The next 12–18 months could be a critical time for biosimilars in the United States (1). This product class has grown rapidly since passage of the Biosimilars Price Competition and Innovation Act (BPCIA) of 2010. That landmark legislation allowed for biosimilar market approvals based on previously approved “reference products,” creating an expedited pathway that reduces biosimilar development costs and speeds regulatory review so patients get faster access to essential medicines. Increased competition from biosimilars could save the US healthcare system…