Managed Long-Term Services and Supports Design Plan Supplement: Interim Outcomes Evaluation

The Medicaid 1115 Demonstration Evaluation Design plan, prepared by Mathematica Policy Research and submitted to the Centers for Medicare & Medicaid Services (CMS) in May 2015 (Irvin et al. 2015), proposed a theoretical evaluation strategy for MLTSS programs. Since submitting the design plan, we have evaluated potential data sources and revised our approach to the interim outcomes evaluation. This design supplement presents our revised approach, serving as a bridge between the design plan and the interim outcomes evaluation that we will conduct in 2017.