HHS OCR report ยท 2025
Mendocino Community Health Clinic Inc. data breach
OCR report facts
- Covered entity
- Mendocino Community Health Clinic Inc.
- Entity type
- Healthcare Provider
- State
- California
- Individuals affected
- 3,538
- Submission date
- Dec 29, 2025
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- Yes
- Status
- Archive (closed)
OCR description
The covered entity (CE), Mendocino Community Health Clinic Inc., reported that a subcontractor of its business associate (BA) a cyberattack that compromised the protected health information (PHI) of 3,538 individuals. The PHI involved included financial and demographic information. The CE notified HHS, the affected individuals, and the media. In response to the breach, the CE provided complimentary credit monitoring services to the affected individuals and the CE and BA and implemented addit...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Mendocino Community Health Clinic Inc. data breach?
The report to HHS OCR lists 3,538 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Dec 29, 2025.
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 Mendocino Community Health Clinic 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 Mendocino Community Health Clinic Inc..