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Breaches.

Alameda Health System

Disclosed Sep 15, 20206 years ago2,691 affectedConfirmed

Official notice

What is known

People affected2,691 (as reported to HHS)
DisclosedSep 15, 2020
HappenedApr 30, 2020
AttackHacking
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Source
California Attorney General breach notice: Alameda Health Systemoag.ca.gov · Official notice
HHS OCR breach report (archive, resolved): Alameda Health System (Healthcare Provider, CA)ocrportal.hhs.gov · Official notice

Notices filed

WhereFiledPeople
HHS archivetotalSep 15, 20202,691
California AGresidents of CAOct 22, 2020
California AGresidents of CAJun 24, 2022

Other breaches at Alameda Health System

BreachAffected
Disclosed May 20, 2022May 20, 20224 years agoHacking90K
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 2691 · backfill source
  • 2026-09-25 · disclosed: 2020-10-22 to 2020-09-15 · backfill source
  • 2026-09-25 · disclosed: 2022-06-24 to 2020-10-22 · 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 Alameda Health System

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