Effect of expansions in state Medicaid eligibility on access to care and the use of emergency department services for adult Medicaid enrollees

Trends and Patterns in Emergency Department Visits: A Comprehensive Analysis of Adult Data From the National Center for Health Statistics (NCHS) Database

Background Emergency department (ED) visits among adults have increased in recent years, with the United States reporting 140 million ED visits in 2021, equating to an overall rate of 43 visits per 100 people. This trend underscores challenges in accessing primary care and addressing underlying health conditions. Understanding the trends and patterns in ED utilization is essential for informing healthcare policy and practice. Objective This study aims to comprehensively analyze trends and patterns in ED visits among adults using data from the National Center for Health Statistics (NCHS) database. Methods We conducted a retrospective analysis of ED visit data from 1999 to 2019, focusing on adults aged 18 and over. The prevalence rates of ED visits were examined across demographic, socioeconomic, and geographic groups using datasets retrieved from the NCHS database. Statistical analysis included one-way ANOVA and chi-square tests to assess variations in ED visit rates. Results This study's findings revealed a consistent increase in overall ED visits among adults, from 17.2 ± 0.3% in 1999 to 21.7 ± 0.3% in 2019. Disparities in ED utilization were evident across demographic and socioeconomic groups. Females had slightly higher visit rates, and significant racial disparities were noted, with American Indian or Alaska Native and Black or African American individuals showing the highest visit rates. Age-specific variations were observed, with young adults (18-24 years) and older adults (65 years and above) exhibiting higher visit rates. Socioeconomic status and health insurance coverage emerged as significant determinants, highlighting disparities in healthcare access. Conclusion This study provides valuable insights into the trends and patterns of ED visits among adults, emphasizing the need for targeted interventions to address healthcare disparities and improve access to primary care services.

Medicaid Expansion and Preventable Emergency Department Use by Race/Ethnicity

INTRODUCTION

This study aimed to examine changes in emergency department (ED) visits for ambulatory care sensitive conditions (ACSCs) among uninsured or Medicaid-covered Black, Hispanic, and White adults aged 26-64 in the first 5 years of the Affordable Care Act Medicaid expansion.

METHODS

Using 2010-2018 inpatient and ED discharge data from nine expansion and five nonexpansion states, an event study difference-in-differences regression model was used to estimate changes in number of annual ACSC ED visits per 100 adults ("ACSC ED rate") associated with the 2014 Medicaid expansion, overall and by race/ethnicity. A secondary outcome was the proportion of ACSC ED visits out of all ED visits ("ACSC ED share"). Analyses were conducted in 2022-2023.

RESULTS

Medicaid expansion was associated with no change in ACSC ED rates among all, Black, Hispanic, or White adults. When excluding California, where most counties expanded Medicaid before 2014, expansion was associated with a decrease in ACSC ED rate among all, Black, Hispanic, and White adults. Expansion was also associated with a decrease in ACSC ED share among all, Black, and White adults. White adults experienced the largest reductions in ACSC ED rate and share.

CONCLUSIONS

Medicaid expansion was associated with reductions in ACSC ED rates in some expansion states and reductions in ACSC ED share in all expansion states combined, with some heterogeneity by race/ethnicity. Expansion should be coupled with policy efforts to better link newly insured Black and Hispanic patients to non-ED outpatient care, alongside targeted outreach and expanded primary care capacity, which may reduce disparities in ACSC ED visits.

Changes in emergency department use associated with Medicaid expansion under the Affordable Care Act: A comparison of waiver and traditional expansion states

Objective

To determine whether changes in emergency department use associated with Medicaid expansions differed between states undergoing waiver and traditional expansions.

Methods

Design: This study was a cross-sectional difference-in-difference and event studies of Medicaid Expansion among states that expanded during or after 2014. Setting: We used a nationally representative cross-sectional survey from all 50 United States and the District of Columbia from 2010 to 2016. Participants: Adults aged 19-65 years with incomes <138% of the federal poverty level were included. Main Outcomes and Measures: Main outcomes were self-reported emergency department (ED) utilization in the last 12 months.

