Dr. Cox is the senior attending physician at Sacred Heart Hospital and Residency Director for the hospital. Dr. Cox routinely rants at and belittles J.D., though his apparently rough treatment of J.D. is intended as conditioning for the rigors and horrors of hospital life, as well as an outlet for Cox's frustration in his life. It is hinted that he is secretly proud of J.D. and thinks he has the potential to become a great doctor.Dr. Cox is sarcastic and narcissistic, with a cruel wit. He is also very concerned about the way he is perceived in the hospital, often making very illogical and self-destructive decisions in order to keep his bad boy image. However, he is a very skilled doctor (in one episode, a local magazine names him best in the city) and is able to make his boss Bob Kelso (Ken Jenkins) admit he is the best doctor at the hospital. Work seems to consume Dr. Cox, and he likes to feel needed in the hospital. When suspended in the first season, he stays at the hospital and continues working. Kelso, in a rare moment of connection between the two characters, told Cox in season five that being needed is who he is, and that he can't change that.He uses nicknames for most of the other main characters on the show: he calls J.D. Newbie and a vast assortment of girl's names, Turk is Gandhi and Turtle Head, Kelso is Bobbo and sometimes Bobcat, Beelzebob and even once The Bobbotron, Sacred Heart legal counsel Ted Buckland is Flop Sweat or Sweaty Teddy, Janitor is Stretch and Lurch, and Elliot Reid is Barbie and Blondie. The only member of the main cast he always calls by their actual name is Carla Espinosa. Despite his brilliance, Cox has, for the most part, failed to rise up the professional ladder because he refuses to accept help from others. Cox's bitterness about his static career and frustration in his personal life is released roughly once a year, when he flies off the handle about some minor event at work and goes out on a drinking binge, coming back the next day as if nothing had happened. Dr. Cox is often seen drinking scotch and has acknowledged that he has a drinking problem. Cox goes to work drunk, a behavior he had criticized J.D. and Turk for in a previous episode. His son Jack's first full sentence is daddy drinks a lot. Dr. Cox does not like dermatologists, surgeons and private practice physicians. He hates religion and Christmas. Cox is legally divorced from Jordan Sullivan but the two have maintained an exclusive relationship together since Jordan discovered she was pregnant. As revealed in flashbacks, the marriage appears to have started out strongly, but went downhill and eventually ended when Jordan slept with Dr. Cox's then-protegé Peter Fisher. Cox was best friends with Jordan's brother, Ben, who died from leukemia as a result of not having it checked, and he happened to be under JD's care. He has two children with Jordan: A son named Jack and after unsuccessful vasectomy, he has a newborn daughter named Jennifer Dylan (J.D).