SSDI,
I just sent mine in last month. I put psych, pain management and psych for mine. My original disability is neck and back. SS has got to know that people arent gonna be seeing, like in my case, my ortho doctor all the time. There comes a point when the doctor cant do anything more, then off you more surgery.
Personally, i believe seeing your family doctor on a regular basis, should be just as important, because they really are your lead doctor and will send you to where you need to go.

If SS wants to know just doctors you go to for treatment for your original disability, then they should state that and not hold it against you if your last 3 visits to doctors werent directly related to your original disability.
Hell one of my last 3 visits was to heart doctor for all kinds of medical tests, but i actually didnt list that visit.

Just going to doctors for treatments should be good

good luck