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Cardiolipin Antibody, IgA Ordering Recommendation Preferred second-line test when seronegative antiphospholipid syndrome (APS) is strongly suspected. Order incrementally or concurrently with other noncriteria antiphospholipid antibody tests. Mnemonic CARDIO IGA Performed Mon-Sat Methodology Semi-Quantitative Enzyme-Linked Immunosorbent Assay Reported 1-2 days New York DOH Approval Status This test is New York DOH approved. Specimen Required Patient Preparation: Collect: Serum separator tube. Specimen Preparation: Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to a Standard Transport Tube. (Min: 0.3 mL) Storage/Transport Temperature: Refrigerated. Unacceptable Conditions: Plasma or other body fluids. Contaminated, heat-inactivated, hemolyzed, or lipemic specimens. Remarks: Stability: After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles) Reference Interval <=12 MPL Negative 13-19 MPL Indeterminate 20-80 MPL Low to Moderately Positive 81 MPL or above High Positive Interpretive Data The persistent presence of IgG and/or IgM cardiolipin (CL) antibodies in moderate or high levels (greater than 40 GPL and/or greater than 40 MPL units) is a laboratory criterion for the diagnosis of antiphospholipid syndrome (APS). Persistence is defined as moderate or high levels of IgG and/or IgM CL antibodies detected in two or more specimens drawn at least 12 weeks apart (J Throm Haemost. 2006;4:295-306). Lower positive levels of IgG and/or IgM CL antibodies (above cutoff but less than 40 GPL and/or less than 40 MPL units) may occur in patients with the clinical symptoms of APS; therefore, the actual significance of these levels is undefined. Results should not be used alone for diagnosis and must be interpreted in light of APS-specific clinical manifestations and/or other criteria phospholipid antibody tests. Compliance Category: FDA Note MPL = IgM phospholipid units CPT Code 86147 Components Component Chart Name Cardiolipin Antibody IgM Component Test Code 0050902 LOINC 3182-3 Aliases ACA aCL aCL Antibody aCL IgG Anti-Cardiolipin Anticardiolipin Anticardiolipin Antibodies Cardiolip