Does preventive dental care reduce nonpreventive dental visits and expenditures among Medicaid-enrolled adults?

OBJECTIVE: To determine whether preventive dental visits are associated with fewer subsequent nonpreventive dental visits and lower dental expenditures. DATA SOURCES: Indiana Medicaid enrollment and claims data (2015-2018) and the Area Health Resource File. STUDY DESIGN: A repeated measures design with individual and year fixed effects examining the relationship between preventive dental visits (PDVs) and nonpreventive dental visits (NPVs) and dental expenditures. DATA COLLECTION/EXTRACTION METHODS: Not applicable. PRINCIPAL FINDINGS: Of 28,152 adults (108,349 observation-years) meeting inclusion criteria, 36.0% had a dental visit, 27.8% a PDV, and 22.1% a NPV. Compared to no PDV in the prior year, at least one was associated with fewer NPVs (ß = -0.13; 95% CI -0.12, -0.11), lower NPV expenditures (ß = -$29.12.53; 95% CI -28.07, -21.05), and lower total dental expenditures (-$70.12; 95% -74.92, -65.31), as well as fewer PDVs (ß = -0.24; 95% CI -0.26, -0.23). CONCLUSIONS: Our findings suggest that prior year PDVs are associated with fewer subsequent NPVs and lower dental expenditures among Medicaid-enrolled adults. Thus, from a public insurance program standpoint, supporting preventive dental care use may translate into improved population oral health outcomes and lower dental costs among certain low-income adult populations, but barriers to consistent utilization of PDV prohibit definitive findings.

Medicaid healthy behavior incentives and use of dental services.

OBJECTIVE: To examine changes in access to dental care in states using Section 1115 waivers to implement healthy behavior incentive (HBI) programs in their Medicaid expansion under the ACA, compared to traditional expansion states and nonexpansion states. DATA SOURCES: Behavioral Risk Factor Surveillance System from 2008 to 2018. STUDY DESIGN: We used difference-in-differences analysis to compare changes in three Medicaid expansion states with HBI (Iowa, Indiana, Michigan) to traditional expansion (Minnesota, North Dakota, Ohio) and nonexpansion states (Nebraska, South Dakota, Wyoming) in the same mid-Western region of the country. The sample included 32 556 low-income adults. DATA COLLECTION/EXTRACTION METHODS: NA. PRINCIPAL FINDINGS: We found no significant changes in dental visits associated with HBI or traditional expansion relative to nonexpansion states. HBI expansion was associated with an increase of 2.2 percentage points in reporting a dental visit in the past year for adults in urban areas (P < 0.05) while the traditional expansion was associated with a reduction of 8.5 percentage points (P < 0.01) in utilization in rural areas relative to nonexpansion states. However, after adjustment for preexisting trends, the coefficients were no longer significant, suggesting that these differences are likely due to preexisting trends. CONCLUSIONS: We did not find evidence of increased utilization of routine dental care associated with HBI programs.

Changes in emergency department dental visits after Medicaid expansion.

OBJECTIVES: To estimate the effect of Medicaid expansion under the Affordable Care Act (ACA) on the frequency and payment source for Emergency Department (ED) visits for dental care. STUDY DESIGN: Retrospective, quasi-experimental study. DATA SOURCES/STUDY SETTING: We used the State Emergency Department Database to compare changes in ED visit rates and payment source for dental conditions among patients from 33 states. These states represent four distinct policy environments, based on whether they expanded Medicaid and whether their Medicaid programs provide dental benefits. We first assessed the number of ED dental visits before (2012) and after (2014) the ACA. Then, we used differences-in-differences regression to estimate changes in insurance for dental visits by nonelderly adults. PRINCIPAL FINDINGS: Our sample contained 375 944 dental ED visits. In states that expanded Medicaid and offered dental coverage, dental ED visits decreased by 14.1 percent (from 19 443 to 16 709, for a net difference of 2734). By contrast, in the remaining three state groups, dental ED visits rose. Meanwhile, the expansion significantly increased Medicaid coverage and decreased the rate of self-pay for ED dental visits. CONCLUSIONS: Medicaid expansion, combined with adult dental coverage in Medicaid, was associated with a reduction in ED utilization for dental visits.