Luiz was left out of the squad for Chelsea's most recent match with Conte describing the move as a "tactical decision".
When asked if Luiz was in contention for the fixture at the Hawthorns, Conte said: "Yes, David Luiz is in the squad.
"I repeat; it was a technical decision. Every single player has to react well and accept my decision."
However, Conte was reluctant to be drawn on his relationship with the Brazilian defender, saying: "I'm here to speak for the team before an important game against West Brom, and not to speak about a single player.
"I like to speak about the team, about the next game in which we have to pay good attention."