Increasing Divergence in Drug Prices Between the United States and Germany After Implementation of Comparative Effectiveness Analysis and Collective Price Negotiations.

backgroundPayers and purchasers in the United States seek to moderate drug prices and align them with the incremental clinical benefit offered by individual medications; some policymakers have proposed linking U.S. prices to an index of prices paid in other nations. The German health care system resembles that of the United States in featuring multiple private payers but differs in featuring a highly coordinated process of comparative clinical assessment and price negotiations for drugs.

objectivesTo (a) measure trends in prices paid for physician-administered drugs in Germany before and after the mandate for comparative effectiveness assessment and price negotiations in 2011 and (b) compare them with price trends for the same drugs in the United States.

methodsThis study observed trends in the prices paid for 80 physician-administered drugs, which account for approximately half of Medicare Part B drug spending. Quarterly data covering 2004-2018 were obtained for Germany from the Lauer-Taxe database, which contains net prices paid by all German payers. U.S. data were obtained from the Centers for Medicare & Medicaid Services, which publishes net prices paid by private U.S. payers and the Medicare Part B program. These data contain the net prices actually paid after accounting for all discounts and rebates, not merely the manufacturer's list price. Statistical analyses were conducted with multivariable difference-in-differences regression methods.

resultsBefore implementation in Germany of comparative effectiveness analysis and collective price negotiations, net U.S. prices for physician-administered drugs averaged 29.2% higher (95% CI = 26.6%-31.7) than those in Germany. After implementation of comparative effectiveness assessments and price negotiations in 2011, the divergence between U.S. and German prices increased another 28.9% (95% CI = 23.7%-34.3%).

conclusionsCommercial health insurers and Medicare pay significantly higher net prices for physician-administered drugs than do insurers in Germany, with the divergence growing after the mandate in Germany that new drugs be subject to comparative effectiveness assessment and collective price negotiations. The experience of Germany may be of special value for the current U.S. debate over pharmaceutical pricing reform, given the demographic, economic, and health system similarities between the 2 nations. DISCLOSURES: This study was supported by the Commonwealth Fund, New York. The sponsor had no role in the study design, conduct, interpretation, or writing up of results. Whaley reports a grant from the National Institute on Aging, unrelated to this work. The other authors have no potential conflicts of interest to report.