U.S. Markets closed

Quest Diagnostics: 12 million patients may have had personal information breached

Anthony Noto
Quest Diagnostics: 12 million patients may have had personal information breached

Quest Diagnostics Inc., one of the biggest blood testing providers in the country, has suffered a massive hack possibly affecting millions of its customers. The company confirmed Monday that nearly 12 million people may have had personal, financial and medical information breached due to an issue with one of its vendors. In a filing with the U.S. Securities and Exchange Commission, Quest explained that someone had unauthorized access to the systems of American Medical Collections Agency (AMCA), a billing services vendor.