Quest Diagnostics Incorporated, a Fortune 500 diagnostic services provider, says that approximately 12 million of its clients may have been impacted by a data breach. The company reported to the U.S. Securities and Exchange Commission (SEC) that it received a notification from its billing collection provider American Medical Collection Agency (AMCA) that their web payment page was breached. The information that could be accessed during the security breach includes financial information such as bank account data and credit card numbers, as well as medical and personal information like Social Security Numbers.
Source: https://www.bleepingcomputer.com/news/security/billing-details-for-119m-quest-diagnostics-clients-exposed/