Breach at health insurance giant Blue Shield of California leaked health data of millions to Google - see if you are affected

• A breach has affected nearly 5 million Blue Shield of California healthcare customers
• This was thanks to a misconfiguration of Google Analytics
• Sensitive health information and patient data was exposed

Health insurance firm Blue Shield has revealed a data breach has exposed protected health data of over 4.7 million members.

The information was leaked to Google’s analytics and advertisement platforms following a misconfiguration of Google analytics on Blue Shield sites.

“On February 11, 2025, Blue Shield discovered that, between April 2021 and January 2024, Google Analytics was configured in a way that allowed certain member data to be shared with Google’s advertising product, Google Ads, that likely included protected health information,” the company wrote.

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