Study Offers Clues About Biosimilar Uptake Drivers, Barriers

With policymakers and industry stakeholders increasingly focused on the cost savings opportunities tied to biosimilars, a new Health Affairs study sheds light on some of the factors that influence uptake of these near-copies of pricey biologic medications.

Among almost 200,000 commercial and Medicare Advantage enrollees who newly initiated one of seven biologic drugs with available biosimilar versions — filgrastim, bevacizumab, epoetin alfa, trastuzumab, pegfilgrastim, infliximab and rituximab — the share of people initiating a biosimilar increased from 1% in 2013 to 34% in 2022. Patients who were younger than 18 years were less likely to initiate a biosimilar than other age groups. Meanwhile, enrollees in commercial high-deductible health plans were more likely to use a biosimilar, compared with those in MA plans.