University of California, Los Angeles and UnitedHealthcare (UHC) are partnering to evaluate two interventions designed to better manage care for UHC Medicaid members. Accountable Care Communities is an UHC-led initiative that provides community practices with training, real-time clinical dashboards, and shared savings to improve care delivery for high-risk members. Health Homes are a model of “whole-person” care for patients with chronic conditions authorized by the Affordable Care Act. The evaluation will utilize longitudinal, quasi-experimental approaches that rely on contemporaneous comparison groups to estimate the impact of these interventions on clinical, utilization, and cost outcomes among persons with diabetes and pre-diabetes.