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.

Compliance Category

Standard

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