No reason why it wouldn't work out, that I can see.

My therapist is a pdoc. I first saw him for medication issues and then asked if I could see him for therapy - I've now been in therapy with him for over four years. He is very good at his job, and much better as a T than either of the two Ts I've seen previously, at least for me, and it has been super useful to have a MD as a T. Other people on PC have also had really great Ts who were also pdocs. Like everything else, it depends 100% on the people involved.