Chicago Hope

A doctor who has performed a surgery is in charge of the patient's post operative care. Dr. Schapira would not have been brought in if Austin operated. Even if the parents requested him, it would be professional courtesy to have declined.

It was never explained why Barney was in the hospital in the first place when he fell and broke his hip. No other doctor consulted on his case, so he wasn't being treated by anyone else; and there was no reference to anyone else he might have been visiting. Certainly, no one else in the hospital visited him, as you'd might expect if he was there to see someone.