The procedure, performed on March 3, was the Brooklyn center's second major surgery of the season after he broke his right foot on Dec. 21 during a game at Philadelphia.
''The reason we waited to tell you today was because he saw the doctor and his right foot is healing great. In about a week and a half he'll be out of the boot. His timetable is about the same,'' King said.
King also added that he expects Lopez to be ready in June.
''He'll be out of that boot on the left ankle in I think three, three and a half weeks.''
During Lopez's most recent surgery, King said that the 25-year-old center also had a partial tear in a tendon.
Prior to fracturing his foot, Lopez had missed a total of nine games due to a sprain in his left ankle.
In 17 games this season, the fifth-year center averaged 20.7 points, six rebounds and 1.8 blocks.