Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

Dean Health Systems, Inc.; St. Mary's Hospital; St. Marys Dean Ventures

Disclosed Dec 20, 20103,288 affectedConfirmed

Official notice

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What is known

People affected3,288 (as reported to HHS)
DisclosedDec 20, 2010
AttackLost or stolen device
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Official noticeocrportal.hhs.gov
HHS OCR breach report (archive, resolved): Dean Health Systems, Inc.; St. Mary's Hospital; St. Marys Dean Ventures (Healthcare Provider, WI)

Notices filed

TotalDec 20, 2010
HHS archive3,288 people
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 Dean Health Systems, Inc.; St. Mary's Hospital; St. Marys Dean Ventures