Medicare and Medicaid have different requirements for marketing by managed care plans. This technical assistance brief provides an overview of Medicare and Medicaid managed care marketing requirements. It also highlights differences between marketing rules for these two programs and resulting challenges facing states that are developing integrated care programs for Medicare-Medicaid enrollees. Finally, the brief summarizes efforts to align managed care marketing rules and practices under Medicare and Medicaid, including new opportunities established by the Centers for Medicare & Medicaid Services through the Financial Alignment Initiative, innovative state approaches, and the Program of All-Inclusive Care for the Elderly.