Dataset Information

Impact of Recent Medicaid Expansions on Office-Based Primary Care and Specialty Care among the Newly Eligible.

ABSTRACT: OBJECTIVE:To quantify the effect of Medicaid expansions on office-based care among the newly eligible. DATA SOURCE:2008-2014 Medical Expenditure Panel Survey. STUDY DESIGN:The main sample is adults age 26-64 with incomes ≤138% of poverty who were not eligible for Medicaid prior to the Affordable Care Act. For this population, difference-in-differences linear probability models compare utilization between expansion and nonexpansion states and between 2008-2013 and 2014. EXTRACTION METHODS:Medicaid eligibility is simulated using data on family relationships, state of residence, and income. PRINCIPAL FINDINGS:Relative to comparable adults in nonexpansion states, newly eligible adults in expansion states were 9.1 percentage points more likely to have any office-based primary care physician visit in 2014, a 21.4% increase from 2013 (p-value = .004); 6.9 percentage points more likely to have a specialist visit, a 25.2% increase from 2013 (p-value = .036); and 5.1 percentage points more likely to have a visit with a nurse practitioner, nurse, or physician assistant, a 34.5% increase from 2013 (p-value = .016). CONCLUSIONS:State Medicaid expansions in 2014 were associated with greater likelihoods of visits with a variety of office-based providers. The estimated effects are larger among newly eligible compared with previous estimates on broader populations of low-income adults.

SUBMITTER: Biener AI

PROVIDER: S-EPMC6051968 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature

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Impact of Recent Medicaid Expansions on Office-Based Primary Care and Specialty Care among the Newly Eligible.

Biener Adam I AI Zuvekas Samuel H SH Hill Steven C SC

Health services research 20171020 4

<h4>Objective</h4>To quantify the effect of Medicaid expansions on office-based care among the newly eligible.<h4>Data source</h4>2008-2014 Medical Expenditure Panel Survey.<h4>Study design</h4>The main sample is adults age 26-64 with incomes ≤138% of poverty who were not eligible for Medicaid prior to the Affordable Care Act. For this population, difference-in-differences linear probability models compare utilization between expansion and nonexpansion states and between 2008-2013 and 2014.<h4>E ...[more]

PMID: 29053183

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Project description:ObjectiveTo estimate the effects of Affordable Care Act (ACA) Medicaid expansion on insurance and health services use for adults with disabilities who were newly eligible for Medicaid.Data sources2008-2018 Medical Expenditure Panel Survey data.Study designWe used the Agency for Healthcare Research and Quality (AHRQ) PUBSIM model to identify adults aged 26-64 years with disabilities who were newly Medicaid-eligible in expansion states or would have been eligible in non-expansion states had those states opted to expand. Outcomes included insurance coverage; access to care; receipt of primary care, outpatient specialty physician services, and preventive services; and out-of-pocket health care spending. To estimate the effects of Medicaid expansion, we used two-way fixed effects models and a triple differences framework to compare pre-post changes in each outcome in expansion and non-expansion states for adults with and without disabilities.Extraction methodsWe simulated Medicaid eligibility with the AHRQ PUBSIM model, which uses state-specific Medicaid rules and MEPS data on family relationships, state of residence, and income.Principal findingsAmong adults with disabilities who were newly eligible for Medicaid, Medicaid expansion was associated with significant increases in full-year Medicaid coverage (35.9 percentage points [pp], p < 0.001), receipt of primary care (15.5 pp, p < 0.01), and receipt of flu shots (19.2 pp, p < 0.01), and a significant decrease in out-of-pocket spending (-$457, p < 0.01). There were larger improvements for adults with disabilities compared to those without disabilities in full-year Medicaid coverage (11.0 pp, p < 0.01) and receipt of flu shots (18.0 pp, p < 0.05).ConclusionsMedicaid expansion was associated with improvements in full-year insurance coverage, receipt of primary and preventive care, and out-of-pocket spending for adults with disabilities who were newly eligible for Medicaid. For insurance coverage, preventive care, and some primary care measures, there were differentially larger improvements for adults with disabilities than for those without disabilities.

Project description:ObjectiveTo describe how access to primary and specialty care differs for Medicaid patients relative to commercially insured patients, and how these differences vary across rural and urban counties, using comprehensive claims data from Oregon.DesignCross-sectional study of risk-adjusted access rates for two types of primary care providers (physicians; nurse practitioners (NPs) and physician assistants (PAs)); four types of mental health providers (psychiatrists, psychologists, advanced practice NPs or PAs specializing in mental health care, behavioral specialists); and four physician specialties (obstetrics and gynecology, general surgery, gastroenterology, dermatology).Participants420,947 Medicaid and 638,980 commercially insured adults in Oregon, October 2014-September 2015.OutcomePresence of any visit with each provider type, risk-adjusted for sex, age, and health conditions.ResultsRelative to commercially insured individuals, Medicaid enrollees had lower rates of access to primary care physicians (- 11.82%; CI - 12.01 to - 11.63%) and to some specialists (e.g., obstetrics and gynecology, dermatology), but had equivalent or higher rates of access to NPs and PAs providing primary care (4.33%; CI 4.15 to 4.52%) and a variety of mental health providers (including psychiatrists, NPs and PAs, and other behavioral specialists). Across all providers, the largest gaps in Medicaid-commercial access rates were observed in rural counties. The Medicaid-commercial patient mix was evenly distributed across primary care physicians, suggesting that access for Medicaid patients was not limited to a small subset of primary care providers.ConclusionsThis cross-sectional study found lower rates of access to primary care physicians for Medicaid enrollees, but Medicaid-commercial differences in access rates were not present across all provider types and displayed substantial variability across counties. Policies that address rural-urban differences as well as Medicaid-commercial differences-such as expansions of telemedicine or changes in the workforce mix-may have the largest impact on improving access to care across a wide range of populations.

Dataset Information

Impact of Recent Medicaid Expansions on Office-Based Primary Care and Specialty Care among the Newly Eligible.

Publications

Impact of Recent Medicaid Expansions on Office-Based Primary Care and Specialty Care among the Newly Eligible.

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