It means the England forward could be hit with a further ban to damage the Premier League leaders’ title bid.
He was sent off after receiving a second yellow card for diving in Sunday’s 2-2 draw with West Ham and the charge relates to his reaction to the decision.
Vardy responded furiously, pointing and shouting in the face of referee Jonathan Moss before leaving the pitch following his tangle with Angelo Ogbonna.
He is suspended for Sunday’s visit of Swansea and Leicester face the possibility of losing the 29-year-old for longer if his behaviour is deemed worthy of further punishment. Vardy has requested a personal hearing.
The news came shortly after Vardy was one of four Leicester players named in the PFA Premier League team of the year Leicester and Tottenham make up the majority of the year, with eight of the notional 11 coming from the two sides.
The team was due to be announced at the PFA awards on Sunday, but the unveiling was brought forward.
Included in the side are Leicester quartet Vardy, Wes Morgan, N’Golo Kante and Riyad Mahrez, with Tottenham’s Toby Alderweireld, Danny Rose, Dele Alli and Harry Kane also named.
The three remaining slots go to Manchester United stopper David De Gea, Arsenal full-back Hector Bellerin and West Ham’s Dimitri Payet.
No Irish player made the top flight cut but Brentford’s Irish midfielder Alan Judge was named in the Championship team of the year.
Elsewhere, Gillingham defender John Egan was selected on the League One team, Northampton’s John-Joe O’Toole made the League Two version while Chelsea’s Niamh Fahey was included in the Women’s Super League XI.
Premier League Manager of the season
Premier League Player of the season
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