Evolving Use of Prebiopsy Prostate Magnetic Resonance Imaging in the Medicare Population.

Abstract

We assessed the changing use of prebiopsy prostate magnetic resonance imaging in Medicare beneficiaries. Men who underwent prostate biopsy were identified in 5% Medicare RIFs (Research Identifiable Files) from October 2010 through September 2015. We evaluated the rate of prebiopsy prostate magnetic resonance imaging, defined as any pelvic MRI 6 months or less before biopsy with a prostate indication diagnosis code. Temporal changes were determined as well as variation by geography and among populations. In male Medicare beneficiaries the prebiopsy magnetic resonance imaging use rate increased from 0.1% in 2010 to 0.7% in 2011, to 1.2% in 2012, to 2.9% in 2013, to 4.7% in 2014 and to 10.3% in 2015. In 2015 the prebiopsy prostate magnetic resonance imaging rate varied significantly by patient age, including 5.7% for greater than 80 years vs 8.4% to 9.3% for other age ranges (p = 0.040) as well as by race, including 5.8% in African American vs 10.1% in Caucasian men (p = 0.009) and geographic region, including 6.3% in the Midwest to 12.5% in the Northeast (p <0.001). The rate was highest in Wyoming at 25.0%, New York at 23.7% and Minnesota at 20.5% but it was less than 1% in 10 states. Historical Medicare claims provide novel insights into the dramatically increasing adoption of magnetic resonance imaging prior to prostate biopsy. Following earlier minimal use the performance increased sharply beginning in 2013, exceeding 10% in 2015. However, substantial racial and geographic variation exists in adoption. Continued educational, research and policy efforts are warranted to optimize the role of prebiopsy magnetic resonance imaging and minimize sociodemographic and geographic disparities.