According to a spokeswoman for Citigroup, the bank will replace all customer debit cards involved in the data breach at Target.
The replacement has not taken place before now because the bank wanted to minimise disruptions during the Christmas shopping season, according to an anonymous source quoted in the US media.
Citi spokeswoman Elizabeth Fogarty said in a statement: "This is being done as a precautionary measure."
Fogarty declined to provide details on the number of cards being replaced.
According to an investigation in early January, hackers stole the personal data of at least 70m customers, including names, e-mail addresses, phone numbers and mailing addresses.
The retailer had previously said the hackers stole data from 40m customers’ credit and debit cards.
JPMorgan declared in December that it will reissue new debit cards quickly at many of its branches.
According to reports in the US media, Citi is not reissuing credit cards, only debit cards.