Premera BlueCross BlueShield
In one of two mega breaches to hit the health-care industry so far this year, health insurance company Premera BlueCross BlueShield said in March that it had discovered a breach in January that affected as many as 11.2 million subscribers, as well as some individuals who do business with the company. The breach compromised subscriber data, which includes names, birth dates, Social Security numbers, bank account information, addresses and other information. According to the Seattle Times, the health insurer had been warned last year that its IT systems were vulnerable to a possible attack.
[Related: The 10 Biggest Data Breaches Of 2015]