(Reuters) - Health insurer Anthem Inc warned customers about an email scam targeting former and current members whose personal information was suspected to have been breached.
The No. 2 U.S. health insurer said on Wednesday that hackers breached its IT system containing data on up to 80 million people.
Anthem said on Friday it was not calling members regarding the cyber attack and not asking for credit card information or social security numbers over the phone.
The company said it will contact its current and former members via mail delivered by the U.S. Postal Service about the cyber attack.
Several U.S. states are investigating the cyberattack on Anthem that a person familiar with the matter said is being examined for possible ties to China.
Cybersecurity has become a major concern for U.S. firms, with some of the biggest data breaches reported to date include those at retailers Target Corp and Home Depot Inc.
Anthem's shares were down about 1 pct at $135.93 on the New York Stock Exchange in afternoon trading
(Reporting by Anjali Rao Koppala in Bengaluru; Editing by Don Sebastian)