2023 U.S. Commercial Health Insurance Market Concentration and Competitiveness Trends
This analysis provides a comprehensive overview of market competition trends among U.S. commercial health insurers from 2013 to 2023, focusing on fully insured large group, small group, and individual insurance markets. It uses enrollment data from Mark Farrah Associates and employs three key metrics to assess market concentration: the market share of the largest insurer, the number of insurers with at least 5% market share, and the Herfindahl-Hirschman Index (HHI). The findings reveal a persistent high level of market concentration across all segments, with notable shifts since 2020.