Reid has made just six appearances this season because of an early-season hamstring problem and then a long spell on the sidelines after he suffered a broken leg against Arsenal in early December.
The Republic of Ireland defender was praised by Baggies coach Steve Clarke for playing the remaining 70 minutes of that game despite the injury.
Reid made his comeback in Sunday's 1-0 home setback against Tottenham.
He said: "It's been a frustrating season with a hamstring injury first and then the broken leg incident.
"I had more praise than stick for playing with a broken leg for 70 plus minutes.
"It's in the past now and hopefully I can do my best now until the end of the season and stay injury free."