HHS OCR report ยท 2020
Prospect Medical Holdings (Crozer-Keystone Health System) data breach
OCR report facts
- Covered entity
- Prospect Medical Holdings (Crozer-Keystone Health System)
- Entity type
- Healthcare Provider
- State
- Pennsylvania
- Individuals affected
- 177,023
- Submission date
- Aug 14, 2020
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- Status
- Archive (closed)
OCR description
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 ad...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Prospect Medical Holdings (Crozer-Keystone Health System) data breach?
The report to HHS OCR lists 177,023 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Aug 14, 2020.
What type of breach was it?
The OCR portal lists the type of breach as Hacking/IT Incident, with the breached information located in: Network Server.
Is the investigation still open?
No. The report is in the OCR portal archive, which holds reports where OCR has closed its review.
Is a breach notice letter from Prospect Medical Holdings (Crozer-Keystone Health System) legitimate?
This site cannot verify letters. Check the sender against the organisation's official website and the HHS OCR breach portal, and avoid calling numbers or clicking links only listed in an unexpected message. See our guide on what to do after a data breach notice.
Source: HHS OCR Breach Portal, OCR export October 2026. Network USA is not affiliated with HHS or Prospect Medical Holdings (Crozer-Keystone Health System).