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Health Plan of San Joaquin

Disclosed Dec 21, 20205 years ago418,842 affectedConfirmed

Official notice

The covered entity (CE), Health Plan of San Joaquin, reported that several employees were the victims of an email phishing scheme that affected the electronic protected health information (ePHI) of 418,842 individuals. The ePHI involved included names, Social Security numbers, drivers’ license numbers, health insurance information, claims and financial information, dates of birth, lab results, prescription information, and other treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice on its website. The CE also offered complimentary credit monitoring services. In response to the breach, the CE updated its email access protocols and implemented additional technical safeguards.

What is known

People affected418,842 (as reported to HHS)
DisclosedDec 21, 2020
HappenedSep 26, 2020
AttackHacking
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Source
California Attorney General breach notice: Health Plan of San Joaquinoag.ca.gov · Official notice
HHS OCR breach report (archive, resolved): Health Plan of San Joaquin (Health Plan, CA)ocrportal.hhs.gov · Official notice

Notices filed

WhereFiledPeople
HHS archivetotalDec 21, 2020418,842
California AGresidents of CAMay 18, 2021
History of this record
  • 2026-09-25 · attack: unknown to hacking · backfill source
  • 2026-09-25 · data_types: [] to ["names","health"] · backfill source
  • 2026-09-25 · records_basis: empty to hhs · backfill source
  • 2026-09-25 · records: empty to 418842 · backfill source
  • 2026-09-25 · disclosed: 2021-05-18 to 2020-12-21 · backfill source
  • 2026-09-25 · summary: empty to The covered entity (CE), Health Plan of San Joaquin, reported that several employees were the victims of an email phishing scheme that affected the electronic protected health information (ePHI) of 418,842 individuals. The ePHI involved inc · 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.

Everything about Health Plan of San Joaquin

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