Vitamin B12 Binding Capacity, Unsaturated (Transcobalamin) : 928

Test Code
VB12Q or 928

Alias/See Also
Transcobalamin, B12 Binding Capacity

CPT Codes

Serum separator tube or plain red.

Transport Container
Centrifuge the serum separator tube and transport. If plain red, centrifuge and aliquot 1 mL serum (Min: 0.2 mL) into a standard transport tube.

Transport Temperature

Specimen Stability
Ambient: 4 days; Refrigerated: 4 days; Frozen: 30 days

Radiobinding Assay

Setup Schedule
Tuesday & Thursday

Report Available
2-7 days (From receipt at performing laboratory)

Reference Range
Adults 650-1340 pg/mL

Clinical Significance
Vitamin B12 Binding Capacity, Unsaturated (Transcobalamin), binds and transports vitamin B12 in the circulation. Increased concentrations are associated with patients with myeloproliferative disorders. Decreased concentrations are seen in individuals with megaloblastic anemia or Transcobalamin deficiency.

Performing Laboratory
Quest Diagnostics

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.