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Illinois Health Care Data Breach Exposes 600,000 Patients' Information

Illinois Health Care Data Breach Exposes 600,000 Patients' Information

First seen 4 Jan 2026, 00:27 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

The Illinois Department of Human Services reported a data breach affecting 600,000 patients. Names and addresses were made publicly viewable due to incorrect privacy settings from 2021 to 2025. The agency stated that several maps used for operational decisions were involved in this exposure.

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