Unlike the MD who does not need to produce any original research, the person earning a PhD must produce original research and write it up in a thesis or dissertation.

In this week's "Five questions with" feature, meet Dr. Paul Scheatzle, medical director at Aultman Woodlawn's rehab program.

DO vs. MD There are a few differences in DOs and MDs, but the most notable difference is between their philosophical approaches to medicine.

What is the difference between a DO and an MD? The key difference between DOs or doctor of osteopathic medicine and MDs or allopathic physicians is that DOs are trained to take a holistic approach.