A Dr called the ER? That just seems weird.
That is the procedure. So they can be prepared with proper garb and swabs.
This has been the procedures for weeks.
Plus he is a neurosurgeon. They would not likely know who he was in a large hospital. They come in different doors (not trying to be a wise ass...they come into a different place in the hospital.)
Then, they would give him a ration of shit for not following the procedures. Lol.