Test Details
Mnemonic
B12BC
Ordering Code
3681540
CPT-4 Code(s)
82608
Specimen Information
Patient Preparation
Patient should fast 12 - 15 hours prior to collection. Avoid B12 supplements within 72 hours of collection.
Collect
Serum separator tube (SST)
Specimen Preparation
Centrifuge, separate serum from cells and send 1.0 mL serum in a screw capped plastic vial.
Alternate Specimen
Serum: Red top
Minimum Volume
0.1 mL
Transport Temperature
Refrigerated
Rejection Criteria
Plasma
Stability
Room temperature: 6 hours
Refrigerated: 7 days
Frozen: 30 days
Refrigerated: 7 days
Frozen: 30 days
Methodology
Quantitative Radioimmunoassay
Reference Range
800 - 2600 pg/mL
Performing Laboratory
ARUP Reference Laboratory
New York DOH Approval Status
Yes