Health Plan of San Mateo

Disclosed Jun 29, 201115 years ago694 affectedConfirmed

What is known

Source	Kind
HHS OCR breach report (archive, resolved): Health Plan of San Mateo (Health Plan, CA)ocrportal.hhs.gov · Official notice	Official notice

Where	Filed	People
HHS archivetotal	Jun 29, 2011	694

Breach	Disclosed	Attack	Sector	Status	Affected
Disclosed Jan 18, 2023Jan 18, 20233 years agoHacking	Jan 18, 20233 years ago	Hacking	Healthcare	Confirmed	12K

History of this record

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