All Breaches
December 1, 2025 Verified Sensitive Record Healthcare

Chickasaw Nation Health 2025 Data Breach

The 2025 Chickasaw Nation Health data breach involved an employee accessing emergency-department patient records at Chickasaw Nation Medical Center in Ada, Oklahoma without authorization.

1.6 Thousand
Affected People
3
Data Types
Low
Severity
Yes
Verification

Exposed Data Types

3
Names
Ages
Medical information

Additional Information

Added DateJuly 29, 2026
Breach DateDecember 1, 2025
Domainchickasawnationhealth.net
SourceData breach
Last Content UpdateJuly 29, 2026

Verification and editorial method

LeakData compares the incident name, date, affected-record count, and exposed data types with accessible sources. Unverified fields are not presented as facts, and records are updated when new evidence becomes available.

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Company Information

Company NameChickasaw Nation Department of Health
SectorHealthcare
CountryUnited States
Websitechickasawnationhealth.net

Risk Level

Low

This breach carries a low level of risk.

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