Monty Williams, the architect of the NBA's best regular-season team, has been voted the National Basketball Coaches Association Coach of the Year for the second year in a row.
The Michael H. Goldberg award is named after the NBCA executive director.
The NBA will announce the winner of the Coach of the Year award later in the playoffs.
The Suns set a franchise record with a 64-18 regular-season record and will be the No. 1 seed in the NBA playoffs. Phoenix became the first team to exceed its victory total by at least 11 games in three years under Williams.
Sources said that New Orleans' Willie Green, Memphis' Taylor Jenkins, the Clippers' Ty Lue, San Antonio's Greg Popovich and Miami's Erik Spoelstra received votes.
Williams has overseen the evolution of a machinelike precision with these Suns. The 1969-1970 New York Knicks were the only team to finish with a better road win percentage than their home win percentage.
The Suns were the best team in the shot-clock era when leading after three quarters. The Los Angeles Lakers and the Cleveland Cavaliers were the only two teams that went perfect in this scenario in the regular season.
The Suns have had a franchise-record 18-game winning streak and three separate winning streaks of nine or more games this season.
The Suns went 33-9 in clutch-time games this season, the best record in the NBA since the Golden State Warriors went 33-9 in such games in the fall of 2015.