Results

Individuals in states across all expansion types were not more likely to report any ED use in the previous year (2.8 percentage point increase [0.0-5.5], P = 0.052) but were more likely to report visiting an ED 2 times or more in the previous year (2.0 [0.0-4.1], P = 0.049) than those in non-expansion states. Individuals in states undergoing traditional expansions likewise were not more likely to report any ED use (2.2 [-0.7 to 1.5], P = 0.136) but were more likely to report visiting an ED 2 times or more in the previous year (2.3 [0.1-4.4], P = 0.038). Conversely, individuals in waiver states were more likely to report increase in any ED use (5.6 [0.3-11.0], P = 0.038), but were not more likely to report use of EDs 2 times or more in the previous year (0.8 [-3.2-4.9], P = 0.688). The differences between traditional and waiver states in any ED use and ED use 2 times or more in the previous 12 months were not statistically significant (P = 0.215 and P = 0.501, respectively).

Conclusions

Three years after expanding Medicaid under the Affordable Care Act, there is little evidence of differences between traditional and waiver expansion states in changes in any ED use or intensive ED use. Future studies should investigate longer term changes in ED use.

Disparities in Health Care Spending and Utilization Among Black and White Medicaid Enrollees

Importance

Administrative records indicate that more than half of the 80 million Medicaid enrollees identify as belonging to a racial and ethnic minority group. Despite this, disparities within the Medicaid program remain understudied. For example, we know of no studies examining racial differences in Medicaid spending, a potential measure of how equitably state resources are allocated.

Objectives

To examine whether and to what extent there are differences in health care spending and utilization between Black and White enrollees in Medicaid.

Design Setting and Participants

This cross-sectional study used calendar year 2016 administrative data from 3 state Medicaid programs and included 1 966 689 Black and White Medicaid enrollees. Analyses were performed between January 28, 2021, and October 18, 2021.

Exposures

Self-reported race.

Main Outcomes and Measures

Rates and racial differences in health care spending and utilization (including Healthcare Effectiveness Data and Information Set [HEDIS] access measures).

Results

Of 1 966 689 Medicaid adults and children (mean [SD] age, 20.3 [17.1] years; 1 119 136 [56.9%] female), 867 183 (44.1%) self-identified as non-Hispanic Black and 1 099 506 (55.9%) self-identified as non-Hispanic White. Results were adjusted for age, sex, Medicaid eligibility category, zip code, health status, and usual source of care. On average, annual spending on Black adult (19 years or older) Medicaid enrollees was $317 (95% CI, $259-$375) lower than White enrollees, a 6% difference. Among children (18 years or younger), annual spending on Black enrollees was $256 (14%) lower (95% CI, $222-$290). Adult Black enrollees also had 19.3 (95% CI, 16.78-21.84), or 4%, fewer primary care encounters per 100 enrollees per year compared with White enrollees. Among children, the differences in primary care utilization were larger: Black enrollees had 90.1 (95% CI, 88.2-91.8) fewer primary care encounters per 100 enrollees per year compared with White enrollees, a 23% difference. Black enrollees had lower utilization of most other services, including high-value prescription drugs, but higher emergency department use and rates of HEDIS preventive screenings.

Conclusions and Relevance

In this cross-sectional study of US Medicaid enrollees in 3 states, Black enrollees generated lower spending and used fewer services, including primary care and recommended care for acute and chronic conditions, but had substantially higher emergency department use. While Black enrollees had higher rates of HEDIS preventive screenings, ensuring equitable access to all services in Medicaid must remain a national priority.

Insurance instability and use of emergency and office-based care after gaining coverage: An observational cohort study

Background

The Affordable Care Act led to improvements in reporting a usual source of care, but it is unclear whether patients are changing their usual source of care in response to coverage gains. We assess whether prior insurance instability is associated with changes in use of emergency and office-based care after the Marketplace and Medicaid expansion were introduced.

