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.
Mississippi
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 (%) |
|---|---|---|---|---|
| Mississippi | 2015 | 65,217 | 168,745 | 39 |
| Mississippi | 2016 | 64,587 | 137,801 | 47 |
| Mississippi | 2017 | 60,701 | 121,246 | 50 |
| Mississippi | 2018 | 65,363 | 117,224 | 56 |
| Mississippi | 2019 | 73,739 | 119,788 | 62 |
| Mississippi | 2020 | 86,086 | 127,738 | 67 |
| Mississippi | 2021 | 101,688 | 140,248 | 73 |
| Mississippi | 2022 | 126,582 | 161,661 | 78 |
- 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.