Blue Shield of California data breach leaked millions of users’ health data to Google
- Blue Shield of California notified 4.7 million people about protected health information shared with Google from April 2021 to January 2024.
- A misconfiguration allowed Google Analytics to share member data with Google Ads.
- Shared data included patient names, insurance plan details, and provider search terms.
- Blue Shield stated, "no bad actor was involved," in the incident.
- This ranks as the largest healthcare data breach reported in 2025.
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Blue Shield of California data breach leaked millions of users’ health data to Google
(KRON) -- A blockbuster potential data breach may have led to millions of Blue Shield of California members having their private health information shared with Google and used to target them with ads. That's according to a notice the Oakland-based health insurance provider posted earlier this month. According to the notice, Blue Shield discovered on Feb. 11 of this year that between April 2021 and January 2024, the insurance provider configured …
·San Francisco, United States
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