The Affordable Care Act (ACA) significantly modernized and streamlined Medicaid enrollment and renewal processes across all states. Through major investments of time, money, and staff, most states have implemented modernized systems that transformed lengthy, paperwork driven enrollment and renewal procedures to a simplified, technology-driven experience that minimizes burdens on individuals and states. Recently approved and proposed waivers and other proposed policies include new eligibility and enrollment requirements and restrictions that run counter to the ACA’s streamlined processes (Figure 1). This fact sheet provides an overview of how enrollment and renewal processes changed under the ACA and the implications of emerging waivers and other proposed changes on streamlined enrollment and renewal.