Carter had the procedure at the Hospital for Special Surgery in New York and there is no timetable for his return.
"The health of our players is our primary concern," said Sixers general manager Sam Hinkie. "There were a number of healthy discussions between Michael, our medical team, several medical specialists and Michael's representatives. After careful consideration and thoughtful research, we collectively agreed that it was in Michael's best interest to move forward with the procedure now and allow for maximum recovery time."
Carter-Williams was only the third rookie since 1950-51 to lead all first-year players in scoring (16.7 points per game), rebounds (6.3) and assists (6.2), joining Oscar Robertson in 1960-61 and Alvan Adams (1975-76).
The 22-year-old was the 11th pick in last year's draft out of Syracuse. He was the first player picker 10th or lower to win Rookie of the Year since Mark Jackson in 1987. SI WIRE: Nets' Paul Pierce: Dislike of LeBron James 'more of a basketball thing'