Methods

Our study draws from the 2013–14 Medical Expenditure Panel Survey, identifying a cohort of non-elderly adults with full-year health insurance coverage in 2014. We use linear and multinomial logistic regression to assess the relationship between insurance instability prior to 2014 (uninsured for 1–11 months, ≥12 months) and person-level changes in use of health care after gaining coverage (change in ED and office visits from 2013 to 2014) with continuously insured individuals serving as a comparison group.

Results

Being uninsured for at least one year prior to gaining full-year coverage in 2014 was associated with a 33% increase in ED visits (0.06 visits, p<0.01) and a 47% increase in office visits (1.10 visits, p<0.01), driven by those gaining public coverage. We found no evidence of substitution across settings in the short term, often a stated goal of expansion.

Conclusion

The long-term uninsured may have substantial health needs and pent-up demand for health care, seeing more physicians across multiple settings in the year after gaining coverage as they seek to get unmanaged conditions under control. Closing the gap in primary care use between the previously uninsured and those with health insurance coverage may help improve long-term health outcomes.

Ohio's Medicaid Expansion and Unmet Health Needs Among Low-Income Women of Reproductive Age

Objective To examine changes in the prevalence and odds of unmet healthcare needs and healthcare utilization among low-income women of reproductive age (WRA) after Ohio's 2014, ACA-associated Medicaid expansion, which extended coverage to non-senior adults with a family income ≤ 138% of the federal poverty level. Methods We analyzed publically available data from the 2012 and 2015 Ohio Medicaid Assessment Survey (OMAS), a cross-sectional telephone survey of Ohio's non-institutionalized adult population. The study included 489 low-income women in 2012 and 1273 in 2015 aged 19-44 years who were newly eligible for Medicaid after expansion in January 2014. Four unmet healthcare need and three healthcare utilization measures were examined. We fit survey-weighted logistic regression models adjusted for race/ethnicity, working status, and educational attainment to determine whether the odds of each measure differed between 2012 and 2015. Results In 2015, low-income WRA had a significantly lower odds of reporting an unmet dental care need (ORadj = 0.72, 95% CI 0.54, 0.95), unmet vision care need (ORadj = 0.68, 95% CI 0.50, 0.93), unmet mental health need (ORadj = 0.57, 95% CI 0.39, 0.83), and unmet prescription need (ORadj = 0.39, 95% CI 0.45, 0.80) compared to 2012. There were no significant differences in the odds of seeing a doctor or dentist in the past year or of having a usual source of care for low-income WRA in 2012 and 2015. Conclusions for Practice After Ohio's 2014 Medicaid expansion the odds of low-income WRA having unmet healthcare needs was reduced. Future research should examine outcomes after a longer period of follow-up and include additional measures, such as self-rated health status.

Medicaid Expansion and Health Plan Quality in Medicaid Managed Care

OBJECTIVE

To assess the effect of the 2014 Medicaid expansion on Medicaid managed care plan quality.

DATA SOURCES

Three composite measures of plan-level quality constructed from the Health Care Effectiveness Data and Information Set.

STUDY SETTING

One hundred and sixty-three plans in 27 Medicaid expansion states and 100 plans in 14 nonexpansion states.

STUDY DESIGN

Quasi-experimental difference-in-differences (DID) analysis, comparing quality before (2011-13) and after (2014-15) Medicaid expansion in states that elected to expand Medicaid eligibility and those that did not.

PRINCIPAL FINDINGS

Mean plan enrollment increased from 130,533 to 274,259 in expansion states and from 105,449 to 148,194 in nonexpansion states. The proportion of enrollees receiving recommended preventive care increased from 62.6 to 65.2 percent in expansion states and from 59.3 to 62.5 percent in nonexpansion states (adjusted DID: -0.7 percentage points [95% CI -2.2, 0.7]). The proportion of enrollees receiving recommended chronic disease care management increased from 65.4 to 66.0 percent in expansion states and from 62.5 to 63.1 percent in nonexpansion states (adjusted DID: 1.1 percentage points [95% CI -0.5, 2.6]). We observed similar patterns for the receipt of recommended maternity care.

