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53 disclosed this week · 26,385 on record

California Physicians' Services

Disclosed Nov 6, 20202,841 affectedConfirmed

Official notice

California Physicians’ Services dba Blue Shield of California, a covered entity (CE), reported that its business associate (BA) experienced a ransomware attack that compromised the electronic protected health information (ePHI) of 2,841 individuals. The ePHI involved included names, addresses, dates of birth, and health insurance information. The BA notified law enforcement; the CE notified HHS, affected individuals, the media, and provided substitute notice.

What is known

People affected2,841 (as reported to HHS)
DisclosedNov 6, 2020
HappenedJan 20, 2021
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

Other breaches at California Physicians' Services

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 2841by backfillSource
summary2026-09-25
empty to California Physicians’ Services dba Blue Shield of California, a covered entity (CE), reported that its business associate (BA) experienced a ransomware attack that compromised the electronic protected health information (ePHI) of 2,841 indby backfillSource
disclosed2026-09-25
2021-12-13 to 2020-11-06by 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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