Individual test · Labcorp 001784

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.