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American Addiction Centers

Disclosed Nov 25, 20241 year ago422,424 affectedConfirmed

Official notice

The business associate (BA), American Addiction Centers, Inc., reported that its business associate (BA) experienced a cyber-attack that affected the protected health information (PHI) of 410,747 individuals. The PHI involved included clinical, demographic, and financial information. The BA notified the affected covered entities, individuals, the media, the HHS Secretary, and substitute notice was published on each covered entity’s website. In response to the breach, the BA provided complimentary credit monitoring services to the affected individuals, implemented additional administrative, technical, and security safeguards, and retrained workforce members to better protect PHI.

What is known

People affected422,424 (as reported by the organization)
DisclosedNov 25, 2024
DiscoveredSep 26, 2024
HappenedSep 23, 2024
AttackHacking
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

WhereFiledPeople
HHS archivetotalNov 25, 2024410,747
Vermont AGresidents of VTDec 13, 2024
Washington AGresidents of WADec 20, 20242,994
California AGresidents of CADec 23, 2024
Oregon DOJresidents of ORDec 23, 2024422,424
Indiana AGresidents of INDec 23, 20243,433

Other breaches at American Addiction Centers

BreachAffected
Disclosed Aug 7, 2026Aug 77 weeks agoHackingUnknown
Disclosed Nov 9, 2020Nov 9, 20205 years ago328
History of this record
  • 2026-09-25 · data_types: [] to ["names","health"] · backfill source
  • 2026-09-25 · disclosed: 2024-12-13 to 2024-11-25 · backfill source
  • 2026-09-25 · summary: empty to The business associate (BA), American Addiction Centers, Inc., reported that its business associate (BA) experienced a cyber-attack that affected the protected health information (PHI) of 410,747 individuals. The PHI involved included clini · backfill source
  • 2026-09-25 · records_basis: empty to organization · backfill source
  • 2026-09-25 · records: empty to 422424 · backfill source
  • 2026-09-25 · disclosed: 2024-12-20 to 2024-12-13 · backfill source
  • 2026-09-25 · sector: other to health · backfill source
  • 2026-09-25 · attack: unknown to hacking · backfill source
  • 2026-09-25 · disclosed: 2024-12-23 to 2024-12-20 · backfill source
  • 2026-09-25 · discovered: empty to 2024-09-26 · 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.

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