# Anticardiolipin Antibodies (ACA), IgG, Quantitative

> This test measures the level of anticardiolipin antibodies, which are proteins produced by the immune system that mistakenly attack substances found on cell membranes. It is often used to investigate the cause of unexplained blood clots or recurrent miscarriages. The results help show whether you may have antiphospholipid syndrome, a condition that increases the risk of clotting. However, a single positive result cannot confirm a diagnosis on its own, as these antibodies can also appear temporarily during common infections.

- Labcorp code: 161810
- Category: [Autoimmunity](https://app.picardo.health/labs/tests/autoimmunity.md)
- Price: shown at checkout, before payment.
- Blood draw: free at a Labcorp location, or $75.00 at home.
- Order link: https://app.picardo.health/labs/order?tests=161810&ref=assistant

## About ordering

A licensed physician reviews every order before any test is run, and results arrive in the person's Picardo account. Ordering is open to adults 18 and over in the US, except New York, New Jersey, Rhode Island, Pennsylvania, Maryland, Massachusetts, Hawaii and Maine. General health information, not medical advice.