Asshole DR's

At the place I work at we have a "house" dr and he is such an asshole that I feel like pt care sometimes gets neglected b/c he's no MEAN! anytime you call him to do YOUR job he yells and has a fit and the administrater knows what a jerk he is. I have tried to be nice I have tried hanging up the phone on him when he's being rude but nothing gets threw to this man! But when he's face to face he's nice...what to do?