The only gift I can think of that would be appropriate for the typical nephrologist is an exploding cigar or a music box with a ticking time bomb in it.
Lets see here..ya already bought him a Mercedes, a Beemer, a Vette, a big house, a vacation home, and a few girlfriends. What else ya gonna give him?
Our clinic has a no gift policy which is published in the newsletter every holiday season.