Diego Costa was involved in a confrontation with Baggies players
Chelsea and West Brom have both been hit with fines after stormy scenes during their Premier League game at Stamford Bridge earlier this month.
Chelsea must pay £65,000, while their opponents have to shell out £35,000.
A mass confrontation occurred after a clash between Diego Costa and Claudio Yacob.
Ireland winger James McClean, who was booed throughout that game by the Chelsea home crowd, scored West Brom's late equaliser in that 2-2 draw.
The ill-tempered match was then followed by a confrontation between Costa and a number of West Brom players.