The Blue Cross-Blue Shield insurer has said hackers evaded several security layers to reach the database sometime after Dec. 10 and Jan. 27, when a computer system administrator discovered outsiders were using his credentials to log into the system.
The nonprofit Identity Theft Resource Center says that attack was easily the largest it has recorded against a health care company.
People interested in free credit monitoring and identity-theft repair can go to AnthemFacts.com or call (877) 263-7995