HHS OCR report ยท 2020
OSF HealthCare System data breach
OCR report facts
- Covered entity
- OSF HealthCare System
- Entity type
- Healthcare Provider
- State
- Illinois
- Individuals affected
- 94,171
- Submission date
- Oct 19, 2020
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- Yes
- Status
- Archive (closed)
OCR description
The covered entity (CE), OSF HealthCare System, reported that its business associate experienced a ransomware attack affecting the electronic protected health information (ePHI) of 94,171 individuals. The ePHI involved included names, addresses, phone numbers, email addresses, dates of birth, and treatment information. The CE notified HHS, affected individuals, the media, and provided a telephone number for questions or concerns.
Text as published on the HHS OCR breach portal.
Other reports by OSF HealthCare System
| Covered entity | State | Entity type | Individuals | Submitted | Type of breach | Status |
|---|---|---|---|---|---|---|
| OSF HealthCare System | IL | Healthcare Provider | 53,907 | Oct 1, 2021 | Hacking/IT Incident | Archive (closed) |
Frequently asked questions
How many people were affected by the OSF HealthCare System data breach?
The report to HHS OCR lists 94,171 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Oct 19, 2020.
What type of breach was it?
The OCR portal lists the type of breach as Hacking/IT Incident, with the breached information located in: Network Server.
Is the investigation still open?
No. The report is in the OCR portal archive, which holds reports where OCR has closed its review.
Is a breach notice letter from OSF HealthCare System legitimate?
This site cannot verify letters. Check the sender against the organisation's official website and the HHS OCR breach portal, and avoid calling numbers or clicking links only listed in an unexpected message. See our guide on what to do after a data breach notice.
Source: HHS OCR Breach Portal, OCR export October 2026. Network USA is not affiliated with HHS or OSF HealthCare System.