CONCLUSIONS

Medicaid expansion increased enrollment in managed care plans, but it did not result in erosion of quality.

Oregon's Emphasis On Equity Shows Signs Of Early Success For Black And American Indian Medicaid Enrollees

In 2012 Oregon transformed its Medicaid program, providing coverage through sixteen coordinated care organizations (CCOs). The state identified the elimination of health disparities as a priority for the CCOs, implementing a multipronged approach that included strategic planning, community health workers, and Regional Health Equity Coalitions. We used claims-based measures of utilization, access, and quality to assess baseline disparities and test for changes over time. Prior to the CCO intervention there were significant white-black and white-American Indian/Alaska Native disparities in utilization measures and white-black disparities in quality measures. The CCOs' transformation and implementation of health equity policies was associated with reductions in disparities in primary care visits and white-black differences in access to care, but no change in emergency department use, with higher visit rates persisting among black and American Indian/Alaska Native enrollees, compared to whites. States that encourage payers and systems to prioritize health equity could reduce racial and ethnic disparities for some measures in their Medicaid populations.

Mental Health and Drivers of Need in Emergent and Non-Emergent Emergency Department (ED) Use: Do Living Location and Non-Emergent Care Sources Matter?

Emergency department (ED) utilization has increased due to factors such as admissions for mental health conditions, including suicide and self-harm. We investigate direct and moderating influences on non-emergent ED utilization through the Behavioral Model of Health Services Use. Through logistic regression, we examined correlates of ED use via 2014 New York State Department of Health Statewide Planning and Research Cooperative System outpatient data. Consistent with the primary hypothesis, mental health admissions were associated with emergent use across models, with only a slight decrease in effect size in rural living locations. Concerning moderating effects, Spanish/Hispanic origin was associated with increased likelihood for emergent ED use in the rural living location model, and non-emergent ED use for the no non-emergent source model. 'Other' ethnic origin increased the likelihood of emergent ED use for rural living location and no non-emergent source models. The findings reveal 'need', including mental health admissions, as the largest driver for ED use. This may be due to mental healthcare access, or patients with mental health emergencies being transported via first responders to the ED, as in the case of suicide, self-harm, manic episodes or psychotic episodes. Further educating ED staff on this patient population through gatekeeper training may ensure patients receive the best treatment and aid in driving access to mental healthcare delivery changes.

Association of State Access Standards With Accessibility to Specialists for Medicaid Managed Care Enrollees

Importance

Medicaid recipients have consistently reported less timely access to specialists than patients with other types of coverage. By 2018, state Medicaid agencies will be required by the Center for Medicare and Medicaid Services (CMS) to enact time and distance standards for managed care organizations to ensure an adequate supply of specialist physicians for enrollees; however, there have been no published studies of whether these policies have significant effects on access to specialty care.

Objective

To compare ratings of access to specialists for adult Medicaid and commercial enrollees before and after the implementation of specialty access standards.

Design, Setting, and Participants

We used Consumer Assessment of Healthcare Providers and Systems survey data to conduct a quasiexperimental difference-in-differences (DID) analysis of 20 163 nonelderly adult Medicaid managed care (MMC) enrollees and 54 465 commercially insured enrollees in 5 states adopting access standards, and 37 290 MMC enrollees in 5 matched states that previously adopted access standards.

Main Outcomes and Measures

Reported access to specialty care in the previous 6 months.

Results

Seven thousand six hundred ninety-eight (69%) Medicaid enrollees and 28 423 (75%) commercial enrollees reported that it was always or usually easy to get an appointment with a specialist before the policy implementation (or at baseline) compared with 11 889 (67%) of Medicaid enrollees in states that had previously implemented access standards. Overall, there was no significant improvement in timely access to specialty services for MMC enrollees in the period following implementation of standard(s) (adjusted difference-in-differences, -1.2 percentage points; 95% CI, -2.7 to 0.1), nor was there any impact of access standards on insurance-based disparities in access (0.6 percentage points; 95% CI, -4.3 to 5.4). There was heterogeneity across states, with 1 state that implemented both time and distance standards demonstrating significant improvements in access and reductions in disparities.

