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UW Medicine

Disclosed Jun 4, 20215 years ago18,389 affectedConfirmed

Official notice

UW Medicine, the covered entity (CE), reported that its business associate (BA) experienced a cyber-attack that compromised the protected health information (PHI) of 3,804 individuals. The PHI involved included names, addresses, claims and financial information, medical record numbers, and treatment information. The CE and BA notified HHS, affected individuals, and the media. In its mitigation efforts, the CE provided complimentary credit monitoring services and implemented additional administrative and technical safeguards. OCR provided technical assistance regarding the HIPAA Rules.

What is known

People affected18,389 (as reported to HHS)
DisclosedJun 4, 2021
DiscoveredApr 18, 2022
HappenedApr 16, 2022
AttackLost or stolen device
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Source
Washington Attorney General breach notice: UW Medicineatg.wa.gov · Official notice
HHS OCR breach report (archive, resolved): UW Medicine (Healthcare Provider, WA)ocrportal.hhs.gov · Official notice

Notices filed

WhereFiledPeople
HHS archivetotalJun 4, 202118,389
Washington AGresidents of WAJun 15, 2022739
HHS archivetotalJun 15, 2022763
HHS archivetotalSep 21, 20223,804

Other breaches at UW Medicine

BreachAffected
Disclosed Feb 20, 2019Feb 20, 20197 years agoHacking973K
History of this record
  • 2026-09-25 · records: 3804 to 18389 · backfill source
  • 2026-09-25 · disclosed: 2022-06-15 to 2021-06-04 · 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 3804 · backfill source
  • 2026-09-25 · summary: empty to UW Medicine, the covered entity (CE), reported that its business associate (BA) experienced a cyber-attack that compromised the protected health information (PHI) of 3,804 individuals. The PHI involved included names, addresses, claims and · backfill source
  • 2026-09-25 · added · backfill source

First seen 2026-09-25 (Washington AG), confirmed by Washington AG. Record counts are as reported. Not legal advice.

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