As I said previously, hospitals restrict the number of patients an ER doc sees due to malpractice regulations. The higher number of patients he signs on for when they are admitted, the higher number of chances of malpractice increases. Very standard rule. Also, for the ER docs we place, any incident in the ER that involves blood or bodily cutting/surgery - the ER doc in charge has a required "decompress" time afterwards.
My company enforces this rule because - here is where we get all our business - when our docs go to hospitals, my company pays their malpractice insurance. Not the docs, not the hospitals. This is why we are so much in demand and how we save the hospitals money vs. hiring their own docs.