Every public data breach

44 disclosed this week · 26,355 on record

Wellmark Health Insurance

Disclosed May 26, 20266,666 affectedConfirmed

Official notice

The covered entity (CE), Wellmark Health Insurance, reported that an employee mailed the protected health information (PHI) of 6,666 individuals to the wrong recipients. The PHI involved included clinical information. The CE notified HHS, the media, and the affected individuals. In response to the breach, the CE retrained workforce members to better protect its PHI.

What is known

People affected6,666 (as reported to HHS)
DisclosedMay 26, 2026
AttackInsider
Data exposedNamesHealth
SectorInsurance · 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.

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