Father Sylvan Bernard Baer was a surgeon. Mother was Arlette Jean Goldberg.
Pediatric intern, Childrens Hospital, East Hollywood, California, USA. 
Besides medical degree, also holds master's degrees in education and sociology from Harvard.
Made several documentaries, worked as science reporter for Cleveland TV station, and then attended American Film Institute in Los Angeles.
After AFI, his boyhood friend from Denver, writer/producer John Wells, hired him in to write for China Beach (1988) (1988-1991). After a stint there, he enrolled at Harvard medical school.
Joined John Wells again, as writer on ER (1994) while he completed his internship in L.A. hospital.
Eldest of six children: Neal Aaron, Simmie Ann, Daniel Jay (married to Jennifer Zaph), David Alan (married to Ann Wright and father of Rachel Zoe), Bryan Gordon (married to Linda Levy and father of Ethan Michael and Rebecca Sophia) and William Ian.