Every public data breach

44 disclosed this week · 26,355 on record

Highmark

Disclosed Mar 11, 20221,073,316 affectedConfirmed

Official notice

Highmark, the business associate (BA), reported that an employee was the subject of an email phishing scheme that compromised the protected health information (PHI) of 36,600 individuals. The PHI involved included names, addresses, birthdates, Social Security and drivers’ license numbers, diagnoses, medications, claims and financial information, and other treatment information. The BA notified HHS, affected individuals, and the media. In response to the incident, the BA provided complimentary credit monitoring services and implemented additional administrative, technical, and security safeguards. Staff were retrained on email security.

What is known

People affected1,073,316 (as reported by the organization)
DisclosedMar 11, 2022
DiscoveredDec 15, 2022
HappenedDec 13, 2022
AttackPhishing
Data exposedNamesHealthInsurance
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

Other breaches at Highmark

History of this record
disclosed2026-09-25
2022-06-30 to 2022-03-11by backfillSource
disclosed2026-09-25
2022-07-27 to 2022-06-30by backfillSource
summary2026-09-25
empty to Highmark, the business associate (BA), reported that an employee was the subject of an email phishing scheme that compromised the protected health information (PHI) of 36,600 individuals. The PHI involved included names, addresses, birthdatby backfillSource
data_types2026-09-25
["names"] to ["names","health","insurance"]by backfillSource
records_basis2026-09-25
empty to organizationby backfillSource
records2026-09-25
empty to 1073316by backfillSource
disclosed2026-09-25
2023-02-03 to 2022-07-27by backfillSource
data_types2026-09-25
[] to ["names"]by backfillSource
sector2026-09-25
other to healthby backfillSource
attack2026-09-25
unknown to phishingby backfillSource
discovered2026-09-25
empty to 2022-12-15by 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 Highmark