I find it interesting that they are writing about this as if it is an entirely novel idea... and I am very surprised they are getting a grant But then, it's possible i don't understand the specifics of the program in their entirety.

At my last general practitioner's office, there was both a psychiatric nurse practitioner as well as a part time psychiatrist integrated into the practice.
My GP was a D.O., as was one other GP in the practice. Perhaps that had something to do with it, but not all of the doctors there were. I knew this was not common, but did not think it so terribly novel as the article above is presenting it.

Also, where I am now has integrated practice and services with behavioral and mental health practioners...

I still hold that while it is not common, it is not exceedingly rare, and question that the Harvard practice [which serves the same general area as my current practice BTW] truly needs grants to employ these kinds of changes.

Again, though, it's possible there are innovative ideas that just are not clear from the information provided.

I DO have to say that in my experience, having these providers in the same practice can be very helpful as the communication and general ability to serve a patient seemed to improve [in my case at least] by quite a bit. [EVEN if the individual is not being served by the behavioral or mental health provider in the same practice]