Key Points Question How has the concentration of health care spending in the US changed by population subgroup and expenditure type between 2001 and 2018? Findings In this cross-sectional study,… Click to show full abstract
Key Points Question How has the concentration of health care spending in the US changed by population subgroup and expenditure type between 2001 and 2018? Findings In this cross-sectional study, the overall concentration of health care expenditures remained stable, although there was a sharp increase in the concentration of spending on prescription drugs. In 2001, one-half of all expenditures on prescription drugs were concentrated in 6.0% of the US population, but by 2018, this proportion had decreased to 2.3% of the population. Meaning These findings suggest that if this trend continues, it will have implications for the minimum scale of risk-bearing and drug management needed for health insurance plans to operate efficiently, as well as the optimal cost-sharing features of insurance products.
               
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