VITAMIN B12 (CYANOCOBALAMIN)

Specimen Required
Draw blood in a SST. Centrifuge, separate and send 1.0 mL serum (0.5 mL minimum) refrigerated in a screw-capped plastic vial.

Alternate Specimen
Plasma: EDTA
Serum: Red-top

Rejection Criteria
Grossly hemolyzed or grossly lipemic specimens, heparin plasma

Methodology
Immunoassay

Stability
Room temperature: 7 days; Refrigerated: 7 days; Frozen: 28 days

Reference Range
By report

Performed
Tuesday-Saturday

Turnaround Time2-4 days
Test CodeB12
CPT-4 Code (s)
82607
LOINC Codes
2132-9

Warde
Medical
Laboratory