States have undertaken a wide range of efforts to evaluate and report on their Medicaid managed care programs to help ensure that public dollars are being put to good use and that Medicaid beneficiaries are receiving high-quality, efficiently administered care. We look at how four states--Arizona, Maryland, Rhode Island, and Virginia--have carried out this responsibility, and draw lessons for other states from their experiences. We highlight lessons that focus on identifying audiences and tailoring evaluations and reports to those audiences' interests and needs.