HHS OCR report · 2019
Maffi Clinics data breach
OCR report facts
- Covered entity
- Maffi Clinics
- Entity type
- Healthcare Provider
- State
- Arizona
- Individuals affected
- 10,465
- Submission date
- Mar 6, 2019
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- Status
- Archive (closed)
OCR description
On March 6, 2019, Maffi Clinics (“Maffi”) submitted a breach notification report to OCR indicating that on September 11, 2018, it was the victim of a ransomware attack. Maffi promptly identified and terminated the unauthorized access point, isolated and removed the ransomware, and restored all of Maffi’s data. The incident affected 10,465 patients’ clinical and demographic information, although Maffi found no evidence that any of its data was viewed or downloaded. On February 14, 2019, Maf...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Maffi Clinics data breach?
The report to HHS OCR lists 10,465 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Mar 6, 2019.
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 Maffi Clinics 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 Maffi Clinics.