People search Meridian Health Plan of Illinois data breach timeline because the brand sits on billions of accounts, credentials, and cloud workloads. BreachHistory indexes 1 Meridian Health Plan of Illinois-linked incident (1 company-confirmed), with headline counts up to 21K+ in catalog rows. This page maps every attested event through 2026 with internal links to canonical records.
Why Meridian Health Plan of Illinois breach history matters
Meridian Health Plan of Illinois operates in Healthcare / Health Insurance (United States). Across indexed rows, recurring themes include unverified actor or scraping claims. Understanding the chronological pattern helps security teams, customers, and regulators separate confirmed disclosures from forum marketing.
Full timeline through 2026
2026 — provider portal access flaw; 21,027 members (Apr)
Verified breach. Verified health-plan data breach — disclosed June 2026. Meridian Health Plan of Illinois (Meridian of Illinois), a Centene Corporation subsidiary providing government-sponsored Medicaid and Medicare plans, learned April 28, 2026 of an incident in how some providers were given access to its online system that may have allowed an unauthorized actor to view or download member information. Meridian disabled involved accounts, notified law enforcement, and posted an online notice June 17, 2026. The U.S. HHS Office for C Exposed categories include Per Meridian online notice June 17, 2026: varying by individual—member names, Member ID numbers, dates of birth, contact information, and limited eligibility or claims-related deta. BreachHistory cites approximately 21K+ affected records in this row. See the meridian-illinois-portal 2026 record and canonical BreachHistory entry.
Patterns and analysis
- Unverified actor or scraping claims — appears across multiple Meridian Health Plan of Illinois catalog entries; prioritize controls that address this class of failure.
- Record-count hygiene — BreachHistory indexes actor-cited figures separately from company-confirmed totals; read each row's technicalWriteup before treating counts as fact.
- 2026 monitoring — New disclosures roll into this timeline as they are verified or labeled unverified per catalog policy.
What to do if you may be affected
- Step 1: Enable phishing-resistant MFA on every account tied to this brand.
- Step 2: Use unique passwords and a password manager—breach rows often involve credential reuse.
- Step 3: Monitor official company breach notices and regulator filings, not dark-web downloads.
- Step 4: Bookmark the Meridian Health Plan of Illinois company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/meridian-health-plan-of-illinois · Latest: meridian-illinois-portal2026.
Sources: BreachHistory catalog (1 row for Meridian Health Plan of Illinois), company and regulator disclosures cited in individual breach records.