Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

AltaMed Health Services

Disclosed Jun 13, 20254,530 affectedConfirmed

Official notice

What is known

People affected4,530 (as reported to HHS)
DisclosedJun 13, 2025
HappenedNov 27, 2025
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Official noticeoag.ca.gov
California Attorney General breach notice: AltaMed Health Services
Official noticeocrportal.hhs.gov
HHS OCR breach report: AltaMed Health Services (Healthcare Provider, CA)

Notices filed

Residents of CAJun 13, 2025
California AGCount not stated
TotalJun 13, 2025
HHS OCR4,530 people
Residents of CAFeb 12
California AGCount not stated
TotalFeb 26
HHS OCR501 people

Other breaches at AltaMed Health Services

Breach, details not statedBreach notice filed with the California AG, details not stated.HealthcareUSJun 29, 2023Hacking breachHacking exposed names and health records. Reported to the California AG.6,000 affectedHealthcareUSFeb 15, 2019Lost or stolen device breachLost or stolen device exposed names and health records. Reported to the California AG.3,206 affectedHealthcareUSAug 29, 2014
History of this record
records2026-09-25
501 to 4530by 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 501by backfillSource
disclosed2026-09-25
2026-02-12 to 2025-06-13by 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.

Everything about AltaMed Health Services