Every public data breach

47 disclosed this week · 26,367 on record

Eau Claire Cooperative Health

Disclosed Jul 29, 20213,755 affectedConfirmed

Official notice

The covered entity (CE), Eau Claire Cooperative Health dba Cooperative Health, reported that its business associate (BA) experienced a cyber-attack that compromised the electronic protected health information (ePHI) of 3,755 individuals. The ePHI involved included names, dates of birth, prescription information, and medical record numbers. The BA notified affected individuals and the media; the CE notified OCR. In its mitigation efforts, the BA implemented additional administrative, technical, and security safeguards to better protect ePHI. OCR provided technical assistance to the CE regarding the HIPAA Breach Notification and Privacy Rules.

What is known

People affected3,755 (as reported to HHS)
DisclosedJul 29, 2021
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

History of this record
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (HHS archive), confirmed by HHS OCR. Record counts are as reported. Not legal advice.

Everything about Eau Claire Cooperative Health