Why a Proposed 2027 ACA Rule Could Keep Adult Dental Care Out of Marketplace Plans

Adults shopping for Affordable Care Act Marketplace coverage should not assume dental care is included. That is true now, and a new federal proposal could keep it that way.

In February 2026, the Centers for Medicare & Medicaid Services proposed a rule for the 2027 plan year that would again prohibit insurers from treating routine adult dental services as an essential health benefit. In plain English, that would shut down a pathway created in a 2025 federal rule that had allowed states to try to add routine adult dental care to their benchmark coverage standards starting in 2027.

As of April 16, 2026, this is still a proposed rule, not a final one. But it matters because adult dental coverage is still not guaranteed in Marketplace health plans, and many people already have to piece it together through a separate dental policy or go without routine coverage.

What CMS is proposing

Under the 2027 proposed payment rule, CMS says insurers should not be allowed to include routine non-pediatric, meaning adult, dental services as an essential health benefit. The agency says reversing the 2025 policy would better match the Affordable Care Act’s requirement that essential health benefits be similar in scope to benefits in a typical employer plan.

Essential health benefits are the categories of care that ACA-compliant individual and small-group plans must cover. Whether a service can be treated as an essential health benefit affects how coverage can be built into benchmark plans, which in turn can shape plan design, consumer protections, and whether coverage feels like one integrated benefit or a separate add-on.

What changed in 2025

The reason this proposal is getting attention is that CMS moved in the opposite direction just two years ago. In the 2025 final payment rule, the agency removed an older federal prohibition that had blocked routine adult dental services from being treated as an essential health benefit.

That 2025 change did not automatically add adult dental coverage nationwide. Instead, it created a pathway for states to update their essential health benefit benchmark plans through the application process, with changes first able to take effect for benefit years beginning on or after January 1, 2027.

That distinction matters. The 2025 rule opened a door. The 2026 proposal would close it before states could broadly use that new option.

What adult dental coverage looks like today

For most adults, the current consumer reality is simple: Marketplace medical plans do not have to include dental care. HealthCare.gov says adult dental coverage is not an essential health benefit, which means insurers are not required to offer it as part of a health plan.

Some adults can get dental benefits embedded in a Marketplace health plan. Others have to buy a separate dental plan. And separate plans may come with their own monthly premium, their own network, and sometimes a waiting period before certain services are covered.

That can make coverage harder to compare and easier to misunderstand. A shopper may choose a health plan thinking basic dental care is part of the package, only to find out later that cleanings, fillings, or other routine services require a separate plan or are not covered the way they expected.

Why essential health benefit status matters

This policy question can sound technical, but the practical issue is straightforward. If routine adult dental care can be part of a state’s essential health benefit benchmark, states have more room to treat dental care as part of core coverage instead of leaving it mostly optional or separate.

That could affect affordability, not necessarily by guaranteeing lower premiums, but by changing how benefits are structured and how fragmented coverage feels. When dental care sits outside the core benefit package, people may face extra premiums, separate deductibles, waiting periods, or the hassle of managing two sets of benefits.

For people already on tight budgets, that extra friction can be enough to delay or skip care.

Who could feel the impact most

The people most likely to notice this policy are adults who already face the biggest barriers to dental care. The CDC says about 57 million Americans live in dental health professional shortage areas, and many of those areas are rural. The agency also notes that traditional Medicare does not cover routine dental care, which can leave many older adults losing employer-sponsored dental benefits when they retire.

Adults with lower incomes may be especially exposed to coverage gaps. Even when they have some form of insurance, dental benefits can be limited, hard to find in-network, or unavailable locally. People in shortage areas may have a dental benefit on paper but still struggle to get an appointment within a reasonable distance.

That means the stakes are not only about insurance rules. They are also about whether people can turn coverage into actual care.

Coverage alone does not guarantee access

That last point is important. Better benefit design can help, but it does not solve every access problem.

A 2025 study in JAMA Health Forum explored why dentists do or do not participate in Medicaid. It was a qualitative study based on interviews with 67 dentists across eight states, so it was designed to surface experiences and themes rather than measure national cause and effect. Dentists in the study repeatedly pointed to low reimbursement, administrative burden, restrictive benefit design, and missed appointments as barriers to participation.

The study was focused on Medicaid, not Marketplace plans, so it cannot tell us exactly what would happen if adult dental benefits were expanded through ACA benchmark rules. Still, it offers a useful reminder: having a covered benefit is not the same as having a robust network or an easy path to care.

What critics of the proposal are saying

Dental organizations are urging CMS not to finalize the reversal. ADA News reported that an organized dentistry coalition told the agency the proposal would undo the 2025 policy change and increase fragmentation in coverage. Those groups argue that keeping adult dental outside the essential benefit framework makes coverage less coordinated and less accountable.

That is a stakeholder position, not proof by itself that the policy will harm consumers. But it does help explain why dental groups see this as more than a technical regulatory cleanup. They see it as a decision that could shape whether adult oral health is treated as part of mainstream health coverage or as a side benefit people have to bolt on separately.

What this means for readers

If you buy your own health insurance, the safest assumption is still that adult dental care may not be included unless you confirm it yourself. Check whether the plan includes dental benefits, whether dental is sold separately, whether a waiting period applies, and which dentists are in network.

It is also worth watching whether CMS finalizes this rule. If the proposal goes through, a newer federal pathway that could have allowed states to fold routine adult dental care into essential Marketplace coverage starting in 2027 would be blocked. If it does not go through, states could still have that option.

Do not assume your Marketplace health plan includes adult dental care.
Look for separate dental premiums, waiting periods, and provider network details before enrolling.
If you are retiring or losing employer coverage, remember that traditional Medicare generally does not cover routine dental care.
Even with coverage, access may still depend on dentist participation and local provider availability.

The bottom line is that this is still a live policy question, not a settled one. But for adults trying to budget for cleanings, fillings, dentures, or other routine care, the outcome could shape whether dental coverage remains mostly separate and optional in the Marketplace or becomes easier for states to build into core coverage in the future.

Sources

This article is for general informational purposes only and is not medical advice. Research findings can be early, limited, or subject to change as new evidence emerges. For personal guidance, diagnosis, or treatment, consult a licensed clinician. For current outbreak or public health guidance, follow your local health department, the CDC, or another relevant public health authority.