Skip to content

Western Washington Medical Group

Disclosed Oct 26, 20232 years ago350,863 affectedConfirmed

Official notice

The covered entity (CE), Western Washington Medical Group, reported that it was the subject of a ransomware attack that affected the protected health information (PHI) of 350,863 individuals. The PHI involved included names, addresses, Social Security numbers, dates of birth, claims information, and diagnoses. The CE notified HHS, the affected individuals, the media, and provided substitute notice. In response to the breach, the CE provided complimentary credit monitoring services and implemented additional administrative, technical, and security safeguards. Staff were retrained on the requirement to protect and secure PHI.

What is known

People affected350,863 (as reported to HHS)
DisclosedOct 26, 2023
DiscoveredSep 25, 2023
HappenedJul 7, 2023
AttackRansomware
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

WhereFiledPeople
HHS archivetotalOct 26, 2023350,863
California AGresidents of CANov 8, 2023
Washington AGresidents of WANov 8, 2023334,360

Other breaches at Western Washington Medical Group

BreachAffected
Disclosed Jan 12, 2018Jan 12, 20188 years agoLost or stolen device842
History of this record
  • 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 350863 · backfill source
  • 2026-09-25 · disclosed: 2023-11-08 to 2023-10-26 · backfill source
  • 2026-09-25 · summary: empty to The covered entity (CE), Western Washington Medical Group, reported that it was the subject of a ransomware attack that affected the protected health information (PHI) of 350,863 individuals. The PHI involved included names, addresses, Soci · backfill source
  • 2026-09-25 · attack: unknown to ransomware · backfill source
  • 2026-09-25 · discovered: empty to 2023-09-25 · 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 Western Washington Medical Group

New breaches by email

Wednesdays, only in weeks with newly disclosed breaches, the largest first.

Double opt-in. Unsubscribe any time.