Blue Shield of California shared the private health data of millions with Google for years

Blue Shield of California recently alerted its millions of customers about a major data breach, revealing that sensitive health information had been shared with Google since 2021. The insurer admitted Google may have used this data for targeted advertising, including search terms, insurance plans, demographics, and financial details. Thousands of affected individuals are now aware of the breach, which is among the largest healthcare-related breaches reported in 2025 so far.