A February cyberattack on a UnitedHealth subsidiary compromised the personal data of some one-third of Americans.

Federal legislators confirm February's data breach at UnitedHealth subsidiary Change Healthcare was the largest in the country's history.

Insurance company UnitedHealth Group is confirming a ransomware attack earlier this year affected the private data of over 100 million people. The number was published in the US Department of Health and Human Services Office of Civil Rights (OCR) Breach Report on Thursday, making it the largest healthcare data breach on the list.

According to a government report, every year an estimated $60 billion is lost to Medicaid fraud, with much of that traced to stolen medical records.

UnitedHealth, the largest U.S. health insurance provider, blamed a Russia-based ransomware gang for the huge data breach of U.S. medical data.

The breach report from Change comes as data breaches in the healthcare industry affect more Americans and expose sensitive health data. During an interview at the HLTH conference earlier this week, OCR Director Melanie Fontes Rainer said about 140 million people were affected by large breaches in 2023, up from 51 million in 2022.

The February hack at UnitedHealth's tech unit Change affected the personal information of 100 million people, the U.S. health department's website showed, making it the largest healthcare data breach in the country.

The scope of the attack makes it the largest healthcare data breach ever, surpassing an Anthem incident in 2015 that affected almost 79 million Americans. According to a testimony

A UnitedHealth hack exposed the personal information and health data of more than 100M Americans – the first time

UnitedHealth CEO Andrew Witty testified in May that the breach may impact a third of the US population, about 112 million citizens.