Of course, for this question the physical itself needs to be defined; I'll define it simply as the popular use of it today in physics - either an actual, material substance, or a physical concept such as gravity, force, kinetic energy, planck size etc.
Now non-physical entities/concepts may be (but not necessarily exclusive to) mental substances/concepts (I'm using it merely because it's the best [and perhaps the only] example for non-physicality).
And for the question - can a physician talk, within the academic scope of physics, about those non-physical concepts and use it in relation to the physical concepts? Or is that in a different department?
I'm asking both theoretically on the meaning of physics and practically in the published papers. If some physician did such thing (put non-physical in his research) I'd be happy to get a reference.