Days Set Up
Monday, Wednesday, Friday
Analytic Time

4 - 6 days

Soft Order Code

Test Updated:


Phospholipid (Cardiolipin) Antibody IgA
IgA Phospholipid Antibody (APL)
aCL Antibody

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Test Overview

Test Methodology

Enzyme-Linked Immunosorbent Assay (ELISA)

Test Usage

IgA cardiolipin antibody is occasionally detected in SLE and SLE-like patients and appears to be most commonly associated with cerebrovascular thrombosis.

Reference Range

<15 APL (negative), 15.0 – 39.9 APL (weakly positive), 40.0 – 79.9 APL (positive), > or =80.0 APL (strongly positive). APL refers to IgA Phospholipid Units. One APL unitis 1 microgram of IgA antibody.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Yellow Top Tube
Normal Volume
0.5 mL serum
Minimum Volume
0.4 mL serum

Billing Information

CPT Code
Pro Fee Code

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.