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.
Oklahoma
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 (%) |
|---|---|---|---|---|
| Oklahoma | 2015 | 95,740 | 192,458 | 50 |
| Oklahoma | 2016 | 119,184 | 188,696 | 63 |
| Oklahoma | 2017 | 116,140 | 156,081 | 74 |
| Oklahoma | 2018 | 125,303 | 153,387 | 82 |
| Oklahoma | 2019 | 136,791 | 160,480 | 85 |
| Oklahoma | 2020 | 142,226 | 162,980 | 87 |
| Oklahoma | 2021 | 165,534 | 179,351 | 92 |
| Oklahoma | 2022 | 171,315 | 187,782 | 91 |
- 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.