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County of Los Angeles Departments of Health and Mental Health

Disclosed Dec 16, 20169 years ago749,017 affectedConfirmed

Official notice

The County of Los Angeles, Department of Health and Mental Health (LAC), the covered entity (CE), reported that employee email accounts were breached in a phishing attack that affected the electronic protected health information (ePHI) of 749,017 individuals. Local law enforcement was notified. LAC also notified all affected individuals and the media. The CE hired a third party to conduct a comprehensive HIPAA security audit. In response to the breach, LAC employed additional remediation and mitigation efforts that include cyber features that help identify and block malicious emails, use of an authentication process that will better secure external access to internal emails, and restrictions on the use of personal email accounts. The CE provided all affected individuals with credit monitoring services and identity restoration consultation services.

What is known

People affected749,017 (as reported to HHS)
DisclosedDec 16, 2016
AttackHacking
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

WhereFiledPeople
HHS archivetotalDec 16, 2016749,017
History of this record
  • 2026-09-25 · added · backfill source

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

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