Data recently posted on a federal website shows the cyberattack earlier this year at a UnitedHealth Group subsidiary affected 100 million patients — apparently a U.S. record. The tally roughly matches the scope previously described by company Chief Executive Andrew Witty,

Healthcare data and personal information of more than 100 million people was stolen in the ransomware attack on Change Healthcare in February, UnitedHealth has confirmed for the first time.

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 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 February ransomware attack on Change Healthcare coughed up Social Security numbers as well as billing and health information.

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