---
title: "Direct Antiglobulin Test (DAT): What It Measures"
description: "A DAT checks whether antibodies are stuck to your red blood cells, which can point to immune-related hemolysis; order through Vitals Vault with Quest draw."
canonical: "https://www.vitalsvault.com/biomarkers/direct-antiglobulin-test-dat"
last-updated: 2026-08-22
---

# Direct Antiglobulin Test (DAT): What It Measures

> A DAT checks whether antibodies are stuck to your red blood cells, which can point to immune-related hemolysis; order through Vitals Vault with Quest draw.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/direct-antiglobulin-test-dat
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