She is most famous for portraying lab technician Mandy Webster on CSI: Crime Scene Investigation.

Rappaport made her television debut with a guest role on Clarissa Explains It All.

She portrayed the Amazon Otere on Xena: Warrior Princess, and also made guest appearances on 7th Heaven, The Drew Carey Show, The District and Strong Medicine.

Apart from CSI, Rappaport also portrayed Officer Mary Franco in seasons 7 and 8 of NYPD Blue.

Other roles include a manipulative Catholic schoolgirl in the 1996 teen horror film Little Witches, and as Lois Lane in the Blayne Weaver film, Losing Lois Lane.