How do you write Prefix DR or Dr for non medical PhD holder?

The person with the PhD (Doctor of Philosophy) or the Ed.D (Doctor of Education) or any other kind of doctoral degree is abbreviated as Dr. For example, the wife of US Vice President Joe Biden is Jill Biden, but she prefers to use her title Dr. Jill Biden; she received a Doctor of Education from the University of Delaware and is a college professor. (It should be noted that Dr. Seuss was enrolled in a PhD program, but by most accounts, never finished the degree. However, he was not trying to fool people: he created "Dr. Seuss" as a pen name-- his real name was Theodor Seuss Geisel.)