AltaMed Health Services

Disclosed Jun 13, 20251 year ago4,530 affectedConfirmed

Official notice

What is known

People affected	4,530 (as reported to HHS)
Disclosed	Jun 13, 2025
Happened	Nov 27, 2025
Attack	Hacking
Data exposed	Names, Health
Sector	Healthcare · US
Status	Confirmed

Sources

Source	Kind
California Attorney General breach notice: AltaMed Health Servicesoag.ca.gov · Official notice	Official notice
HHS OCR breach report: AltaMed Health Services (Healthcare Provider, CA)ocrportal.hhs.gov · Official notice	Official notice

Notices filed

Where	Filed	People
California AGresidents of CA	Jun 13, 2025
HHS OCRtotal	Jun 13, 2025	4,530
California AGresidents of CA	Feb 12
HHS OCRtotal	Feb 26	501

Other breaches at AltaMed Health Services

Breach	Disclosed	Attack	Sector	Status	Affected
Disclosed Jun 29, 2023Jun 29, 20233 years ago	Jun 29, 20233 years ago	Not stated	Healthcare	Confirmed	Unknown
Disclosed Feb 15, 2019Feb 15, 20197 years agoHacking	Feb 15, 20197 years ago	Hacking	Healthcare	Confirmed	6,000
Disclosed Aug 29, 2014Aug 29, 201412 years agoLost or stolen device	Aug 29, 201412 years ago	Lost or stolen device	Healthcare	Confirmed	3,206

History of this record

2026-09-25 · records: 501 to 4530 · backfill source
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 501 · backfill source
2026-09-25 · disclosed: 2026-02-12 to 2025-06-13 · 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 AltaMed Health Services

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