Kaiser Foundation Health Plan data breach

Clerk's notes

Kaiser Foundation Health Plan, operating in California, has confirmed an Unauthorized Disclosure incident impacting an estimated 13,400,000 individuals. This event was officially reported to the California Attorney General on March 12, 2026.

The disclosure originated from online tracking technologies used by Kaiser Foundation Health Plan. These technologies were found to transmit specific member information to various third-party vendors, enabling data sharing that was not properly authorized.

Data categories reportedly exposed in this incident include member names, IP addresses, and health-related web activity. The official filing does not indicate any other types of personal data were compromised.

Individuals who have received a direct notification letter from Kaiser Foundation Health Plan regarding this disclosure are advised to carefully review its contents. The letter should provide specific details concerning their information and any recommended actions.

Currently, the California Attorney General's office is monitoring this matter. This involves an ongoing review of the reported incident and any subsequent steps taken by Kaiser Foundation Health Plan to address the disclosure.

Understanding the exact nature of the data involved and the conditions under which it was disclosed is important for affected members to consider.

If you have received a notification about this Kaiser Foundation Health Plan data disclosure, you may be entitled to a free case review to explore your legal options.

If a notification letter about this breach reached you, see every CA data breach on file or browse all cases.