"She is married to a doctor." = This is the correct form. Good luck!

1 - she is married to a doctor. “To” is a preposition word. Marriage is an act that is committing two people together by a third person. If we were to translate this to future tense - “we are going to get married”. It wouldn’t be grammatically correct in English to say marry with, although I know in other languages, like Spanish, it proves to be otherwise.

People say married to someone. Married with sounds strange. Hope that helps!

She is married to a doctor You could also say "she married a doctor"

It is correct to say, She is married to a Doctor.