Nearly all of the 20 state-run health insurance exchanges in the US have added advertising trackers that transmit user activity back to big tech companies, in some cases sending more data than state officials realized. Bloomberg News reviewed thousands of enrollment and informational webpages across these sites, as well as the Washington, DC exchange, and found personal data being shared on many of them. More than 7 million Americans bought health insurance for 2026 through these sites.
The Washington exchange sent applicants’ sex and citizenship responses to TikTok, as well as some race data that the tracker failed to filter ...