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44 disclosed this week · 26,355 on record

Premera Blue Cross

Disclosed Mar 17, 201511,000,000 affectedSettled

Official notice

Cyberattack on Pacific Northwest health insurer exposes 10.4 million people

Premera reported on March 17, 2015 that cyber attackers had gained unauthorized access to its IT systems; HHS OCR said the breach affected more than 10.4 million people and Premera paid $6.85 million to settle HIPAA violations.

What is known

People affected11,000,000 (as reported to HHS)
DisclosedMar 17, 2015
AttackPhishing
Data exposedNamesDates of birthSocial Security numbersFinancialHealthInsuranceAddresses
SectorInsurance · US
StatusSettled
Lawsuit or fine$6.85M HHS OCR HIPAA settlement (2020) (about $6.8M)

Sources

Notices filed

Other breaches at Premera Blue Cross

History of this record
records_basis2026-09-25
organization to hhsby backfillSource
records2026-09-25
10400000 to 11000000by backfillSource
Added2026-09-25
First recordedby seedSource

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

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