Here are a few of my favorites:
A doctor gave a man six months to live. The man couldn't pay his bill, so he gave him another six months.
The Doctor called Mrs. Cohen saying, "Mrs. Cohen, your check came back." Mrs. Cohen answered, "So did my arthritis!"
The Doctor says, "You'll live to be 60!" "I AM 60!" "See, what did I tell you?"
The patient says, "Doctor, it hurts when I do this." "Then don't do that!"
"Doctor, my leg hurts. What can I do?" The doctor says, "Limp!"
"Doctor, I have a ringing in my ears." "Don't answer!"