Professional component payment reductions for diagnostic imaging examinations when more than one service is rendered...

The aim of this study was to assess potential physician work efficiencies when more than one diagnostic imaging study is interpreted by the same provider during the same session.

Medicare Physician Fee Schedule data from the American Medical Association Resource-Based Relative Value Scale Data Manager for 2011 were analyzed to quantify relative contributions of preservice, intraservice, and postservice physician work to the total work of rendering diagnostic imaging services. An expert panel review identified potential duplications in preservice and postservice work when multiple examinations are performed on the same patient during the same session. Maximum potential percentage work duplication for various diagnostic imaging modalities was calculated and compared to US Government Accountability Office estimates.

The relative contributions of preservice and postservice work to total work varied by modality, ranging from 20% [computed tomography (CT)] to 33% (ultrasound). The maximum percentage of potentially duplicated preservice and postservice activity ranged from 19% (nuclear medicine) to 24% (ultrasound). Maximum mean potentially duplicated work relative value units ranged from 0.0212 for radiography to 0.0953 for magnetic resonance imaging (MRI). Maximum percentage work reduction ranged from 4.32% for CT to 8.15% for ultrasound. This corresponds to maximum professional Physician Fee Schedule reductions of only 2.96% (CT) to 5.45% (ultrasound), approximating an order of magnitude less than the Government Accountability Office's recommendations.

Although potential efficiencies in physician work occur when multiple services are provided to the same patient during the same session, these are highly variable and considerably less than previously estimated.