# Glutamic Acid Decarboxylase (GAD) Autoantibody

> This test measures the level of antibodies targeting glutamic acid decarboxylase (GAD), an enzyme found in the pancreas cells that make insulin. It helps show whether the immune system is mistakenly attacking the pancreas, which is a key indicator of type 1 diabetes. This distinction helps doctors differentiate autoimmune diabetes from type 2 diabetes. However, this test does not measure current blood sugar levels or determine how much insulin the body is still able to produce.

- Labcorp code: 143008
- 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=143008&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.