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Kaiser Permanente

Disclosed Apr 16, 201214 years agoConfirmed

Official notice

What is known

People affectedNot stated in the sources we have
DisclosedApr 16, 2012
HappenedAug 24, 2012
AttackNot stated
Data exposedNot stated
SectorOther · US
StatusConfirmed

Sources

Source
California Attorney General breach notice: KAISER PERMANENTEoag.ca.gov · Official notice
California Attorney General breach notice: Kaiser Permanenteoag.ca.gov · Official notice

Notices filed

WhereFiledPeople
California AGresidents of CAApr 16, 2012
California AGresidents of CAOct 29, 2012

Other breaches at Kaiser Permanente

BreachAffected
Tracking code on Kaiser websites and apps shared data of 13.4 million membersApr 25, 20242 years agoExposed dataUnverified13M
Disclosed Sep 26, 2019Sep 26, 20197 years agoHacking990
Stolen laptop held names and member numbers of 160,000 Kaiser membersJul 27, 200620 years agoLost or stolen deviceUnverified160K
History of this record
  • 2026-09-25 · disclosed: 2012-10-29 to 2012-04-16 · backfill source
  • 2026-09-25 · added · backfill source

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

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