Obamacare year one in review

How the Affordable Care Act affected uninsured rates in your state

Oct. 1, 2013, was a big day for the Affordable Care Act.

Although filled with now-infamous "glitches," the opening of the law's first open enrollment period transformed states' insurance markets and launched the coverage expansion phase of the health reform law. From October to March, millions of Americans signed up for private insurance coverage or enrolled in Medicaid.

As we prepare for the second year of open enrollment, the Daily Briefing takes a look back at how the first year played out in each state.

This interactive offers a state-by-state look at how uninsured rates, Medicaid enrollment, and private insurance coverage changed from pre-open enrollment to summer 2014. (Get a breakdown of the data sources below.)

Filter the map by:

To create this interactive, Daily Briefing editor Juliette Mullin, writer Emily Hatton, and multimedia manager Jesse Schoch pulled data from various sources.

Uninsured rates

For the states' uninsured rates, we used data from the Gallup-Healthways Well Being Index Survey. The 2013 uninsured data was collected via a random sample of 178,068 adults from all 50 states and the District of Columbia from Jan. 2 to Dec. 29. The "mid-point 2014" uninsured rates were taken from Gallup's interviews with 88,678 adtuls from Jan. 2 to June 30.

It is important to note that the margin of error for the 2013 Gallup data was +/- 1 to +/- 2 percentage points. For states with small population sizes, the margin of error may be as high as +/- 3.5 percentage points, according to Gallup. For the 2014 uninsured data, the margin of error was as high as +/- 5 percentage points for states with smaller populations.

Medicaid enrollment

We identified stats' Medicaid expansion decisions using the Advisory Board's Medicaid map, which has been tracking the issue since 2012.

The data on Medicaid enrollment came from a CMS report on Medicaid enrollment from July 2014.

Exchange plan selection

We used an HHS summary report on exchange enrollment from May to determine the number of private insurance plans selected through the insurance exchanges and to identify the type of insurance exchange operated in each state.

Source list

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