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Northwestern Memorial HealthCare
ArchivedSubmitted 06/25/2021
Updated 23 hours ago ()
- State
- IL
- Covered entity type
- Healthcare Provider
- Individuals affected
- 201,197
- Business associate present
- Yes
- Type of breach
- Hacking/IT Incident
- 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), Northwestern Memorial HealthCare, reported that its business associate (BA) was the victim of a cyber-attack affecting the protected health information (PHI) of 201,197 individuals. The PHI involved included names, addresses, dates of birth, Social Security numbers, diagnoses, lab results, medications prescribed, and health insurance and other treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice on its website. The CE also established a call-center and provided credit monitoring and identity protection services for affected individuals. In response to the breach, the CE terminated its business relationship with its BA.
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.