Is your practice experiencing a growing burden from escalating prior authorization requirements? Probably so. We recently analyzed our data for multiple radiation oncology billing clients and discovered a significant trend. Prior authorization requirements have increased each year for the past three years. The authorization requirements varied considerably by client, but overall authorizations have increased approximately 20% during the past three years. In 2015 our average client using authorization services, needed prior authorization for 26% of all courses of treatment. During the same period in 2017 the ratio has grown to 31% of total courses of treatment requiring prior authorization.