Vitamin B12 Binding Capacity 
Mnemonic VITB12BIND
CPT 82608
Test Code 3502990
Synonyms Vitamin B12 Unsaturated Binding Capacity
Test Includes  
Specimen Serum
Volume 1.0 mL
Container SST or Red Top Tube
Special Instructions Patient should fast for 12-15 hours prior to collection. Vitamin B12 supplements should not be administered within 72 hours of drawing blood for this test.
Specimen Prep Centrifuge* For Red Top only, transfer serum to Plastic Transport Tube.
Storage Refrigerate
Transport Temp Refrigerated
Stability Rm Temp 6 hours
Stability Refrig 1 week
Stability Frozen 1 month
Methodology Quantitative Radioimmunoassay (RIA)
Rejection Criteria   
Reference Value 800 - 2600 pg/mL 
Performed/TAT Two times per week   Reported in 3-5 days