UAE's official news agency reported that a diplomat had confirmed Keita will receive medical treatment in the Gulf state, after he was overthrown last month in a military coup.
Mohammed Al-Shamsi, director of the African department at the UAE ministry of foreign affairs, said the decision comes at the request of Mali's military junta and the president of neighbouring Niger.
"The UAE believes in the importance of restoring stability in Mali through a rapid and constructive political process that ensures the best outcome for the brotherly people of Mali and the Sahel Region," Al-Shamsi said, according to WAM.
Keita was deposed in a military coup on 18 August, with the former president detained and then admitted to hospital.
His former chief-of-staff, Mamadou Camara, told Reuters that he was flown out to the UAE on Saturday following a request from Mali's new military rulers.
"It is a medical visit of between 10 and 15 days," he told the news agency.