Breasts of patients are occasionally seen. Not sexual she is having CPR performed on her to save her life.
Lots of mentions of sexual and physical abuse. As well as child sexual assault
Theres talk encouraging masturbation in some episodes. There's also talk about pole dancing in some episodes.
Female rear nudity is shown.
S2E41 and S6E23 have brief full frontal male nudity.
The season 3 finale has a brief. Full-frame shot of actual childbirth. In the same episode, a male patient absconds from the hospital and strips naked in the street. We see his buttocks.
Two of the male regulars; Dr. Rossi (Kip Gamblin) and Dr. Steve Taylor (Jack Campbell) have brief scenes of rear nudity. S11E38 and S12E9, respectively.