Derby County boss Frank Lampard has been charged with improper conduct by the Football Association following Friday's 2-2 draw at Birmingham City.
"It is alleged his language and/or behaviour on the field of play after [the game ended] amounts to improper conduct," an FA spokesperson said.
Lampard, 40, has until 18:00 BST on Monday to respond to the charge.
The sixth-placed Rams face play-off rivals Bristol City on Saturday, before Wednesday, 1 May's trip to Swansea.
The former England international - who is in his first managerial role - was fined £2,000 in September after accepting a charge of improper conduct when protesting against a handball decision.