The Football Association has charged Chelsea and West Brom with failing to control their players during the 2-2 draw at Stamford Bridge on Wednesday.
The charge relates to an incident in the second half when Blues striker Diego Costa clashed with Claudio Yacob following an off-the-ball tangle between the pair.
A mass confrontation ensued, with players from the home team protesting the referee’s decision not to dismiss Yacob, who had already been booked earlier in a fiery Premier League encounter.
The Argentine midfielder was substituted moments later by Baggies boss Tony Pulis, while Costa was involved in another spat later on when he squared up to Albion goalkeeper Boaz Myhill at the final whistle.
Both clubs have already been reprimanded by English football’s governing body for similar offences this season; the west Londoners were fined for their conduct against Arsenal and West Ham, while the Midlands outfit stepped out of line against Tottenham.
A statement from the FA read: “Chelsea and West Bromwich Albion have both been charged for failing to ensure their players conducted themselves in an orderly fashion.
“The charge relates to an incident which occurred in or around the 58th minute of their fixture on Wednesday 13 January 2016. Both clubs have until 6pm on 20 January 2016 to respond to the charge.”