What we know about how the structure of Marketplaces and Medicaid expansion affect enrollment

By Emma Sandoe

It is fairly obvious that states that expanded Medicaid saw greater enrollment in Medicaid after the opening of the Health Insurance Marketplaces in October 2013 than states that did not expand. CMS has been releasing monthly reports that indicate just that.

This also corresponds to the reductions in uninsurance. States that expanded Medicaid clearly have seen greater reductions in uninsurance than states that elected not to expand. The US Census Bureau recently posted the maps below in their blog “Research Matters.” Here is a map of the uninsurance reductions:

With the exceptions of states like Massachusetts that have already high levels of Medicaid expansion, it’s clear which states have chosen to expand Medicaid and which ones have not, but if you need the context, here is a map of states that have expanded Medicaid:

Continue reading