Peres is expected to remain at the Sheba Medical Centre near Tel Aviv for another day after being taken there yesterday.
Due to a "mild" case of irregular heartbeat, "his doctors recommended that he remain in the hospital to allow him to continue to be monitored and for his medication to be adjusted accordingly," his office said in a statement.
"President Peres now feels well and the tests conducted have not revealed any irregularities."
He was released on January 19 but forced to cancel a planned trip the following day to the World Economic Forum in Davos, where he had scheduled 15 meetings with world leaders and international officials.
A co-architect of the 1993 Oslo peace accords, Peres won the 1994 Nobel Peace Prize jointly with then Israeli prime minister Yitzhak Rabin, who was assassinated the following year, and the late Palestinian leader Yasser Arafat.
The last of Israel's founding fathers, Peres has held nearly every major office in the country, including prime minister twice and president from 2007 to 2014.