HHS OCR report ยท 2017
Cook County Health & Hospitals System data breach
OCR report facts
- Covered entity
- Cook County Health & Hospitals System
- Entity type
- Healthcare Provider
- State
- Illinois
- Individuals affected
- 727
- Submission date
- Oct 27, 2017
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Network Server
- Business associate present
- Yes
- Status
- Archive (closed)
OCR description
The covered entity (CE), Cook County Health & Hospitals System (CCHHS), reported that its business associate (BA), Experian Health (Experian), discovered an error in the upgrade of two billing platforms which resulted in the delivery of protected health information (PHI) to the wrong recipients. The PHI involved included names, dates of birth, treatment information, and health insurance information. This breach affected 727 individuals. CCHHS notified HHS, affected individuals, the media, ...
Text as published on the HHS OCR breach portal.
Other reports by Cook County Health & Hospitals System
| Covered entity | State | Entity type | Individuals | Submitted | Type of breach | Status |
|---|---|---|---|---|---|---|
| Cook County Health & Hospitals System | IL | Healthcare Provider | 22,511 | Jan 11, 2014 | Other | Archive (closed) |
| Cook County Health & Hospitals System | IL | Healthcare Provider | 556 | Dec 17, 2010 | Theft | Archive (closed) |
| Cook County Health & Hospitals System | IL | Healthcare Provider | 7,081 | Aug 20, 2010 | Theft | Archive (closed) |
Frequently asked questions
How many people were affected by the Cook County Health & Hospitals System data breach?
The report to HHS OCR lists 727 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Oct 27, 2017.
What type of breach was it?
The OCR portal lists the type of breach as Unauthorized Access/Disclosure, 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 Cook County Health & Hospitals 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 Cook County Health & Hospitals System.