In January, the company had estimated the hack at Change Healthcare affected the personal information of 190 million people.

Although last year’s cyberattack at UnitedHealth was bad enough at 100 million when it was initially reported, the U.S.

Ann Arbor-based Michigan Medicine is notifying more than 1,000 people that some of their health information may have been exposed after a research study mailed postcards without envelopes. The ...

The cyberattack on UnitedHealth Group’s technology unit Change Healthcare impacted 192.7 million people, according to information posted on the U.S. Health and Human Services’ website on Thursday.

Michigan Medicine says the health information of some patients was potentially exposed when it mailed out postcards without envelopes.