Hello aspirant, hope you are doing great!

Well anyone who has completed a MBBS or BDS(special case is a Ph.D) degree can add Dr. as a prefix before their names. MD Emergency medicine is a specialization course that is done only after one completes MBBS.

So, emergency medicine physicians do use Dr. as a prefix before them. In fact, they can do it right after they completed their MBBS.

Hope your query is cleared:)