Health Care Sector Cyberattacks Broke Records in 2024
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Apr 11, 2025
In 2024, the health care sector reported 14 data breaches that involved more than 1 million patient records, representing almost 70% of the U.S. population, according to an AIS Health analysis of data from the HHS Office for Civil Rights (OCR).
In total, there were 734 health care data breaches that were large enough to report to OCR in 2024, a slight decrease compared to 747 breaches in 2023. However, 2024 was the worst-ever year in terms of the number of patients affected, as a data breach targeting UnitedHealth Group subsidiary Change Healthcare affected an estimated 190 million individuals.
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