Medicaid 1115 Demonstration Evaluation Design Plan

This report lays out the general design and approach Mathematica will use to evaluate four types of Medicaid section 1115 demonstration waivers: (1) Delivery System Reform Incentive Payments (DSRIP), (2) Premium Assistance Medicaid expansions, (3) Beneficiary Engagement/Premium Payment demonstrations, and (4) Managed Long-Term Services and Supports (MLTSS) programs. This plan focuses on the research questions that will guide the work and discusses relevant outcome measures, data sources, and general methodological approaches.