Carla Espinosa
Carla appeared in every episode during the first eight seasons except three Season 8 episodes, "My Happy Place", "My Cookie Pants", and "My Full Moon". She worked as the head nurse at Sacred Heart Hospital, in which the main action of the show takes place.
Judy Reyes was a regular cast member for the first eight seasons, and is the only original cast member not to return for season nine, though her character was still mentioned. According to Donald Faison, who plays Carla's husband Christopher Turk, Carla becomes a stay-at-home mother following the birth of their second daughter, explaining the character's absence from season nine. Provided by Wikipedia