The breach may affect customers dating back to 2004, Anthem said, including its Amerigroup, Anthem and Empire Blue Cross Blue Shield companies as well as Caremore and Unicare.
Anthem is offering current or former members two years of identity theft repair and credit monitoring services through AllClear ID.
The health insurer doesn’t currently sell policies to individuals in Delaware but some may be covered through their employer, according to the Delaware state Insurance Department.
And some customers of Highmark Blue Cross Blue Shield who used the Blue Card, which enables members of one plan to obtain services while in another plan service’s area, may be affected by the data breach, according to the department.
Anthem says the cyber attack was discovered Jan. 29 and may have started in December. It was reported nationally Feb. 13.
Data that may have been breached includes names, dates of birth, Social Security numbers, health care ID numbers, home addresses, email addresses and employment information including income.
“We have no reason to believe credit card or banking information was compromised, nor is there evidence at this time that medical information such as claims, test results, or diagnostic codes, was targeted or obtained,” Anthem says on its website.
The state Insurance Department has set up a consumer alert page for Anthem breach information.
Information also is available from Anthem by phone at 877-263-7995.