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.
North Dakota
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 (%) |
|---|---|---|---|---|
| North Dakota | 2015 | 15,509 | 55,255 | 28 |
| North Dakota | 2016 | 18,526 | 51,669 | 36 |
| North Dakota | 2017 | 18,865 | 49,580 | 38 |
| North Dakota | 2018 | 19,412 | 45,819 | 42 |
| North Dakota | 2019 | 19,657 | 43,246 | 45 |
| North Dakota | 2020 | 19,770 | 42,246 | 47 |
| North Dakota | 2021 | 23,158 | 44,496 | 52 |
| North Dakota | 2022 | 29,179 | 47,309 | 62 |
- 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.