I had that argument with a former doctor (he fired me). I was expecting a call from a speciality pharmacy, no call, no message. When he asked how I was handling the drug I told him I was still waiting for the call. He gave me a lecture about always answering phones on a strange number, my reply was if it was important they'd leave a message. He wasn't pleased.
It was one of several problems we had with each other (my wife asked too many questions)
It turns out his assistant never followed thru with sending information to the pharmacy.