Part D Formularies Get More Restrictive, but MA-PDs Beat PDPs on Access
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Mar 21, 2024
Medicare Part D formularies are becoming more restrictive over time, asserts new research published in the March issue of Health Affairs. Studying Medicare administrative data that included Part D claims and plan formulary characteristics, researchers from the University of Southern California and Blaylock Health Economics found that utilization management tactics such as prior authorization, step therapy and formulary exclusions became far more commonplace between 2011 and 2020. In 2011, an average of 31.9% of drugs were restricted in some form, vs. 44.4% in 2020.
Restrictions varied based on drug costs and the availability of generic alternatives to brand-name drugs. Nearly 70% of brand-name compounds with no generic alternatives were restricted in 2020, compared to 30% of drugs with generic availability. Additionally, the lower the cost of the drug, the less likely it was to be restricted. In 2020, only 16.7% of drugs with generic availability that cost less than $100 per prescription faced restrictions, vs. 83.7% of brand-name only drugs that cost more than $1,000.
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