Kaiser Permanente

Disclosed Sep 26, 2019990 affectedConfirmed

The covered entity (CE), Kaiser Permanente in Oakland, California, reported that an employee was the victim of an email phishing scheme that affected the electronic protected health information of 990 individuals. The ePHI involved included names, birthdates, gender, diagnoses, health insurance information, clinical information, and other treatment information. The CE notified HHS, affected individuals, and the media. In its mitigation efforts, the CE implemented additional administrative, technical, and security safeguards to better protect its ePHI. OCR provided technical assistance to the CE regarding the HIPAA Security Rule.

What is known

People affected	990 (as reported to HHS)
Disclosed	Sep 26, 2019
Happened	Aug 12, 2019
Attack	Hacking
Data exposed	NamesHealth
Sector	Healthcare · US
Status	Confirmed

Sources

Official noticeoag.ca.gov

California Attorney General breach notice: Kaiser Permanente

Official noticeocrportal.hhs.gov

HHS OCR breach report (archive, resolved): Kaiser Permanente (Healthcare Provider, CA)

Notices filed

Residents of CASep 26, 2019

California AGCount not stated

TotalSep 26, 2019

HHS archive990 people

Other breaches at Kaiser Permanente

Tracking code on Kaiser websites and apps shared data of 13.4 million membersExposed data exposed names, IP addresses and health records.Exposed data13M affectedHealthcareUSUnverifiedApr 25, 2024 Breach, details not statedBreach notice filed with the California AG, details not stated.USApr 16, 2012 Stolen laptop held names and member numbers of 160,000 Kaiser membersLost or stolen device exposed names, phone numbers and insurance details.Lost or stolen device160K affectedHealthcareUSUnverifiedJul 27, 2006

History of this record

sector2026-09-25

other to healthby backfillSource

attack2026-09-25

unknown to hackingby backfillSource

data_types2026-09-25

[] to ["names","health"]by backfillSource

records_basis2026-09-25

empty to hhsby backfillSource

records2026-09-25

empty to 990by backfillSource

summary2026-09-25

empty to The covered entity (CE), Kaiser Permanente in Oakland, California, reported that an employee was the victim of an email phishing scheme that affected the electronic protected health information of 990 individuals. The ePHI involved includedby backfillSource

Added2026-09-25

First recordedby backfillSource

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

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