Every public data breach

47 disclosed this week · 26,367 on record

Kootenai Health

Disclosed Apr 24, 2024464,088 affectedConfirmed

Official notice

The covered entity (CE), Kootenai Health reported that an unauthorized individual gained access to its system and compromised the protected health information (PHI) of 464,088 individuals. The type of PHI involved included clinical, demographic, and financial information. 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 to the affected individuals, implemented additional administrative, technical, and security safeguards, and retrained workforce members to better protect its PHI.

What is known

People affected464,088 (as reported by the organization)
DisclosedApr 24, 2024
DiscoveredMar 2, 2024
HappenedFeb 22, 2024
AttackRansomware
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

History of this record
data_types2026-09-25
[] to ["names","health"]by backfillSource
disclosed2026-09-25
2024-08-12 to 2024-04-24by backfillSource
summary2026-09-25
empty to The covered entity (CE), Kootenai Health reported that an unauthorized individual gained access to its system and compromised the protected health information (PHI) of 464,088 individuals. The type of PHI involved included clinical, demograby backfillSource
records_basis2026-09-25
empty to organizationby backfillSource
records2026-09-25
empty to 464088by backfillSource
attack2026-09-25
unknown to ransomwareby backfillSource
discovered2026-09-25
empty to 2024-03-02by backfillSource
Added2026-09-25
First recordedby backfillSource

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

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