To save bandwidth I'll post a link rather than copy paste the provision. As I read it, it appears that the WC insurance is mandatory in AZ. and that the owner is liable. Apparently the injury itself is proof enough of negigence on the owners part and the onus is on the owner to prove otherwise. As far as the surgeon goes there must be more to it than that. I would think that if the friend was indigent than the surgeons office would be able to direct him to available aid rather than just dismiss him. So again the bottom line is consult an attorney that specializes in WC law.
Frizbee, contact me, I have a contact for you in the AZ State Gov't.
Anyway here's the link:
http://www.azleg.state.az.us/FormatD...23&DocType=ARS