Anthem Blue Cross Blue Shield now says 667,866 people in New Hampshire are affected by a recent data hack, or about half the state. That figure includes former Anthem members.
Last month, Anthem revealed hackers tapped into a national database with the personal information of 80 million people.
Anthem is sending letters to everyone with current and past plans advising them how to protect their identities. The company has set up a website AnthemFacts.com to let consumers know how to sign up for two years of free credit monitoring.
Hackers gained access to social security numbers, and home and email addresses.