At least 15 million people had health and identity information exposed when attackers accessed the network of DentaQuest, the largest Medicaid and Children's Health Insurance Program dental benefits administrator in the country, in what is on track to rank as the biggest health data breach reported to federal regulators this year.
Unauthorized access to portions of the network occurred between May 17 and May 20, and DentaQuest discovered it on May 20, according to notification letters the company filed with the California Attorney General's office and reported by Healthcare IT. DentaQuest, a Massachusetts-based Sun Life subsidiary, administers dental and vision benefits for roughly 33 million members across all 50 states.
