3 largest health insurers held 80% of market in 2015-16, GAO says
Becker's Healthcare March 22, 2019
The three largest private health insurers held 80 percent or more of the employer and individual market in 2015-16, according to a Government Accountability Office analysis.
The GAO used enrollment data from 2015-16 that health insurers reported to CMS, and compared the data to 2011-14 enrollment figures. Some data sets...