Meridian Health Plan of Illinois Data Breach History
WebsiteMeridian Health Plan of Illinois (Meridian of Illinois) is a Centene Corporation subsidiary providing government-sponsored Medicaid and Medicare health plans in Illinois.
This page shows all data breaches of Meridian Health Plan of Illinois. View the complete breach timeline, records exposed, root causes, and AI breach risk score. BreachHistory tracks disclosed data breaches worldwide.
Data Breach Timeline — All Meridian Health Plan of Illinois Breaches
Meridian Health Plan of Illinois Data Breach Summary
This page tracks the Meridian Health Plan of Illinois data breach history and cybersecurity incidents affecting Meridian Health Plan of Illinois (United States). BreachHistory currently indexes 1 publicly disclosed or catalogued incident spanning 2026, with approximately 21 thousand records reported as exposed across all indexed events. These totals may include overlapping datasets or third-party estimates and should not be interpreted as unique affected users.
The Meridian Health Plan of Illinois breach timeline includes major data breaches, cyber attacks, data leaks, credential exposures, API abuse, and other security incidents. Each incident provides details on the estimated records exposed, attack method, affected data types, and supporting public sources. Currently, 0 incidents are company-confirmed.
Largest Meridian Health Plan of Illinois Data Breaches
The largest indexed incidents include the 2026 Meridian Health Plan of Illinois — provider portal access flaw; 21,027 member…. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by Meridian Health Plan of Illinois or a regulator. Below is the list of large data breaches:
- 2026 2026 Meridian Health Plan of Illinois — provider portal access flaw; 21,027 members (Apr) — about 21.0K records exposed · Catalogued incident
What Information Was Exposed?
Depending on the incident, exposed data may include names, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.
Meridian Health Plan of Illinois Data Breach 2026
At the time of this update, BreachHistory catalogues 1 2026 incident related to Meridian Health Plan of Illinois. Most recent entry: 2026 Meridian Health Plan of Illinois — provider portal access flaw; 21,027 members (Apr). New incidents are added as official disclosures, regulatory filings, or credible cybersecurity reports become available.
What To Do If You Were Affected
If you believe your account may have been involved in a Meridian Health Plan of Illinois data breach, change any reused passwords, enable multi-factor authentication (MFA), monitor your account for suspicious activity, and be cautious of phishing emails or fake breach notifications.
This Meridian Health Plan of Illinois breach history is maintained by BreachHistory using public disclosures, regulatory filings, security research, and clearly labelled third-party claims. For the complete breach timeline, records exposed, incident details, and AI Breach Risk Score, explore the sections on this page.