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Cook County Health & Hospitals System
ArchivedSubmitted 10/27/2017
Updated 14 hours ago ()
- State
- IL
- Covered entity type
- Healthcare Provider
- Individuals affected
- 727
- Business associate present
- Yes
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Network Server
- First seen by InfoSec Signals
- Sep 23, 2026
- Last seen in OCR export
- Oct 25, 2026
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, and provided substitute notice. To mitigate this issue, Experian reverted back to its older billing platform to rectify this issue.
Change history
- Sep 23, 2026Added to OCR's archive list
Source: HHS OCR Breach Portal, U.S. Department of Health and Human Services, Office for Civil Rights about this source
Records are reproduced as published; entity names and figures are OCR's.