HHS OCR report ยท 2016
Kaiser Permanente Health Plan, Inc of Northern California data breach
OCR report facts
- Covered entity
- Kaiser Permanente Health Plan, Inc of Northern California
- Entity type
- Health Plan
- State
- California
- Individuals affected
- 4,432
- Submission date
- Nov 7, 2016
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Network Server
- Business associate present
- No
- Status
- Archive (closed)
OCR description
On October 12, 2016, Kaiser Permanente upgraded its website, kp.org, which resulted in an incorrect configuration setting for caching data. This website upgrade affected several covered entities (CEs), including Kaiser Permanente Health Plan of Northern California. As a result of the error, some users who logged into the website may have had some of the protected health information (PHI) they viewed online saved into the cache where it could be seen by other visitors to the webpage. Kaiser...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Kaiser Permanente Health Plan, Inc of Northern California data breach?
The report to HHS OCR lists 4,432 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Nov 7, 2016.
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 Kaiser Permanente Health Plan, Inc of Northern California 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 Kaiser Permanente Health Plan, Inc of Northern California.