The FA has charged Derby manager Frank Lampard with misconduct following his side's 2-2 draw at Birmingham on Friday.
Lampard felt referee Simon Hooper had denied Derby a clear penalty as they twice came from a goal behind to salvage a point.
In a statement, the FA said the former Chelsea midfielder had been charged over his reaction at the final whistle.
"It is alleged his language and/or behaviour on the field of play after the conclusion of the fixture amounts to improper conduct," the statement said.
Lampard has until 18:00 BST on Monday to respond to the charge and could face a touchline ban as his side attempt to secure a place in the Championship playoffs (screened on on ESPN +).
He was also charged with misconduct after being sent to the stands during a defeat at Rotherham earlier in the season.