Every public data breach

47 disclosed this week · 26,367 on record

Pacific Alliance Medical Center

Disclosed Aug 10, 2017266,123 affectedConfirmed

Official notice

The covered entity (CE) was the victim of a malware/ransom attack affecting the protected health information (PHI) of 266,123 patients. The PHI involved in the breach included names, dates of birth, addresses, social security numbers, driver’s license information, claims information, and treatment information such as diagnoses, medications, lab results, and medical images. The CE provided breach notification to HHS, affected individuals, and the media. Following the breach, the CE strengthened its administrative and technical safeguards. OCR’s investigation resulted in the CE enhancing its practices in safeguarding PHI.

What is known

People affected266,123 (as reported to HHS)
DisclosedAug 10, 2017
HappenedJun 14, 2017
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 266123by backfillSource
disclosed2026-09-25
2017-08-11 to 2017-08-10by backfillSource
summary2026-09-25
empty to The covered entity (CE) was the victim of a malware/ransom attack affecting the protected health information (PHI) of 266,123 patients. The PHI involved in the breach included names, dates of birth, addresses, social security numbers, driveby 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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