Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

Chickasaw Nation Department of Health

Disclosed Jun 11, 20261,607 affectedConfirmed

Official notice

What is known

People affected1,607 (as reported to HHS)
DisclosedJun 11, 2026
AttackInsider
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Official noticeocrportal.hhs.gov
HHS OCR breach report: Chickasaw Nation Department of Health (Healthcare Provider, OK)

Notices filed

TotalJun 11
HHS OCR1,607 people
History of this record
Added2026-09-25
First recordedby backfillSource

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

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