Impact of Enroll America on the Number of Individuals Covered through the Federally Facilitated Marketplace.

Objective: To assess the impact of Enroll America's field outreach activities on the number of individuals enrolled in Marketplace coverage during the first open enrollment period.

Data Sources/study Setting: Marketplace enrollment for the initial open enrollment period linked with data on Enroll America's field activities and baseline local-area demographic, economic, and health services characteristics.

Study Design: We used a quasi-experimental design, comparing Marketplace enrollment during the first open enrollment period in local areas drawn from Enroll America field states to a comparison group of local areas drawn from states that were not served by Enroll America's field effort, but that otherwise match up well with Enroll America states.

Principal Findings: We find evidence of a large, positive effect of Enroll America's field outreach on Marketplace enrollment in non-Medicaid expansion states. Across model specifications, the Enroll America effects on Marketplace enrollment ranged between 10 and 15 percent, with most estimates statistically significant at the 5 percent level.

Conclusions: Enroll America played an important role in the success of individual states' efforts to boost Marketplace enrollment. Enroll American's evidence-driven, grassroots approach could serve as a model for others interested in conducting similar outreach campaigns for Affordable Care Act-related coverage.