100M hit by Change Healthcare breach

October 23, 2024

Lauren Berryman   

It’s official: The massive cyberattack against UnitedHealth Group unit Change Healthcare was the biggest healthcare data breach in history.

The ransomware incident in February affected 100 million people, or nearly 30% of the U.S. population, according to the Breach Portal maintained by the Office for Civil Rights at the Health and Human Services Department. That’s consistent with what CEO Andrew Witty told a House subcommittee in May, when he testified that the breach ensnared about one-third of the country.

That makes the Change Healthcare cyberattack the largest ever recorded, surpassing a 2015 breach at Anthem (now named Elevance Health) that hit 78.8 million people, according to the Office for Civil Rights, which enforces privacy regulations.

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