HHS OCR report ยท 2010
John Muir Physician Network data breach
OCR report facts
- Covered entity
- John Muir Physician Network
- Entity type
- Healthcare Provider
- State
- California
- Individuals affected
- 5,450
- Submission date
- Apr 24, 2010
- Type of breach
- Theft
- Location of breached information
- Laptop
- Business associate present
- No
- Status
- Archive (closed)
OCR description
Two laptop computers containing the electronic protected health information (ePHI) of approximately 5,450 individuals were stolen from the CE. The ePHI included patient names, dates of birth, and social security numbers. The CE provided breach notification to all affected individuals, HHS, and the media. As a result of OCR's investigation, the CE installed encryption software and increased physical security.
Text as published on the HHS OCR breach portal.
Other reports by John Muir Physician Network
| Covered entity | State | Entity type | Individuals | Submitted | Type of breach | Status |
|---|---|---|---|---|---|---|
| John Muir Physician Network | CA | Healthcare Provider | 1,081 | Jun 24, 2021 | Unauthorized Access/Disclosure | Archive (closed) |
Frequently asked questions
How many people were affected by the John Muir Physician Network data breach?
The report to HHS OCR lists 5,450 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Apr 24, 2010.
What type of breach was it?
The OCR portal lists the type of breach as Theft, with the breached information located in: Laptop.
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 John Muir Physician Network 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 John Muir Physician Network.