Dental and Vision Insurance Markets Show Significant State-by-State Concentration

A new report from the U.S. Government Accountability Office (GAO) reveals that the private dental and vision insurance markets exhibit considerable variation in concentration across different states, a situation that could impact consumer choice and competition. The study, which analyzed 2024 enrollment data, found that in many states, a small number of insurance companies hold a substantial portion of the market share in both group and individual plans. This level of concentration, similar to what has been observed in health insurance markets, raises questions about the competitive landscape for consumers seeking these specific types of coverage.

The GAO’s analysis, based on data from the National Association of Insurance Commissioners (NAIC), indicated that the combined market share of the top three largest insurers in any given state ranged from approximately 38% to as high as 98% for the dental group market. For the vision group market, this range was similarly broad, from about 41% to 96%. The median market share for the top three insurers in the dental group market was 66.8%, while in the vision group market, it was 77.4%. The number of insurers operating within each state also varied, with a median of 39 dental insurers and 28 vision insurers per state.

Beyond market concentration, the GAO also examined the concept of vertical integration, which occurs when an insurance company expands its business to include other parts of the supply chain, such as owning provider practices or manufacturing eyewear. While the GAO did not find comprehensive data on the extent of vertical integration in these markets, stakeholders from the dental industry reported that it is currently limited, with only recent developments in this area. Conversely, some stakeholders in the vision industry indicated that vertical integration is more prevalent, with insurers owning ophthalmologist practices, lens and frame manufacturers, and even retail eyewear brands.

The report also highlighted a scarcity of research detailing the specific effects of market concentration and vertical integration within the private dental and vision insurance sectors. Existing studies on dental insurance markets suggest a link between higher market concentration and reduced reimbursement rates for dental services paid by insurers to providers. Stakeholders interviewed by the GAO also shared anecdotal observations, noting that concentrated markets can limit the ability of providers to negotiate contracts and reimbursement terms with insurers. However, due to the limited instances of vertical integration in the dental insurance market, some dental industry representatives indicated a lack of sufficient opportunity to evaluate its effects.

Approximately one in four Americans carried stand-alone dental or vision insurance in 2024, underscoring the importance of understanding the dynamics of these markets. The findings suggest that individuals seeking dental or vision coverage may encounter varying levels of competition depending on their state of residence. Consumers looking for these types of insurance should be aware that in some states, their choices might be limited to a few dominant providers.

Article by Mel Anara, based upon information from the U.S. Government Accountability Office

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