Vitamin B12, Serum

Test Code
B12

CPT Codes
82607

Preferred Specimen
1 mL serum

Minimum Volume
0.3 mL

Instructions
Minimize exposure to light. Avoid freezing and thawing.

Transport Container

Plastic screw-cap vial



Transport Temperature
Refrigerated (cold packs)

Specimen Stability
Room temperature: 7 days
Rrefrigerated: 7 days
Frozen: 28 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Hemolysis



Methodology
Immunoassay (IA)

Reference Range
≤4 Years Not established
5-9 Years 250-1205 pg/mL
10-17 Years 260-935 pg/mL
>17 Years 200-1100 pg/mL


Clinical Significance
Vitamin B12 is decreased in pernicious anemia, total or partial gastrectomy, malabsorption and certain congenital and biochemical disorders.

Performed By
Quest Diagnostics Nichols Institute



The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.