Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

MultiCare Health System

Disclosed Jul 25, 202223,712 affectedConfirmed

Official notice

What is known

People affected23,712 (as reported by the organization)
DisclosedJul 25, 2022
DiscoveredJun 2, 2022
HappenedMay 18, 2022
AttackRansomware
Data exposedNot stated
SectorHealthcare · US
StatusConfirmed

Sources

Official noticeatg.wa.gov
Washington Attorney General breach notice: MultiCare Health System
Official noticein.gov
Indiana Attorney General 2022 data breach report: MultiCare Health System

Notices filed

Residents of WAJul 25, 2022
Washington AG22,679 people
Residents of INOct 25, 2022
Indiana AG4 people

Other breaches at MultiCare Health System

Ransomware breachRansomware exposed names and health records. Reported to the HHS archive.179K affectedHealthcareUSAug 21, 2020Hacking breachHacking exposed names and health records. Reported to the HHS archive.1,249 affectedHealthcareUSJan 26, 2017
History of this record
records_basis2026-09-25
empty to organizationby backfillSource
records2026-09-25
empty to 23712by backfillSource
Added2026-09-25
First recordedby backfillSource

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

Everything about MultiCare Health System