HHS OCR report ยท 2021
Health Center Partners of Southern California data breach
OCR report facts
- Covered entity
- Health Center Partners of Southern California
- Entity type
- Business Associate
- State
- California
- Individuals affected
- 337,245
- Submission date
- Apr 9, 2021
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- Yes
- Status
- Archive (closed)
OCR description
The business associate (BA), Health Center Partners of Southern California, reported that its vendor experienced a ransomware attack that affected the electronic protected health information (ePHI) of 337,245 individuals. The ePHI involved included names, diagnoses, Social Security numbers, medications prescribed, financial and health insurance information, and other treatment information. The BA notified HHS, affected individuals, the media, and provided substitute notice. In response to...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Health Center Partners of Southern California data breach?
The report to HHS OCR lists 337,245 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Apr 9, 2021.
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 Health Center Partners of Southern California 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 Health Center Partners of Southern California.