Conclusions and Relevance

Specialty access standards did not lead to widespread improvements in access to specialist physicians. Meaningful improvements in access to specialty care for Medicaid recipients may require additional interventions.

Practice Innovation, Health Care Utilization and Costs in a Network of Federally Qualified Health Centers and Hospitals for Medicaid Enrollees

State Medicaid programs need cost-effective strategies to provide high-quality care that is accessible to individuals with low incomes and limited resources. Integrated delivery systems have been formed to provide care across the continuum, but creating a shared vision for improving community health can be challenging. Medical Home Network was created as a network of primary care providers and hospital systems providing care to Medicaid enrollees, guided by the principles of egalitarian governance, practice-level care coordination, real-time electronic alerts, and pay-for-performance incentives. This analysis of health care utilization and costs included 1,189,195 Medicaid enrollees. After implementation of Medical Home Network, a risk-adjusted increase of $9.07 or 4.3% per member per month was found over the 2 years of implementation compared with an increase of $17.25 or 9.3% per member per month, before accounting for the cost of care management fees and other financial incentives, for Medicaid enrollees within the same geographic area with a primary care provider outside of Medical Home Network. After accounting for care coordination fees paid to providers, the net risk-adjusted cost reduction was $11.0 million.

Patient-Perceived Access to Care When Actively Seeking Treatment

PURPOSE/OBJECTIVES

To examine predictors of perceived access to care and reported barriers to care of patients with cancer actively seeking treatment.
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DESIGN

Retrospective secondary data analysis.
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SETTING

U.S. Medical Expenditure Panel Survey, a national survey with questions about healthcare coverage and access.
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SAMPLE

1,170 adults with cancer actively seeking treatment.
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METHODS

A retrospective analysis of data. Bivariate tests for significant association between individual characteristics and low perceived access to care were conducted using a chi-square test. 
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MAIN RESEARCH VARIABLES

The dependent variable was perceived access to care. The independent variables included sex, age, race, poverty status, education level, marital status, cancer site, comorbidities, and insurance status.
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FINDINGS

Those with Medicaid insurance or no health insurance had significantly lower perceived access to care compared to those with Medicare. Institutional barriers to treatment, such as financial or insurance, were the most common reported barriers.
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CONCLUSIONS

Most adults with cancer reported adequate access to medical care and medications, but a small yet vulnerable population expressed difficulties in accessing treatment.
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IMPLICATIONS FOR NURSING

To effectively advocate for vulnerable populations with Medicaid or no insurance, nurses may require specialized knowledge beyond the scope of general oncology nursing.

The Affordable Care Act's Impacts on Access to Insurance and Health Care for Low-Income Populations

The Patient Protection and Affordable Care Act (ACA) expands access to health insurance in the United States, and, to date, an estimated 20 million previously uninsured individuals have gained coverage. Understanding the law's impact on coverage, access, utilization, and health outcomes, especially among low-income populations, is critical to informing ongoing debates about its effectiveness and implementation. Early findings indicate that there have been significant reductions in the rate of uninsurance among the poor and among those who live in Medicaid expansion states. In addition, the law has been associated with increased health care access, affordability, and use of preventive and outpatient services among low-income populations, though impacts on inpatient utilization and health outcomes have been less conclusive. Although these early findings are generally consistent with past coverage expansions, continued monitoring of these domains is essential to understand the long-term impact of the law for underserved populations.

Primary care physician assistant and advance practice nurses roles: Patient healthcare utilization, unmet need, and satisfaction

PURPOSE

Team-based care involving physician assistants (PAs) and advance practice nurses (APNs) is one strategy for improving access and quality of care. PA/APNs perform a variety of roles on primary care teams. However, limited research describes the relationship between PA/APN role and patient outcomes. We examined multiple outcomes associated with primary care PA/APN roles.

