The league says Tyler Johnson's tip-in with 1 minute 8 seconds remaining should have been ruled offensive goaltending.
The Wizards look to claim the season series Friday at Verizon Center.
Washington will wear "Los Wizards" jerseys Friday.
The Wizards had their six-game winning streak snapped Sunday vs. the Suns.
Big man has come off the bench since returning from plantar fasciitis in his right foot.
Paul Pierce wasn't happy with Washington's defense against the struggling Heat, even after a victory.
The teams meet for the third time this season.
Pierce missed the Wizards' win over the Utah Jazz on Wednesday because of a sore right big toe.
Pierce was a partial participant at practice Thursday after being sidelined Wednesday.
Nene has been sidelined with right plantar fasciitis.