Beta2-Glycoprotein IgM 36553

Test Code

Alias/See Also

CPT Codes

Preferred Specimen
1 mL platelet-poor plasma collected in a 3.2% sodium citrate (light blue-top) tube

Minimum Volume

Other Acceptable Specimens

Draw RED top, remove serum and send in plastic screw cap vial at  room temperature

Transport Container

Transport Temperature

Specimen Stability
Room temperature: 5 days
Refrigerated: 14 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic

Immunoassay (IA)

Setup Schedule
Set up: Mon-Sat p.m.; Report available: Next day

Factor VIII inhibitors may cause a false-positive lupus anticoagulation test. The temporary presence of antiphospholipid antibodies may accompany infections or certain drugs.

Reference Range
≤20 SMU

Clinical Significance
Beta-2-Glycoprotein 1, apolipoprotein H, is a cofactor in antiphospholipid antibody binding and is the critical antigen in the antiphospholipid antibody syndrome. Beta-2- Glycoprotein 1 antibody is more specific than cardiolipin antibody that may express reactivity in patients with syphilis and other infectious diseases.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

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.