HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals) Primary notice
Posted on the HHS Office for Civil Rights breach portal with a submission date of April 8, 2024.
- Organization as reported
- Group Health Cooperative of South Central Wisconsin, WI
- Entity type as reported
- Health Plan
- Category as reported
Hacking/IT Incident
- Location of information as reported
- Network Server
- Submission date
- April 8, 2024
- Observed by BreachRecords
- 2026-10-18 16:15 UTC (revision 9985, row:1124)
- Archived copy
- Held in the private archive (provenance)
The covered entity (CE), Group Health Cooperative of South Central Wisconsin, reported that it was the subject of a ransomware attack that affected the protected health information (PHI) of 533,809 individuals. The PHI involved included names, Social Security numbers, addresses, dates of birth and medial record numbers. 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 implemented additional administrative, technical, and security safeguards. Staff were retrained on the requirement to protect and secure PHI.