The Centers for Medicare & Medicaid Services finalized several Marketplace policy changes affecting dental coverage in the 2027 Notice of Benefit and Payment Parameters Final Rule. Most notably, the agency reinstated the prohibition on routine adult dental services being treated as an essential health benefit in Marketplace Exchange plans. 

The decision reverses a 2024 policy that had allowed states to include adult dental benefits in their essential health benefit benchmark plans beginning in 2027. CMS said the change better reflects the Affordable Care Act’s statutory framework, which explicitly includes pediatric — but not adult — oral health services. 

When the ACA was enacted in 2010, it established a core set of essential health benefits for individual and small-group Marketplace exchange plans. While pediatric dental care was included, adult dental services were largely excluded, reflecting longstanding separation between medical and dental coverage. 

In the final rule, CMS said its interpretation aligns with both the statute and market norms. The agency noted that routine adult dental services are not typically covered in employer-sponsored major medical plans and warned that embedding them as an EHB could create “illusory” benefits due to differences in plan design. 

CMS also raised concerns about disruption to the stand-alone dental plan market. The agency said allowing adult dental benefits as an essential health benefit could reduce demand for stand-alone dental plans and destabilize a market structure that currently serves millions of enrollees. 

The Organized Dentistry Coalition, which includes the ADA, opposed the policy change. In a March comment letter, the group argued that CMS’s rationale does not reflect current market realities or the evolution of dental coverage since the ACA’s passage. 

The coalition noted that qualified health plans in 36 states already embed adult dental benefits and pointed to Medicare Advantage plans as evidence that insurers have the infrastructure to administer dental coverage. It also rejected the idea that stand-alone dental plans indicate congressional intent to exclude adult oral health services. 

“Continued prohibition of non-pediatric dental services as an essential health benefit no longer serves its original purpose,” the coalition wrote, warning that the policy could undermine access to care and run counter to expanding coverage trends. 

Beyond essential health benefit policy, CMS declined to finalize a proposal to reduce essential community provider participation thresholds from 35% to 20%. The proposal had drawn significant opposition from provider groups concerned about maintaining access to safety-net providers, including federally qualified health centers. 

CMS said it was persuaded by comments warning that lowering the threshold could disproportionately affect underserved populations. The agency emphasized the continued importance of ensuring access to providers who serve low-income and vulnerable communities. 

The final rule also leaves medical loss ratio standards and reporting requirements unchanged. While CMS had proposed reducing reporting burdens, the Organized Dentistry Coalition opposed the change, arguing that medical loss ratio transparency is critical to ensuring plans invest in patient care and calling for similar requirements for stand-alone dental plans. 

Overall, the final rule reflects a mix of policy reversal on adult dental coverage and responsiveness to stakeholder concerns about access and market stability.