Concentration in Health Insurance Markets
This interactive chart provides details on 1) enrollment in the overall individual market and the individual exchanges as measured by covered life-years, and 2) covered life-years in each state's individual exchange as a proportion of covered life-years in the overall individual market from 2015 through 2022.
Wisconsin
Source: GAO analysis of data from the Centers for Medicare & Medicaid Services (CMS). | GAO-25-107194
The table below displays data for the selected state. Click here to download the data used in this graphic.
| State | Year | Covered life-years, individual exchange | Covered life-years, individual market | Individual exchange covered life-years as a proportion of overall individual market (%) |
|---|---|---|---|---|
| Wisconsin | 2015 | 168,501 | 316,855 | 53 |
| Wisconsin | 2016 | 205,969 | 328,052 | 63 |
| Wisconsin | 2017 | 200,000 | 294,829 | 68 |
| Wisconsin | 2018 | 185,430 | 259,804 | 71 |
| Wisconsin | 2019 | 177,189 | 243,622 | 73 |
| Wisconsin | 2020 | 175,219 | 235,764 | 74 |
| Wisconsin | 2021 | 180,021 | 235,220 | 77 |
| Wisconsin | 2022 | 196,771 | 249,652 | 79 |
- We calculated the size of each market from 2015 through 2022 using covered life-years that issuers reported to Centers for Medicare & Medicaid Services or states. This measure is calculated as the average number of lives insured each month in the reporting year. Rather than a point-in-time measurement, this measure accounts for changes in enrollment that occur throughout the year.
- Covered life-years is one of several ways to measure health insurance enrollment, so it may differ from other measures of market size.
- We rounded market share values of less than 0.5 percent to zero.