Is Medicaid's Dental Coverage Gap Harming Adults? What the Research Says
"A new study reveals how non-emergency dental benefits impact access and affordability for low-income adults."
For many adults enrolled in Medicaid, access to dental care beyond emergency services is far from guaranteed. While some states offer comprehensive benefits, others provide limited or no coverage for non-emergency procedures like cleanings, fillings, and dentures. This patchwork system raises critical questions about fairness, health equity, and the long-term consequences of neglecting oral health needs for a significant portion of the population.
Recognizing this disparity, researchers have investigated the impact of Medicaid adult dental benefits on actual dental service utilization and expenditures. By analyzing data from thousands of Medicaid enrollees across different states, these studies shed light on whether coverage expansions translate to improved access, increased preventive care, and reduced financial burdens for low-income individuals. These are the questions our research addresses, exploring the nuances and consequences of a fragmented system.
This article will synthesize findings from a key study on Medicaid dental coverage, focusing on how non-emergency benefits affect service use, costs, and access to preventive care. By understanding these dynamics, individuals, healthcare advocates, and policymakers can work towards informed decisions about Medicaid benefits and strategies for improving dental health equity.
Coverage and Use of Adult Dental Care
States choose whether to provide Medicaid dental benefits for adults, and the 2023 Medicaid & CHIP Oral Health at a Glance points to NASHP’s state coverage information, updated October 20, 2022. The ADA reports that adult Medicaid beneficiaries use dental care more in states with enhanced benefits than in states with limited or emergency-only benefits. CareQuest summarizes research linking dental coverage with greater access to regular dental care and, in turn, improved health outcomes, fewer emergency department visits, and greater workforce productivity.
Access Depends on More Than Coverage
MACPAC reports that, compared with privately insured people, adult Medicaid enrollees are less likely to have had a dental exam and more likely to delay care or go without needed care because of cost. The federal workgroup identifies benefit scope, out-of-pocket costs, provider availability, and beneficiary awareness as factors shaping low-income adults’ access to and use of recommended dental care. The ADA’s Health Policy Institute examines state benefits alongside dentist participation, utilization, and reimbursement rates, illustrating the range of factors relevant to assessing access.
A State Choice for Adult Benefits
Medicaid requires states to provide dental benefits to children enrolled in Medicaid and CHIP, but adult dental benefits are a state choice. The Medicaid fact sheet also points readers to a 2010 Medicaid/CHIP Oral Health Services fact sheet concerning children’s access and opportunities. A Center for Health Care Strategies overview describes state adult-benefit approaches and the access challenges low-income adults face.
Medicaid Dental Benefits: A State-by-State Disparity
The landscape of Medicaid dental coverage for adults is far from uniform. While all states offer some level of emergency dental services, the inclusion of non-emergency benefits—such as routine check-ups, fillings, and dentures—varies significantly. This creates a divide, impacting access to care and oral health outcomes for millions of low-income adults. Researchers highlight that factors, such as policy decisions, budget constraints, and differing priorities contribute to this state-by-state variation.
- Increased Dental Visits: Enrollees in states with non-emergency dental coverage were approximately 9 percentage points more likely to have a dental visit.
- Preventive Care Boost: These enrollees were also about 7 percentage points more likely to receive any preventive dental service.
- Reduced Out-of-Pocket Costs: For those who had any dental visit, the out-of-pocket share of dental expenditures was significantly lower in covered states, by approximately 19 percentage points.
Evidence on Policy Effects Remains Incomplete
A 2023 review titled “Synthesizing 30-years of adult medicaid dental policy” says that, despite Medicaid’s importance to low-income adults’ oral health, the extent to which variation in state dental policy influences outcomes is unknown; the review aims to synthesize existing evidence and motivate further research. A separate scoping review reports that adults were the second most common age group targeted by dental-care programs, with 11 programs, including programs for Medicaid adults. Research cited in a study of Medicaid pregnancy dental benefits has also reported reduced out-of-pocket dental spending and fewer emergency department visits for oral conditions, as well as a dentist supply response, but the supplied excerpt does not give estimates for those effects.
Adult Benefits Are Not Guaranteed
Federal law makes Medicaid dental benefits for adults optional, leaving states to decide whether to offer them, according to ScienceInsights. CareQuest likewise describes adult dental coverage as available to only some Medicaid adults and says many states provide limited or emergency-only care. These arrangements can leave adults without the dental services they need to maintain overall health.
State Coverage Tiers Vary
A 2026 state-by-state guide from CoveredUSA reports that 33 states cover comprehensive adult dental care, seven provide emergency-only coverage, nine offer limited care, and Alabama covers none. Other listed guides describe state benefits as ranging from routine care to emergency-only or no coverage, but the supplied excerpts do not provide figures to verify CoveredUSA’s specific counts. The coverage categories therefore illustrate variation across states, while the exact distribution here is the figure reported by CoveredUSA.
Policy Implications and The Path Forward
The research underscores that expanding Medicaid dental benefits can lead to tangible improvements in access to care and affordability for low-income adults. However, it also highlights that coverage alone is not enough to solve the problem of dental health inequities. To truly bridge the gap, a multi-pronged approach is needed.
Coverage Expansion and Oral Health
A study published in 2021 found that the combination of Medicaid expansion and Medicaid dental-benefit coverage was associated with improved oral health among low-income adults. The reported finding concerns the combination of expansion and dental benefits, rather than establishing the effect of either change alone. CareQuest’s case studies follow five states’ policy journeys from emergency-only to comprehensive adult dental benefits and describe challenges, strategies, and successes, including lessons for advocates seeking to improve access for low-income families, people with disabilities, and rural residents.
Policymakers should consider strategies to address the following to bolster oral health across the board: <ul><li><b>Increase Provider Participation:</b> Enhance Medicaid reimbursement rates to encourage more dentists to participate in the program.</li><li><b>Expand Preventive Programs:</b> Invest in community-based dental programs and oral health education initiatives.</li><li><b>Address Social Determinants:</b> Tackle transportation barriers and other systemic issues that prevent people from accessing care.</li></ul>
By taking these steps, states can move closer to ensuring that all adults, regardless of income, have the opportunity to achieve and maintain good oral health.