Chinese hackers stole social security numbers, names and addresses from 4.5 million patients of Community Health Systems Inc. (CYH), the second-biggest for-profit U.S. hospital chain, according to the company.
The attacks occurred in April and June, the Franklin, Tennessee-based company said yesterday in a U.S. regulatory filing. The hacker group originated from China and bypassed the companys security system, making off with non-medical information from people who visited doctors offices associated with the company.