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Health Net

Disclosed Jul 2, 201313 years ago8,331 affectedConfirmed

Official notice

The covered entity, Health Net, Inc. (HN), erroneously mailed identification cards for 8,331 members to their former addresses due to a system error by its contractor, Cognizant Technology Services. HN also acts as a business associate for some other covered entities. The types of protected health information (PHI) included demographic information, such as members’ names. HN provided breach notification to HHS, affected individuals, and the media. Following the breach, HN uncovered and corrected the programming error and developed and implemented a new program to help ensure that the syncing of beneficiary addresses between specific enrollment files and HN’s master address file is accurate. OCR provided technical assistance regarding security risk analysis and determined that HN must conduct an enterprise-wide security risk analysis..

What is known

People affected8,331 (as reported to HHS)
DisclosedJul 2, 2013
HappenedApr 1, 2013
AttackNot stated
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Source
California Attorney General breach notice: Health Netoag.ca.gov · Official notice
HHS OCR breach report (archive, resolved): Health Net (Health Plan, CA)ocrportal.hhs.gov · Official notice

Notices filed

WhereFiledPeople
HHS archivetotalJul 2, 20138,331
California AGresidents of CAAug 1, 2013

Other breaches at Health Net

BreachAffected
Disclosed Dec 22, 2021Dec 22, 20214 years agoUnknown
Disclosed May 13, 2019May 13, 20197 years agoInsider2,404
Server drives missing from IBM-managed data center hold data of 1.9 millionApr 14, 201115 years agoLost or stolen device1.9M
Missing portable drive held records of 1.5 million Health Net membersNov 18, 200916 years agoLost or stolen deviceUnverified1.5M
History of this record
  • 2026-09-25 · data_types: [] to ["names","health"] · backfill source
  • 2026-09-25 · records_basis: empty to hhs · backfill source
  • 2026-09-25 · records: empty to 8331 · backfill source
  • 2026-09-25 · disclosed: 2013-08-01 to 2013-07-02 · backfill source
  • 2026-09-25 · summary: empty to The covered entity, Health Net, Inc. (HN), erroneously mailed identification cards for 8,331 members to their former addresses due to a system error by its contractor, Cognizant Technology Services. HN also acts as a business associate for · backfill source
  • 2026-09-25 · added · backfill source

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

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