GROUP HEALTH COOPERATIVE OF SOUTH CENTRAL WISCONSIN
bd_f89f7efae99505a4 · schema v1 · pii pii-v1
Full breach record for GROUP HEALTH COOPERATIVE OF SOUTH CENTRAL WISCONSIN →Group Health Cooperative of South Central Wisconsin (GHC-SCW) reported a data breach to the Wisconsin DATCP. The public was notified on 2024-02-09. The incident occurred on On or before January 25, 2024. Data accessed: Names, Social Security numbers, addresses, telephone numbers, e-mail addresses, dates of birth and/or death, member numbers, and Medicare and/or Medicaid numbers. 533,809 individuals were affected.
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Incident timeline
Jan 25, 2024
Begins
Feb 9, 2024
Filed
Linked disclosures
Why this link?Regulatory filings (3) · sorted by filing gap
- Massachusetts State AGbd_009d2e599b94c6382024-04-08 · +59dVerified
- HHS OCRbd_453e14285276c3d32024-04-08 · +59dVerified by operator
- Maine State AGbd_7d9f6fe2b75d08b82024-04-08 · +59dCandidate
Filing propagation · 4 filings · 3 states
View merged incident ↗Pattern: first filing Feb 9 (WI), last Apr 8 (ME) — a 59-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.