(Bloomberg) -- Social Security numbers, names and addresses formillions of people who aren’t customers of Anthem Inc. may havebeen breached in a massivecyberattack disclosed by the health insurer earlierthis month.

Anthem, which runs Blue Cross and Blue Shield plans in 14states, believes information on 78.8 million people was accessed byhackers. Of those, about 60 million to 70 million were customers ofthe Indianapolis, Indiana-based insurer, spokeswoman Kristin Binnssaid in an e-mailed statement Tuesday.

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The remainder includes millions of people who aren’t Anthemmembers, but used their Blue Cross or Blue Shield insurance instates, including Texas and Florida, where Anthem operatespartnerships. Binns said it was too soon to put an exact number onhow many non-members were affected.

Anthem said Feb. 4 that personal information of its customersand employees had been breached by hackers. The company stilldoesn’t believe that any financial or confidential healthinformation was accessed.

Anthem, formerly known as WellPoint, said it would provide freecredit monitoring and identity protection services to customerswhose data was compromised.

The Anthem breach is the biggest in the health-care industrysince Chinese hackers stole Social Security numbers, names andaddress from 4.5 million patients of Community Health Systems Inc.,the second-biggest for-profit hospital chain, last year. The attackis on a similar scale to hacks of customer data from Target Corp.and Home Depot Inc. last year, in terms of the number of peopleaffected.

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