Premera Blue Cross

Disclosed Jul 18, 20224 years agoConfirmed

Official notice

What is known

People affected	Not stated in the sources we have
Disclosed	Jul 18, 2022
Discovered	Apr 29, 2022
Happened	Apr 27, 2022
Attack	Ransomware
Data exposed	Not stated
Sector	Healthcare · US
Status	Confirmed

Sources

Source	Kind
Washington Attorney General breach notice: Premera Blue Crossatg.wa.gov · Official notice	Official notice

Notices filed

Where	Filed	People
Washington AGresidents of WA	Jul 18, 2022	1,303

Other breaches at Premera Blue Cross

Breach	Disclosed	Attack	Sector	Status	Affected
Disclosed Mar 5, 2023Mar 5, 20233 years agoHacking	Mar 5, 20233 years ago	Hacking	Finance	Confirmed	33K
Cyberattack on Pacific Northwest health insurer exposes 10.4 million peopleMar 17, 201511 years agoPhishing	Mar 17, 201511 years ago	Phishing	Insurance	Settled	11M

History of this record

2026-09-25 · added · backfill source

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

Everything about Premera Blue Cross

New breaches by email

Wednesdays, only in weeks with newly disclosed breaches, the largest first.