https://www.bleepingcomputer.com/news/security/unitedhealth-says-data-of-100-million-stolen-in-change-healthcare-breach/

UnitedHealth has confirmed for the first time that over 100 million people had their personal information and healthcare data stolen in the Change Healthcare ransomware attack, marking this as the largest healthcare data breach in recent years.

In May, UnitedHealth CEO Andrew Witty warned during a congressional hearing that "maybe a third" of all American's health data was exposed in the attack.