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.
Missouri
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 (%) |
|---|---|---|---|---|
| Missouri | 2015 | 193,516 | 442,728 | 44 |
| Missouri | 2016 | 222,785 | 413,686 | 54 |
| Missouri | 2017 | 198,606 | 308,405 | 64 |
| Missouri | 2018 | 196,991 | 264,509 | 74 |
| Missouri | 2019 | 177,674 | 227,062 | 78 |
| Missouri | 2020 | 181,558 | 225,011 | 81 |
| Missouri | 2021 | 207,910 | 246,559 | 84 |
| Missouri | 2022 | 217,101 | 249,619 | 87 |
- 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.