The Brazilian, who rejoined the Rossoneri last summer from Real Madrid, is in line to make his 300th appearance for the club against Chievo on Saturday.
While he insists he does not regret his return to Milan despite the difficult season to date, Kaka has hinted he could consider leaving in the summer - and he would like to move to North America should he quit the club.
"I have no regrets at my decision to come back to Milan," he told Corriere della Sera. "It is part of life to experience strange moments and every team has had a crisis at one stage, so this is Milan's moment. I don't think [Clarence] Seedorf expected to find such a difficult situation, but Clarence is still only at the start [of his coaching career].
"In future I'd like to play in America. At the end of the season I'll talk to Adriano Galliani to understand his ideas and those of the club. If I were to leave, then I would like a transfer to the United States."