# Immunoglobulin A, Quantitative

> This test measures the level of Immunoglobulin A (IgA), an antibody that protects the linings of your nose, lungs, and intestines from germs. It helps doctors evaluate how well your immune system is working, which is useful if you have frequent respiratory or sinus infections. Results can help identify immune deficiencies or monitor specific blood disorders that affect antibody production. However, this test does not diagnose a specific illness on its own and must be reviewed alongside other health information.

- Labcorp code: 001784
- Category: [Immune Regulation](https://app.picardo.health/labs/tests/immune-regulation.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=001784&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.