Abstract
To determine whether annual changes in prices for clinician-administered drugs are associated with changes in patient out-of-pocket costs. National commercial claims database, 2009 to 2018. In a serial, cross-sectional study, we calculated the annual percent change in manufacturer list prices and net prices after rebates. We used two-part generalized linear models to assess the relationship between annual changes in price with (1) the percentage of individuals incurring any out-of-pocket costs and (2) the percent change in median non-zero out-of-pocket costs. We created annual cohorts of privately insured individuals who used one of 52 brand-name clinician-administered drugs. List prices increased 4.4%/yr (interquartile range [IQR], 1.1% to 6.0%) and net prices 3.3%/yr (IQR, 0.3% to 5.5%). The median percentage of patients with any out-of-pocket costs increased from 38% in 2009 to 48% in 2018, and median non-zero annual out-of-pocket costs increased by 9.6%/yr (IQR, 4.1% to 15.4%). There was no association between changes in prices and out-of-pocket costs for individual drugs. From 2009 to 2018, prices and out-of-pocket costs for brand-name clinician-administered drugs increased, but these were not directly related for individual drugs. This may be due to changes to insurance benefit design and private insurer drug reimbursement rates.
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