The number of individuals affected by the data breach is significantly higher than previously reported.

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UnitedHealth confirmed that the Change Healthcare ransomware attack in February 2024 affected approximately 190 million Americans, nearly twice the initial estimate. The breach led to the theft of extensive health and insurance information, making it the largest medical data breach in U.S. history. UnitedHealth assured that no misuse of the stolen data has been detected so far, and notifications have been sent to the majority of affected individuals. The incident caused significant disruptions in the U.S. healthcare system, and Change Healthcare reportedly paid ransoms to prevent further data exposure.

UnitedHealth confirms 190 million Americans affected by Change Healthcare data breach