The U.S. healthcare system is undergoing significant transformation, shaped by shifting patterns in medicine use, evolving patient cost burdens, changing benefit designs, and rising spending driven by innovation. At the same time, structural barriers in access and affordability continue to present persistent challenges for patients, often leading to patients who may need medicines the most not receiving them. Together, these dynamics define a market that is expanding in complexity while also signaling important opportunities for system-level improvements. As discussions continue around access and affordability, policymakers, payers, and manufacturers have an opportunity to implement meaningful change to ensure sustainability of the U.S. healthcare system and that patients are able to benefit from the full potential of medical advances.