WASHINGTON — The nation’s second-largest health insurer has agreed to pay the government a record $16 million to settle potential privacy violations in the biggest known health care hack in U.S. history.

The personal information of nearly 79 million people — including names, birth dates, Social Security numbers and medical IDs — was exposed in the cyberattack, discovered by the company in 2015.

Anthem said it’s not aware of any fraud or identity theft stemming from the breach.

The settlement between Anthem Inc. and the Department of Health and Human Services represents the largest amount collected by the agency in a health care data breach, officials said.

Indianapolis-based Anthem covers more than 40 million people