The Brazilian attacking midfielder has been repeatedly linked to new MLS franchise Orlando City, but insists that his future is still in doubt as he prepares to return to pre-season training with Milan.
"I am not out of Milan," Kaka, who re-joined Milan last September, told members of the media.
"Every year, at this time, there is great speculation about my future. The only thing that is certain and official is that on July 9, I have to present myself at Milan."
Former club Sao Paulo are also believed to be interested in the 32-year-old.