Hard to say
First, a doctor has to recognize that (s)he dislikes a patient.
Many doctors will not admit this to themselves, so it comes out in other ways. (s)he may joke about the patient with other doctors as a way to relieve tension, or avoid seeing the patient by cancelling/moving appointments, or may be curt and inattentive when the patient comes in. If you sense your doctor dislikes you, get a new one!