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 Carolina
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 Carolina | 2015 | 415,605 | 729,865 | 57 |
| North Carolina | 2016 | 462,769 | 694,144 | 67 |
| North Carolina | 2017 | 430,891 | 604,138 | 71 |
| North Carolina | 2018 | 428,012 | 539,601 | 79 |
| North Carolina | 2019 | 424,781 | 517,975 | 82 |
| North Carolina | 2020 | 449,264 | 537,400 | 84 |
| North Carolina | 2021 | 521,534 | 603,022 | 86 |
| North Carolina | 2022 | 627,789 | 704,911 | 89 |
- 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.