Provider Variability in Intensity Modulated Radiation Therapy Utilization among Medicare Beneficiaries in the United States

Publication date: Available online 16 February 2018
Source:Practical Radiation Oncology
Author(s): Stephen R. Grant, Benjamin D. Smith, Anna O. Likhacheva, Shervin M. Shirvani, David B. Rosen, B. Ashleigh Guadagnolo, Dean A. Shumway, Emma B. Holliday, Daniel Chamberlain, Gary V. Walker
BackgroundIn this study, we sought to examine the variation in intensity modulated radiation therapy (IMRT) use among radiation oncology providersMethodsThe Medicare Physician and Other Supplier Public Use File was queried for radiation oncologists practicing during 2014. Healthcare Common Procedural Coding System code 77301 was designated as IMRT planning with metrics including number of total IMRT plans, rate of IMRT utilization, and number of IMRT plans per distinct beneficiary.ResultsOf 2,759 radiation oncologists, the median number of total IMRT plans was 26 (mean 33.4, SD 26.2, range 11 to 321) with a median IMRT utilization rate of 36% (mean 43%, SD 25%, range 4% to 100%) and a median number of IMRT plans per beneficiary of 1.02 (mean 1.07, range 1.00 to 3.73). On multivariable analysis, increased IMRT utilization was associated with male gender, academic practice, technical fee billing, freestanding practice, practice in a county with 21 or more radiation oncologists, and practice in the South.(p<0.05). The top one percent of utilizers (28 providers) billed a mean 181 IMRT plans with an IMRT utilization rate of 66% and 1.52 IMRT plans per beneficiary. Of these 28 providers, 24 had billed technical fees, 25 practiced in freestanding clinics, and 20 practiced in the South.ConclusionsTechnical fee billing, freestanding practice, male gender, and location in the South were associated with one or more metrics of increased IMRT use. A small group of outliers shared several common demographic and practice-based characteristics.



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