Geisinger Medical Laboratories Test Catalog

Order Display Name: Geisinger Epic Procedure Code Or ID CPT Code:  


Geisinger Epic Procedure Code: LAB1942             Geisinger Epic ID: 26876

Specimen type:
Serum (preferred) or sodium citrate plasma
Preferred collection container:
Alternate Collection Container:
6 mL red-top (plain, non-serum separator) tube
2.7 mL blue-top (3.2% sodium citrate) tube
Specimen required:
0.5 mL serum (preferred) or sodium citrate plasma; minimum 0.2 mL.

Specimen processing instructions:
Allow serum to clot. Centrifuge and submit 0.5 mL serum or plasma. 
Transport temperature:
Refrigerated (preferred). Room temperature (stable 8 hours) and frozen specimens also acceptable.
Specimen stability:
Room temperature: 8 hours. 2-8°C: 48 hours. Frozen: 6 months.
Rejection criteria:
Specimen stability exceeded; specimen grossly hemolyzed.

Reference interval:
Negative <14 APL-U/mL
Interpretation guide:
Negative <14 APL-U/mL
Equivocal 14-20 APL-U/mL
Positive >20 APL-U/mL
Additional information:
Sodium citrate plasma has been validated for use with this assay for those patients ordered for Anti-Lupus Coagulation panels (LUPACP or LUPACC) without an available serum sample.
CPT code(s):
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.  The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Test includes:
Cardiolipin IgA antibody.
Enzyme Immunoassay (EIA)
CARDA, Cardiolipin antibody IgA
Antiphospholipid IgA antibody
ACA IgA antibody, ACL IgA antibody
Anticardiolipin IgA AB
Clinical significance:
The presence of cardiolipin antibodies when used in conjunction with clinical findings and other laboratory tests can aid in assessing the risk of thromboembolic disease in patients with systemic lupus erythematosus (SLE) or primary anti-phospholipid syndrome (APS).
Doctoral Director(s:)
Hoi-Ying Elsie Yu PhD, DABCC, FADLM    
Review Date: 12/13/2022

Performing Locations

Geisinger Medical Center

Performing laboratory: Immunology
Technical Lead: Kathy Hurst
Frequency: Two days per week, 1st shift.
Performed STAT? No
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