"Good morning, doctor! How is doctor today?"
You should use "bestämd form" doktor
n in both cases above. And some old people can use this kind of expression from time to time. In 25 years it will probably not exist anymore. If a young person says it sounds very sarcastic.
Thanks, she's doing quite well.
But you don't answer about yourself in 3rd person. I think you could have done it 50 years ago. But these days only people with schizophrenia sometimes talk about themselves in 3rd person, like in other countries as well. Actually I don't know any language where you answer about yourself in 3rd person.