HHS OCR report ยท 2021
Community Medical Centers, Inc. data breach
OCR report facts
- Covered entity
- Community Medical Centers, Inc.
- Entity type
- Healthcare Provider
- State
- California
- Individuals affected
- 604,583
- Submission date
- Oct 26, 2021
- 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), Community Medical Centers, reported that it was the victim of a ransomware attack that compromised the protected health information (PHI) of approximately 604,583 individuals. The PHI involved included names, Social Security numbers, addresses, dates of birth, and clinical information. The CE notified HHS, affected individuals, the media, and provided substitute notice. In response to the breach, the CE retrained its workforce members and implemented additional admini...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Community Medical Centers, Inc. data breach?
The report to HHS OCR lists 604,583 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Oct 26, 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 Community Medical Centers, Inc. 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 Community Medical Centers, Inc..