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HelpTest Code LAB4225 VITAMIN B12
Specimen Type
Preferred Sample: Lithium Heparin Plasma (Green/Mint Top)
Alternative Sample: Serum (SST, Gold, Tiger, Red Top TNO GEl)
Turnaround Time
STAT: 1 hour
Routine: 4 hours
Test Schedule
Daily
Sample Stability
Room Temp: 3 days
Refrigerated: 7 days
Method
Chemiluminescent microparticle immunoassay (CMIA)
Reference Ranges
| Age | Range |
|---|---|
| < 5 days | None |
| 5 days-1 year | 259-1576 pg/mL |
| 1-9 years | 283-1613 pg/mL |
| 9-14 years | 252-1125 pg/mL |
| 14-17 years | 244-888 pg/mL |
| 17-19 years | 203-811 pg/mL |
| > 19 years | 213-816 pg/mL |
Reporting limits
Measuring and reporting ranges: 148-2000 pg/mL
Synonyms
B-12, VB12, COBALAMIN, B12, LAB4225
CPT Codes
82607