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Wisconsin Department of Health Services

Disclosed Jun 21, 20242 years ago19,150 affectedConfirmed

Official notice

The covered entity (CE), Wisconsin Department of Health Services, reported that its business associate (BA) experienced a cyberattack that compromised the protected health information (PHI) of 19,150 individuals. The PHI involved included names, dates of birth, social security numbers, diagnoses/conditions, and other treatment information. The CE notified HHS and the media; the BA notified the affected individuals. In its mitigation efforts, the CE provided credit monitoring and established a call center for questions and concerns. The BA implemented additional administrative and technical safeguards to better protect sensitive data.

What is known

People affected19,150 (as reported to HHS)
DisclosedJun 21, 2024
AttackHacking
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

WhereFiledPeople
HHS archivetotalJun 21, 202419,150

Other breaches at Wisconsin Department of Health Services

BreachAffected
Disclosed Jul 1, 2026Jul 12 months agoInsider8,157
Disclosed Jan 15, 2021Jan 15, 20215 years agoInsider12K
Disclosed Apr 3, 2018Apr 3, 20188 years agoLost or stolen device779
History of this record
  • 2026-09-25 · added · backfill source

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

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