Every public data breach

44 disclosed this week · 26,355 on record

California Physicians' Service

Disclosed Apr 13, 201818,416 affectedConfirmed

Official notice

The covered entity (CE), Blue Shield of California, reported that its business associate (BA) Sharecare Health Data Services, LLC, was the victim of a cyber-attack affecting the protected health information (PHI) of 18,416 individuals. The PHI involved included names, dates of birth, Social Security numbers, and clinical information. The CE notified HHS, affected individuals, the media, and posted substitute notice on its website. Affected individuals were also provided complimentary credit monitoring services.

What is known

People affected18,416 (as reported to HHS)
DisclosedApr 13, 2018
HappenedMay 22, 2018
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

Other breaches at California Physicians' Service

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 18416by backfillSource
summary2026-09-25
empty to The covered entity (CE), Blue Shield of California, reported that its business associate (BA) Sharecare Health Data Services, LLC, was the victim of a cyber-attack affecting the protected health information (PHI) of 18,416 individuals. The by backfillSource
disclosed2026-09-25
2019-02-15 to 2018-04-13by 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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