So are you saying that you as the biller need to see proof that the stress test was actually done before you can bill for it?
That doesn't make much sense to me, because if I needed to see proof that every procedure, test, x-ray, and office visit was done before I billed it, I wouldn't be billing anything, for most of my remote work.
I guess I am not exactly clear on what you are asking, and if you are coming at it from a billing or coding perspective, or both.