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This post picks up where the last one left off, further examining potential partial explanations for why ACA marketplace enrollment declines on HealthCare.gov in 2019 were much sharper in states that have expanded Medicaid than in states that have refused the expansion. I raised a question in that post, bolded in the excerpt below.
This post picks up where the last one left off, further examining potential partial explanations for why ACA marketplace enrollment declines on HealthCare.gov in 2019 were much sharper in states that have expanded Medicaid than in states that have refused the expansion. I raised a question in that post, bolded in the excerpt below.
Enrollment changes by income, HealthCare.gov states
2019 enrollment as a percentage of 2018, as of the end of OE in each year
* Excluding Virginia and Maine Source: CMS state-level public use files
State group Total enrollment 100-150% FPL 150-200% FPL 100-200% FPL 200-400% FPL Unsubsidized Expansion* 93% 93% 91% 92% 95% 88% Nonexpansion 99% 100% 98% 100% 102% 82%
The enrollment performance gaps at 100-200% FPL and 200-400% FPL are comparable. I would be tempted to suggest that the gap at 100-150% FPL is due to the concentration of low income enrollees in the nonexpansion states (those at 100-138% FPL, who pay less for top-level CSR silver plans than do those at 138-150% FPL), and that the gap at 200-400% FPL is due to stronger silver loading in the non-expansion states. But the large performance gap at 150-200% FPL kind of belies that -- unless, perhaps, silver loading at that income level is pulling more prospective enrollees into free or ultra-cheap bronze plans in the nonexpansion states. In the silver loading era, silver plan selection at 150-200% FPL has dropped from 83% in 2017 (pre silver loading) to 76% in 2019 in HealthCare.gov states. The lure is bronze coverage that is often free at that income level, while benchmark (second cheapest) silver costs about $130/month at 200% FPL. I guess I need to test whether bronze selection in this income band has risen faster in nonexpansion states.

