- State
- IL
- Covered entity type
- Healthcare Provider
- Individuals affected
- 2,155
- Business associate present
- Yes
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Electronic Medical Record, Network Server
- First seen by InfoSec Signals
- Sep 23, 2026
- Last seen in OCR export
- Oct 25, 2026
OCR description
The covered entity (CE), Citadel of Northbrook, reported that its business associate (BA) experienced a data security incident that affected the protected health information (PHI) of 2,155 individuals. The PHI involved included clinical and demographic information. The CE notified HHS, the affected individuals, the media, and provided substitute notice. In response to the breach, the CE provided complimentary credit monitoring services to the affected individuals, and the CE and BA implemented additional administrative, technical, and security safeguards to better protect PHI.
Change history
- Oct 10, 2026Moved from current to archive, description updated
- Sep 23, 2026Added to OCR's under investigation 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.