Nurse Nancy appears as one of the virtual evil nurses in the 1998 X-Files episode "Kill Switch". She is played by the actress Kate Luyben.
Nurse Nancy is a virtual nurse who gets into Mulder's head. She pleads for Mulder to tell her where the Kill Switch is. He wakes to find that the nurses have assisted in amputating his arms and legs. When Scully appears in the hospital room, she knocks out the unknown brunette and other blonde nurses, before doing the same to Nurse Nancy.
There is now conclusive evidence to her demise or not, but she is virtual, so it was all in his mind. The other bevy of buxom nurses are unnamed in the episode.