Please correct me if I'm wrong here: You save $45 on the professional services, but you still pay the same facility fee (~$1000), the CT scan still costs the same (~$5000), labs are still the same (~$110)... etc. So maybe you have saved ~1% seeing an NP, hence why I said "billed the same", although you are correct that they are not the exact same. Now imagine that a NP orders a CT scan that was unneeded 1% more often than a physician, at this point it costs more on average to see the NP.