1. Shrank WH, Rogstad TL, Parekh N. Waste in the US health care system. JAMA. 2019;322(15):1501–1509.... 2. Smith-Bindman R, Kwan ML, Marlow EC, et al. Trends in use of medical imaging in US health care systems and in Ontario, Canada, 2000–2016. JAMA. 2019;322(9):843–856. 3. Medpac. Report to the Congress: Medicare payment policy. March 2020. Accessed April 5, 2020. http://medpac.gov/docs/default-source/reports/mar20_entirereport_sec.pdf 4. Caverly TJ, Prochazka AV, Cook-Shimanek M, et al.