Vitamin B12 Binding Capacity
0070260
Ordering Recommendation
Mnemonic
B12B
Methodology
Quantitative Radioimmunoassay
Performed
Mon, Thu
Reported
1-5 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
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. 
Collect
Serum separator tube or plain red. 
Specimen Preparation
Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.1 mL) 
Storage/Transport Temperature
Refrigerated. 
Unacceptable Conditions
Plasma. 
Remarks
 
Stability
After separation from cells: Ambient: 6 hours; Refrigerated: 1 week; Frozen: 1 month 
Reference Interval
800-2600 pg/mL
Interpretive Data
This assay measures the unsaturated binding capacity of serum for vitamin B12.

Note
Hotline History
N/A
CPT Code(s)
82608
Components
Component Test Code*Component Chart NameLOINC
0070260Vitamin B12 Binding Capacity2171-7
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please view this test within the Laboratory Test Directory found at www.aruplab.com
Aliases
  • B12, B12B
  • transcobalamin