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Premera Blue Cross

Disclosed Mar 17, 201511 years ago11,000,000 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 exposedNames, Dates of birth, Social Security numbers, Financial, Health, Insurance, Addresses
SectorInsurance · US
StatusSettled
Lawsuit or fine$6.85M HHS OCR HIPAA settlement (2020) (about $6.8M)

Sources

Notices filed

WhereFiledPeople
ResearchtotalMar 17, 201510,400,000
HHS archivetotalMar 17, 201511,000,000

Other breaches at Premera Blue Cross

BreachAffected
Disclosed Mar 5, 2023Mar 5, 20233 years agoHacking33K
Disclosed Jul 18, 2022Jul 18, 20224 years agoRansomwareUnknown
History of this record
  • 2026-09-25 · records_basis: organization to hhs · backfill source
  • 2026-09-25 · records: 10400000 to 11000000 · backfill source
  • 2026-09-25 · added · seed source

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

Everything about Premera Blue Cross

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