Terence Spies pointed me to the rather entertaining
Dr. McNinja:
Going to the doctor would be a lot more interesting if my primary care physician were a ninja. They'd probably do a better job of dealing with the insurance company, too...
I'm not sure about having a ninja GP. I'm afraid he would adopt Clouseau-Kato diagnostic techniques:
After jumping out of the autoclave and stopping his slashing katana a hairsbreadth from your throat: [sniff] [sniff] [peering into your shorts as he pulls the waistband back] "Somebody has not been eating an adequate amount of fiber." "But no blood in the stool. Excellent."