Slight accident...

Last week I was taken to the St Thomas hospital London with a possible concussion after falling against the door in my house.

Doctor asked me a series of questions:
Do you know where you are?
I’m at the St Thomas hospital I replied
What town are you in?
London I replied.
Do you know who I am?
Yes your Doctor Hamilton I replied.

Doctor said that he was going to go away for a little while and come back. After he left I turned to my friend who had taken me to the hospital and said,
I hope he doesn’t ask me any more questions.
Why? She asked.
I replied,

Spoiler:

Because all of the answers were on his badge.