# Diphtheria Antitoxoid Antibodies

> This test measures the amount of antibodies in your blood that protect against the toxin produced by diphtheria bacteria. It helps show whether your immune system has built enough defense against the disease, typically following a vaccination. Doctors use these results to evaluate how well your immune system responds to vaccines or to determine if you are currently protected. This test does not diagnose an active diphtheria infection.

- Labcorp code: 163709
- Category: [Infections](https://app.picardo.health/labs/tests/infections.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=163709&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.