Jackie and Sagan were personal favourites of mine. I love that they expanded her role over the course of the series. I also once found a discussion thread somewhere where two women discovered they were both named Sagan after Sagan Lewis. I wonder how many more there are?
Lewis was 63, and last year re-married her ex, St. Elsewhere writer/producer/showrunner Tom Fontana. Our prayers are with her family and friends at this time of mourning.
Variety - Sagan Lewis, 'St. Elsewhere' actress, Dies at 63
Entertainment Weekly - Sagan Lewis, St. Elsewhere star, dies at 63