Every public data breach

Disclosed this week47On record26,367

47 disclosed this week · 26,367 on record

Alameda Health System

Disclosed May 20, 202290,000 affectedConfirmed

Official notice

What is known

People affected90,000 (as reported to HHS)
DisclosedMay 20, 2022
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Official noticeocrportal.hhs.gov
HHS OCR breach report (archive, resolved): Alameda Health System (Healthcare Provider, CA)

Notices filed

TotalMay 20, 2022
HHS archive90,000 people

Other breaches at Alameda Health System

Hacking breachHacking exposed names and health records. Reported to the California AG.2,691 affectedHealthcareUSSep 15, 2020
History of this record
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 Alameda Health System