The team announced Thursday that Collins has progressed to drills such as lateral shuffling and individual court work. His status will be reviewed again in seven to 10 days.
Collins was injured in a March 30 loss at Phoenix. He underwent an MRI that showed a lateral ankle sprain and associated bone bruise.
He has missed the past five games for the playoff-contending Hawks, who have dealt with a rash of injuries that have sidelined key players such as De'Andre Hunter, Bogdan Bogdanovic and Cam Reddish for significant periods.
Collins is averaging 18.2 points and 7.8 rebounds per game.