Anthem MaineHealth has disclosed to the Office of the Maine Attorney General a third-party breach that impacted 13,406 residents of Maine. The company learned of the breach on August 5 and provided consumer notification on September 30. An unauthorized party appeared to have taken data from vendor Choice Health in May, accessing personal health information that included name, Social Security number, and health plan carrier, and that may have also included email addresses, dates of birth, and Medicare or Medicaid ID numbers.