# Adrenal 21-Hydroxylase Autoantibodies (Endocrine Sciences)

> This test looks for specific antibodies in your blood that attack the 21-hydroxylase enzyme found in your adrenal glands. It helps show whether your immune system is mistakenly damaging these glands, which is a primary cause of Addison's disease. This result helps distinguish autoimmune causes of adrenal insufficiency from other types of adrenal failure. However, the presence of these antibodies does not tell doctors how much damage has occurred or diagnose other autoimmune disorders on its own.

- Labcorp code: 504805
- 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=504805&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.