OSF HEALTHCARE SYSTEM
bd_c91f7fe398e53001 · schema v1 · pii pii-v2
Full breach record for OSF HEALTHCARE SYSTEM →10 incidents on fileOSF HEALTHCARE SYSTEM filed a data-breach notice with the Illinois Attorney General during 2021 (case 21-485). The register records the breach as discovered on April 23, 2021. Illinois does not publish the number of people affected — 815 ILCS 530/10 permits the Attorney General to publish only the entity name, the types of personal information and the date range.
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Incident timeline — partial
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Breach window unknown
Jan 1, 2021
Filed
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Corroborated · see linked filings
Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.
Linked disclosures
Why this link?Ransomware claims (1)
- Leak Sitexinglockerbd_f8ace411af1e1abf2021-05-18 · +137dVerified by operator
Regulatory filings (7) · sorted by filing gap
- Illinois State AGbd_14299358f0ba63fe2021-01-01Verified by operator
- Montana State AGbd_08d288f3d1ac951e2020-10-19 · +74dCandidate
- HHS OCRbd_83807d832a08bc802020-10-19 · +74dVerified
- Montana State AGbd_642aeb97e779372a2021-10-01 · +273dVerified by operator
Show 3 more filings ↓Show fewer ↑up to 2035d gap
- Massachusetts State AGbd_b288deb4577e5ece2021-10-01 · +273dVerified
- HHS OCRbd_bf20565c237987762021-10-01 · +273dVerified by operator
- HHS OCR enforcementbd_7fbc6210e9c1f4d52026-07-29 · +2035dVerified by operator
Filing propagation · 8 filings · 3 states
View merged incident ↗Pattern: first filing Oct 19 (MT), last Jul 29 — a 2109-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.