At the end of January, this year, Premera Blue Cross discovered they were breached. Possibly 11 million records of Personal/Medical and Financial information was exposed. After working with Mandiant and the FBI, the indicators of compromise date as far back as May 5th, 2014.
Premera will use normal post and will not email or call customers about the breach, to protect against phishing attacks. Premera members should avoid opening attachments and links or replying to emails about the breach.