Every public data breach

44 disclosed this week · 26,355 on record

Health Net

Disclosed Jul 2, 20138,331 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 exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

Other breaches at Health Net

History of this record
data_types2026-09-25
[] to ["names","health"]by backfillSource
records_basis2026-09-25
empty to hhsby backfillSource
records2026-09-25
empty to 8331by backfillSource
disclosed2026-09-25
2013-08-01 to 2013-07-02by backfillSource
summary2026-09-25
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 by backfillSource
Added2026-09-25
First recordedby backfillSource

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

Everything about Health Net