Coverage expansion for Medicaid improves access to care and health outcomes for people with substance use disorder (SUD). In spite of that evidence, as of May 2023, 10 states have failed to expand Medicaid funding to low-income adults as emergency enrollment protections established for COVID-19 end. This coverage gap in the non-expansion jurisdictions denies access to care to more than 1.9 million people living in Alabama, Florida, Georgia, Kansas, Mississippi, South Carolina, Tennessee, Texas, Wisconsin, and Wyoming.