METHODS

In this cross-sectional survey analysis, we studied adult respondents to the 2010 Health Tracking Household Survey. Outcomes included primary care and emergency department visits, hospitalizations, unmet need, and satisfaction. PA/APN role was categorized as physician only (no PA/APN visits; reference), usual provider (PA/APN provide majority of primary care visits) or supplemental provider (physician as usual provider, PA/APN provide a subset of visits). Multivariable logistic and multinomial logistic regressions were performed.

RESULTS

Compared to people with physician only care, patients with PA/APNs as usual providers [5-9 visits RRR=2.4 (CI 1.8-3.4), 10+ visits RRR=3.0 (CI 2.0-4.5): reference 2-4 visits] and supplemental providers had increased risk of having 5 or more primary care visits [5-9 visits RRR=1.3 (CI 1.0-1.6)]. Patients reporting PA/APN as supplemental providers had increased risk of emergency department utilization [2+ visits: RRR 1.8 (CI 1.3, 2.5)], and lower satisfaction [very dissatisfied: RRR 1.8 (CI 1.03-3.0)]. No differences were seen for hospitalizations or unmet need.

CONCLUSIONS

Healthcare utilization patterns and satisfaction varied between adults with PA/APN in different roles, but reported unmet need did not. These findings suggest a wide range of outcomes should be considered when identifying the best PA/APN role on primary care teams.

The ACA's 65th Birthday Challenge: Moving from Medicaid to Medicare

The Affordable Care Act (ACA) expanded Medicaid to millions of low-income near-elderly Americans, facilitating access to health care services, but did not change income eligibility for Medicaid for those 65 years and older. Therefore, following the ACA's coverage expansion, many newly-insured older enrollees will face a complex insurance transition on their 65th birthday: they will lose Medicaid coverage and transition from Medicaid to Medicare as their primary insurer. This transition in primary health insurance coverage includes changes to benefits, patient cost-sharing, and provider reimbursement, which could have profound consequences on the use of health services and associated health outcomes for low-income seniors. Using data from 2012, we estimate that 1.6 million current Medicaid beneficiaries and an additional 1.6 to 2.9 million low-income individuals who will gain Medicaid coverage under the ACA will be likely to make this transition in the next decade. Primary care physicians and policymakers can help mitigate the potential consequences of this insurance transition by preparing patients for Medicare's more restrictive insurance coverage, encouraging patients to sign up for available low-income subsidies, and understanding how the loss of Medicaid coverage impacts out-of-pocket costs.

The Patient Protection and Affordable Care Act's Effect on Emergency Medicine: A Synthesis of the Data

This review synthesizes the existing literature to provide evidence-based predictions for the future of emergency care in the United States as a result of the Patient Protection and Affordable Care Act, with a focus on emergency department (ED) visit volume, acuity, and reimbursement. Patient behavior will likely be quite different for patients gaining Medicaid than for those gaining private insurance through the Marketplaces. Despite the threat of the individual mandate, not all uninsured patients will enroll, and those who choose to enroll will likely be a different population from those who remain uninsured. New Medicaid enrollees will be a sicker population and will likely increase their number of ED visits substantially. Their acuity will be higher at first but will then revert to the traditionally high number of low-acuity visits made by Medicaid patients. Most patients enrolling through the Marketplace are choosing high-deductible health plans, and they will initially avoid the ED because of high out-of-pocket costs but may present later and sicker after self-rationing their care. Most patients gaining health coverage through the Affordable Care Act will be shifting from uninsured to either Medicaid or private insurance, both of which reimburse more than self-pay, so ED collections should increase. Because of the differences between Medicaid and Marketplace plans, there will be a difference in ED volume, acuity, and financial outcomes, depending on states' current demographics, whether states expand Medicaid, and how aggressively states advertise new options for coverage in Medicaid or state health insurance Marketplaces.