2023 may be a pivotal year for biosimilars in the U.S. with a number of approved Humira (adalimumab) biosimilars set for staggered launches under agreements with Abbvie Inc. How successful those launches are, including the launch of Boehringer Ingelheim GmbH’s interchangeable, Cyltezo, and potential other interchangeables, will be determined in large part by three pharmacy benefit managers that together control the prescription drug formularies for nearly 80% of Americans covered by Medicare and private insurance.