Quest Diagnostics Says Data Beach Could Have Hit 11.9 Million Patients

Quest Diagnostics Inc said on Monday it was notified by a billing collections vendor that an unauthorized user gained access to information on nearly 11.9 million patients, including credit card numbers and bank account information.

The company has not received all the information about the incident from American Medical Collection Agency (AMCA) and has not been able to verify the accuracy of the information received from AMCA, the diagnostic information services provider said.