Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

Cook County Health and Hospitals System

Disclosed Aug 20, 20107,081 affectedConfirmed

Official notice

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What is known

People affected7,081 (as reported to HHS)
DisclosedAug 20, 2010
AttackLost or stolen device
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Official noticeocrportal.hhs.gov
HHS OCR breach report (archive, resolved): Cook County Health & Hospitals System (Healthcare Provider, IL)

Notices filed

TotalAug 20, 2010
HHS archive7,081 people
TotalDec 17, 2010
HHS archive556 people

Other breaches at Cook County Health and Hospitals System

Hacking breachHacking exposed names and health records. Reported to the HHS archive.1.2M affectedHealthcareUSSep 24, 2023Insider breachInsider exposed names and health records. Reported to the HHS archive.727 affectedHealthcareUSOct 27, 2017Hacking breachHacking exposed names and health records. Reported to the HHS archive.23K affectedHealthcareUSJan 11, 2014
History of this record
records2026-09-25
556 to 7081by backfillSource
disclosed2026-09-25
2010-12-17 to 2010-08-20by backfillSource
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 Cook County Health and Hospitals System