Well if we say the doctor was getting paid a very generous $300 an hour for that work, that's $450.
Plus seeing the front desk person for a few minutes, we'll give a generous $50.
So that's $500 for some very well paid employees.
We'll throw another very generous $50 in for the antibiotics, making it $550.
Double it so the hospital can take a very large cut, and your total is $1100.

So even leaving massive profit margins with those numbers, you still got ripped off an extra ~$5000.