Sources told ESPN.com that it has become apparent to the team's medical staff in recent days that it is no longer feasible for Kidd to coach through the pain, as he has done through Milwaukee's first 29 games.
By undergoing surgery this coming week, sources said, Kidd would have a chance to return to the bench in February. Kidd's right hip, which began bothering him late in his playing career, has progressively worsened this season.
The Bucks, though announcing his status as indefinite, hope Kidd will be sidelined only four to six weeks and thus be able to return to the bench in February, sources said.
"It's been chronic for the last three to four years, since I was in Dallas the last time," Kidd said in an interview with "Bucks TV", according to the Milwaukee Journal-Sentinel. "The pain has been to the point where I can't function.
"I've taken all the medicine I can do. Talking to the doctors, there's really no good time to do the surgery. I have to fix myself, and then we move on and get back to work.
Sources said veteran assistant coach Joe Prunty, who filled in as Milwaukee's head coach when Kidd was suspended for the Bucks' loss at Orlando in late November, will serve as interim coach while Kidd recuperates.
Kidd's absence will serve as the latest blow in a season of struggles for the Bucks, after he coached last season's upstarts to a surprising 41-41 mark in his Milwaukee debut. Kidd came to the Bucks after leading the Brooklyn Nets to the playoffs as a rookie coach in 2013-14.
Amid high expectations this season for the Bucks' young squad in the wake of the offseason signing ofGreg Monroe, Milwaukee has slumped to an 11-18 start despite ranking as the only team in the league to beat 26-1 Golden State this season and nearly repeating the feat Friday night on the Warriors' floor.
Bucks snap three-game skid
Michael Carter-Williams scores 20 points to help the Bucks break a three-game losing streak after defeating the Suns 101-95.