, improper specimen type |
Performance Information
| Days and Time Performed | 24/7 |
| Expected Turn Around Time |
Stat: 1 hour Routine: 4 hours |
| Stat Availability | Yes |
| Performing Bench | CPH Chemistry |
| Methodology/Method Description | Roche Cobas |
CPT Codes
82607
Last review/edit date
2025