Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

Cook County Health and Hospitals System

Disclosed Jan 11, 201422,511 affectedConfirmed

Official notice

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What is known

People affected22,511 (as reported to HHS)
DisclosedJan 11, 2014
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

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

Notices filed

TotalJan 11, 2014
HHS archive22,511 people
TotalSep 15, 2014
HHS archive767 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, 2017Lost or stolen device breachLost or stolen device exposed names and health records. Reported to the HHS archive.7,081 affectedHealthcareUSAug 20, 2010
History of this record
records2026-09-25
767 to 22511by backfillSource
disclosed2026-09-25
2014-09-15 to 2014-01-11by 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