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.
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.

No compliance statements are in use for this test.

Note
Hotline History
N/A
CPT Codes

82608

Components
Component Test Code* Component Chart Name LOINC
0070260 Vitamin B12 Binding Capacity 2171-7
* 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 click the sidebar link to access the Interface Map.
Aliases
  • B12, B12B
  • transcobalamin
Vitamin B12 Binding Capacity