Her most notable work has been for the medical drama Grey 's Anatomy , for which she has served as writer , producer and supervising producer for over fifty separate episodes .
Joan Rater is an American television producer and screenwriter .
Joan Rater 's most notable work has been for the medical drama Grey 's Anatomy , for which she has served as writer , producer and supervising producer for over fifty separate episodes .
Joan Rater is an American television producer and screenwriter .