Every public data breach

44 disclosed this week · 26,355 on record

Oklahoma Department of Human Services

Disclosed Dec 5, 201747,000 affectedConfirmed

Official notice

The covered entity (CE), Oklahoma Department of Human Services, reported that it inadvertently issued client notice letters with a second, unrelated client’s name and address due to a software change, affecting 813 individuals. The CE provided breach notification to HHS, affected individuals, and the media. Following the breach, the CE developed and deployed a solution that stopped incorrect information from being added to the notice letters provided to clients. OCR obtained assurances that the CE implemented the corrective action steps noted above.

What is known

People affected47,000 (as reported to HHS)
DisclosedDec 5, 2017
AttackHacking
Data exposedNamesHealth
SectorInsurance · US
StatusConfirmed

Sources

Notices filed

History of this record
records2026-09-25
813 to 47000by backfillSource
disclosed2026-09-25
2018-10-08 to 2017-12-05by backfillSource
Added2026-09-25
First recordedby backfillSource

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

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