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44 disclosed this week · 26,355 on record

California Cancer Associates for Research and Excellence - San Diego

Disclosed Jun 27, 2025638 affectedConfirmed

Official notice

The covered entity (CE), California Cancer Associates for Research and Excellence – San Diego reported that multiple employees of its business associate (BA) were the subjects of an email phishing incident that affected the protected health information (PHI) of 638 individuals. The PHI involved included clinical, demographic, and financial information. The CE notified HHS, the affected individuals, the media, and provided substitute notice. In response to the breach, the CE provided complimentary credit monitoring services to the affected individuals and the BA and CE implemented additional administrative, technical, and security safeguards, and retrained workforce members to better protect PHI.

What is known

People affected638 (as reported to HHS)
DisclosedJun 27, 2025
HappenedDec 13, 2024
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

History of this record
attack2026-09-25
unknown to hackingby backfillSource
data_types2026-09-25
[] to ["names","health"]by backfillSource
records_basis2026-09-25
empty to hhsby backfillSource
records2026-09-25
empty to 638by backfillSource
disclosed2026-09-25
2025-07-15 to 2025-06-27by backfillSource
summary2026-09-25
empty to The covered entity (CE), California Cancer Associates for Research and Excellence – San Diego reported that multiple employees of its business associate (BA) were the subjects of an email phishing incident that affected the protected healthby 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.

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