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Prospect Medical Holdings

Disclosed Aug 14, 20206 years ago177,023 affectedConfirmed

Official notice

The covered entity (CE), Crozer-Keystone Health System, reported that it was a victim of a ransomware attack that affected the electronic protected health information (ePHI) of 177,023 individuals. The ePHI involved included names, dates of birth, Social Security numbers, lab results, health insurance information, and other treatment information. The CE notified HHS, affected individuals, the media, and posted substitute notice on its website. In response to the breach, the CE implemented additional technical safeguards to better protected its ePHI.

What is known

People affected177,023 (as reported to HHS)
DisclosedAug 14, 2020
AttackHacking
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

WhereFiledPeople
HHS archivetotalAug 14, 2020177,023

Other breaches at Prospect Medical Holdings

BreachAffected
Disclosed Sep 29, 2023Sep 29, 20232 years agoHacking1.3M
History of this record
  • 2026-09-25 · added · backfill source

First seen 2026-09-25 (HHS archive), confirmed by HHS OCR. Record counts are as reported. Not legal advice.

Everything about Prospect Medical Holdings

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