from my personal anecdote - i had appendectomy 2 years ago. total for all bills i received during couple month after discharging was about 28k. Out of these $700 for surgery itself and $900 for anesthesia. There were some other bills where my doctor was involved, like follow up visits, but these did not get over $500 aggregated.

So looks like doctor's cost is not that big of a part of the total bill anyway.