To support stakeholder engagement in Massachusetts around proposed changes to programs serving individuals who are dually eligible for Medicare and Medicaid, the Center for Health Care Strategies partnered with Manatt Health to create a primer illustrating the population’s diverse needs. The primer describes current and proposed program options for dually eligible members and profiles a group of dually eligible MassHealth members enrolled in integrated care to reveal the varied life circumstances that lead members to become dually eligible. While focused on the Massachusetts landscape, insights in the report may be valuable to stakeholders in other states.