Data Breach WatchDBW

Healthcare

Medium

investigation open

Updated about 1 month ago

Meridian Health Plan of Illinois Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving Meridian Health Plan of Illinois.
•Discovered on July 14, 2026.
•Possible data exposed: Names, Member ID numbers, Dates of birth, Contact information, Eligibility details, Claims-related details.
•Affects individuals in: Illinois.
•Confirmation level: Confirmed by company.

Breach confirmed

The Meridian Health Plan of Illinois breach is confirmed. If you may be affected, add your details below and we will take it from there.

Detailed summary

Meridian Health Plan of Illinois, a subsidiary of Centene Corporation, reported a data breach in April 2026. This incident involved unauthorized access to Meridian’s online system by a provider, potentially allowing an actor to view or download member information. An online notice regarding the breach was made public on June 17, 2026.

The breach affected 21,027 individuals. Exposed data types include names, member ID numbers, dates of birth, contact information, and eligibility or claims-related details. The company confirmed that Social Security numbers and financial account numbers were not compromised. The states affected include Illinois, where Meridian serves Medicaid enrollees.

Details will continue to emerge as the investigation progresses, and further information may become available regarding the extent of the breach and any additional notifications.

Data possibly involved

Names
Member ID numbers
Dates of birth
Contact information
Eligibility details
Claims-related details

Company Response Timeline

Response Grade

Notified consumers within 31–60 days

Breach Occurred

Apr 28, 2026

Company Discovered

Apr 28, 2026

Regulator Notified

Unknown

Consumers Notified

Jun 17, 2026

0 days to discover

50 days to notify consumers

Breach Verification Status

Reports Only

Complete

Initial dark web reports of potential breach

Company Confirmed

Current

Company has acknowledged the breach

Regulator Confirmed

Confirmed by regulatory authorities

Note: Breach verification can take time. Information may evolve as more details become available from companies and regulators.

Case Status:

Investigation Open

We're actively investigating this case and seeking affected individuals.

Were you affected? Submit your information below.

Were You Affected By This Breach?

If you are a customer or have received a data breach notification, you may submit your information as part of our ongoing investigation. Submitting your information is free and does not obligate you.

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Check Your Risk Level

Answer a few questions to understand how this breach might affect you

Do you use Meridian Health Plan of Illinois?

Yes

What state are you in?

What should I do?

Change your passwords

Update passwords for the affected service and any accounts using the same password

Enable two-factor authentication

Add an extra layer of security to your accounts

Monitor your accounts

Watch for suspicious activity on your financial and online accounts

Watch for phishing attempts

Be cautious of emails or messages claiming to be from the affected company

Consider a credit freeze

Prevent unauthorized access to your credit report

Scan your email for other exposures

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