The obvious result is what can't be coded won't get done. Need help appealing an arbitrary rejection of a prescription that should be covered? There's no code for that...you're on your own. Ah, but the insurance company will only talk to the doctor that wrote the prescription! Then the doctor's corporate boss comes down on the doctor for "wasting time". The lesson to the doctor: "I won't do that again" and so writes a different prescription or none at all, despite that being obviously sub-optimal
Yeah, the insurance company knows that throwing up barriers to expensive meds or tests will decrease utilization. Even if they ultimately end up losing appeals they can decrease requests