Another major computer breach involving UnitedHealth Group has prompted two U.S. senators this week to query the health care ...

The cyberattack began on Feb. 21 against Change Healthcare, which is a health care technology company that is part of Optum and owned by UnitedHealth Group, according to the American Hospital ...

Change Healthcare has increased the number of people estimated to be affected by a 2024 cyberattack to nearly 193 million. The UnitedHealth Group claims processing subsidiary revealed the number, a ...

Change Healthcare says it became aware of a cyberattack on Feb. 21, 2024. The company notified people of the data breach on April 22, 2024 after investigations began.