Budgets Propose Eliminating Interchangeability Status for Biosimilars

When then-President Barack Obama signed the Affordable Care Act (ACA) into law on March 23, 2010, he established the 351(k) biosimilar pathway via the Biologics Price Competition and Innovation Act (BPCIA), which amended the Public Health Service (PHS) Act. Since then, the FDA has approved almost 50 biosimilars, with nearly one fifth of those gaining interchangeable status. That distinction, however, has been increasingly under fire, most recently in President Biden’s fiscal year (FY) 2025 budget, which proposes eliminating the interchangeability designation entirely. That could help boost uptake of biosimilars, resulting in prescription drug savings, say some industry experts.

In contrast to the EU, whose European Medicines Agency (EMA) and the Heads of Medicines Agencies (HMA) clarified in September 2022 that all biosimilars approved in the EU are interchangeable, the FDA has created two levels of biosimilars: biosimilars and interchangeable biosimilars.