HHS OCR report ยท 2011
Health Plan of San Mateo data breach
OCR report facts
- Covered entity
- Health Plan of San Mateo
- Entity type
- Health Plan
- State
- California
- Individuals affected
- 694
- Submission date
- Jun 29, 2011
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Paper/Films
- Business associate present
- No
- Status
- Archive (closed)
OCR description
\N
Text as published on the HHS OCR breach portal.
Other reports by Health Plan of San Mateo
| Covered entity | State | Entity type | Individuals | Submitted | Type of breach | Status |
|---|---|---|---|---|---|---|
| Health Plan of San Mateo | CA | Health Plan | 11,894 | Mar 17, 2023 | Hacking/IT Incident | Archive (closed) |
| Health Plan of San Mateo | CA | Health Plan | 4,032 | Jan 18, 2023 | Hacking/IT Incident | Archive (closed) |
Frequently asked questions
How many people were affected by the Health Plan of San Mateo data breach?
The report to HHS OCR lists 694 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Jun 29, 2011.
What type of breach was it?
The OCR portal lists the type of breach as Unauthorized Access/Disclosure, with the breached information located in: Paper/Films.
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 Health Plan of San Mateo 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 Health Plan of San Mateo.