Every public data breach

44 disclosed this week · 26,355 on record

North Oklahoma County Mental Health Center

Disclosed Jul 21, 2021128,556 affectedConfirmed

Official notice

The covered entity (CE), North Oklahoma County Mental Health dba NorthCare, reported that it was the subject of a cyber-attack that affected the protected health information (PHI) of 128,556 individuals. The PHI involved included names, dates of birth, addresses, Social Security and drivers’ license numbers, claims information, diagnoses, lab results, medications, and other treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice. In response to the breach, the CE provided complimentary credit monitoring services and implemented additional administrative, technical, and security safeguards, and retrained workforce members to better protect its PHI. OCR provided the CE with technical assistance regarding the requirements under the HIPAA Security Rule.

What is known

People affected128,556 (as reported to HHS)
DisclosedJul 21, 2021
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

History of this record
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.

Everything about North Oklahoma County Mental Health Center