# Basil

> This test measures the number of basophils in your blood, which are white blood cells that help your immune system manage allergic reactions and inflammation. It helps show whether your body is responding to an allergen or dealing with a chronic condition. This measurement assists in ruling out or monitoring specific blood disorders and autoimmune issues. However, this test cannot identify the exact cause of an immune response on its own and is usually analyzed alongside other blood cell counts.

- Labcorp code: 602809
- Category: [Allergies & Sensitivities](https://app.picardo.health/labs/tests/allergies-sensitivities.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=602809&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.