HHS OCR report · 2018
Muir Medical Group, IPA, Inc. data breach
OCR report facts
- Covered entity
- Muir Medical Group, IPA, Inc.
- Entity type
- Business Associate
- State
- California
- Individuals affected
- 5,485
- Submission date
- May 22, 2018
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Network Server
- Business associate present
- Yes
- Status
- Archive (closed)
OCR description
On March 7, 2018, an employee of Muir Medical Group, IPA, Inc., a business associate (BA) subcontractor, impermissibly accessed and copied its clients’ electronic data, including the protected health information (PHI) of 5,485 individuals. The types of PHI affected by the breach included demographic, insurance, and clinical information. The BA provided breach notification to HHS, affected patients, and the media, and offered identity theft protection services to all affected individuals. I...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Muir Medical Group, IPA, Inc. data breach?
The report to HHS OCR lists 5,485 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on May 22, 2018.
What type of breach was it?
The OCR portal lists the type of breach as Unauthorized Access/Disclosure, 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 Muir Medical Group, IPA, 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 Muir Medical Group, IPA, Inc..