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Vitamin B12
MessageChemistry
Test Code
LAB67
Alias/See Also
Folate
CPT Codes
82607
Includes
Vitamin B12
Preferred Specimen
Gold top (serum separator tube)
Minimum Volume
Whole blood: 700 uL (TWO full red-top microtainers or two full light green-top microtainer).
Serum/plasma: 400 uL
Serum/plasma: 400 uL
Other Acceptable Specimens
Red Top and light green top (lithium heparin plasma) acceptable
Instructions
If Vitamin B12 level is less than 239 pg/mL, follow-up testing for
Intrinsic Factor Blocking Antibody @MYO (B12IF) is recommended. No hemolysis.
Intrinsic Factor Blocking Antibody @MYO (B12IF) is recommended. No hemolysis.
Specimen Stability
Ambient: not recommended.
Refrigerated: 7 days
Frozen: up to 4 weeks
Refrigerated: 7 days
Frozen: up to 4 weeks
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Turbid Samples
Hemolyzed Samples
Hemolyzed Samples
Setup Schedule
Everyday
Report Available
Same day
Reference Range
239-931 pg/mL
Performing Laboratory
Hoag Newport
