Ravi Gupta, MD has a published paper in BMJ on comparing prior authorization policies between Medicare Advantage insurers and calculating the corresponding number of services and amount of spending in Medicare Part B.

Abstract

Objective To measure and compare the scope of US insurers’ policies for prior authorization (PA), a process by which insurers assess the necessity of planned medical care, and to quantify differences in PA across insurers, physician specialties, and clinical service categories. Read the full article here