The Line Between Medicaid and Marketplace: Coverage Effects from Wisconsin’s Partial Expansion

Context: States have sought to experiment with the income eligibility threshold between Medicaid coverage and access to subsidized Marketplace plans in an effort to increase coverage for low-income adults while meeting other state priorities, particularly a balanced budget. In 2014, Wisconsin opted against adoption of an ACA Medicaid expansion, instead setting the Medicaid eligibility threshold at 100% of the poverty level—a state-funded partial expansion. Childless adults gained new eligibility, while parents and caregivers with incomes between 101–200% of poverty lost existing eligibility. Methods: We use Wisconsin’s all-payer claims database to assess health insurance gains, losses, and transitions among low-income adults affected by this partial expansion. Findings: We find that less than one third of adults who lost Medicaid eligibility definitely took up commercial coverage, and many returned to Medicaid. Among those newly Medicaid eligible, there was little evidence of crowd-out. Both groups experienced limited continuity of coverage. Overall, new Medicaid enrollment of childless adults was offset by coverage losses among parents and caregivers, rendering Wisconsin’s overall coverage gains similar to non-expansion states. Conclusions: Wisconsin’s experience demonstrates the difficulty in relying on the Marketplace to cover the near poor and suggests that full Medicaid expansion more effectively increases coverage.

Comparison of Trends in Nonprofit Hospitals’ Charity Care Eligibility Policies Between Medicaid Expansion States and Medicaid Nonexpansion States

Nonprofit hospitals provide charity care to financially disadvantaged patients according to their self-designed eligibility policies. The Affordable Care Act may have prompted nonprofit hospitals to adopt more generous eligibility policies, but no prior research has examined the longitudinal trend. The expansion of Medicaid coverage in many states has been found to reduce charity care provision, but it is unclear whether the change in charity care eligibility policies differed between Medicaid expansion and nonexpansion states. Using mandatory tax filings, we found that both hospitals in Medicaid expansion states and hospital in nonexpansion states adopted more generous eligibility policies in 2018 than in 2010, but the change was greater in the former for discounted charity care; while the former provided less charity care regardless of their policy changes, the latter provided more when their policies became more generous. This study has implications for policy discussions on the justification of nonprofit hospitals’ tax-exempt status.