PYMNTS.com January 26, 2025

The biggest medical-related data breach in U.S. history was even larger than first estimated.

The ransomware attack on UnitedHealth’s Change Healthcare business last year impacted around 190 million people, almost double past estimates, TechCrunch reported Friday (Jan. 24).

“Change Healthcare has determined the estimated total number of individuals impacted by the Change Healthcare cyberattack is approximately 190 million,” Tyler Mason, a spokesperson for UnitedHealth, wrote in an email to the publication.

“The vast majority of those people have already been provided individual or substitute notice. The final number will be confirmed and filed with the Office for Civil Rights at a later date.”

The statement added that the company was “not aware of any misuse of individuals’ information as...

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