The fine matched the highest in league history and the suspension was the second longest.
Rod Thorn, the NBA's vice president for operations, said the case is unprecedented in his 10 years with the league.
"We've never had anybody go into the stands, unless it was a fight among players that spilled over into the seats," he said Wednesday.
The only longer suspension in league history was handed to Kermit Washington. He was suspended for 26 games during the 1977-78 season for punching Rudy Tomjanovich, who is now the Rockets coach.
Steve George, an Atlanta appliance salesman, said he was shouting "Five points and four fouls, nice game" when Maxwell headed to where he was sitting and slugged him.
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