OSF HEALTHCARE SYSTEM
12 disclosures across 4 jurisdictions · 2021-10-01 → 2026-07-29. Severity score: 10 across 9 incidents (max per incident: crit=4 high=3 med=2 low=1; per-filing sum: 15).
1825-day window · this entity as victim
none in window
no clock evaluations
max per incident · per-filing sum: 15
Sector context · Healthcare
- This entity:
- no clock-evaluable filing
- Sector cohort:
- 19.2% on-time (n=2,370 clock verdicts)
Cohort: 9,572 filings from 4,213 organisations carrying NAICS 62 on the filing itself, same 1825-day window; merged entities counted once. Both percentages count clock verdicts through the same registry — a filing with no evaluable clock is excluded from both rather than counted as on time.
Compliance timing by regulator
Notice timing computed from the dates recorded in each filing — an indicative estimate from an automated clock, not a legal determination. Click any chip for this entity's source filings.
- HIPAA0 on-time · 0 late · 1 informational · 1
- Massachusetts0 on-time · 0 late · 1 informational · 1
- Leak gap8 leak preceded filing
us-federal — clock not computable from the dates recorded in the filings
us-mt — no notification-clock framework implemented for this jurisdiction
Discovery dates behind these clocks: 8 ag web form · 1 unattributed. Only a date the notification letter itself states is fully defensible; a date derived from another field makes the verdict indicative.
Regulators holding filings from this entity
Every regulator that has received a visible filing naming this entity, all time — filings first.
- Illinois State AG (11)
- HHS OCR (2)
- Montana State AG (2)
- HHS OCR enforcement (1)
- Massachusetts State AG (1)
Breach History (5-Year Lookback)
Historical incident recurrence, cumulative exposure, and per-jurisdiction compliance record
within lookback window
late notice filings
median days between incidents
Per-jurisdiction compliance record
| Jurisdiction | On-time | Late | Rate |
|---|---|---|---|
| us-il | 0 | 0 | — |
| us-ma | 0 | 0 | — |
Cumulative data type exposure
Disclosure timeline
Most-recent 100 filings. Click a row to open the disclosure detail.
| Filed | Source | Jurisdiction | Severity | Affected | Clocks missed |
|---|---|---|---|---|---|
| 2026-07-29 | ocr_enforcement | us-federal | Low | — | |
| 2024-10-01 | state_ag | us-il | Low | — | |
| 2024-02-01 | state_ag | us-il | Low | — | |
| 2023-01-01 | state_ag | us-il | Low | — | |
| 2023-01-01 | state_ag | us-il | Low | — | |
| 2023-01-01 | state_ag | us-il | Low | — | |
| 2023-01-01 | state_ag | us-il | Low | — | |
| 2023-01-01 | state_ag | us-il | Low | — | |
| 2023-01-01 | state_ag | us-il | Low | — | |
| 2021-10-01 | state_ag | us-mt | Medium | 2state | |
| 2021-10-01 | state_ag | us-ma | Medium | 5state | |
| 2021-10-01 | ocr | us-il | Medium | 53.9K |