The Effect of Medicaid Expansion on Utilization in Maryland Emergency Departments

Is the emergency department used as a substitute or a complement to primary care in Medicaid?

Policies to decrease low-acuity emergency department (ED) use have traditionally assumed that EDs are a substitute for unavailable primary care (PC). However, such policies can exacerbate ED overcrowding, rather than ameliorate it, if patients use EDs to complement, rather than substitute, their PC use. We tested whether Medicaid managed care enrolees visit the ED for nonemergent and PC treatable conditions to substitute for or to complement PC. Based on consumer choice theory, we modelled county-level monthly ED visit rate as a function of PC supply and used 2012-2015 New York Statewide Planning and Research Cooperative System (SPARCS) outpatient data and non-linear least squares method to test substitution vs complementarity. In the post-Medicaid expansion period (2014-2015), ED and PC are substitutes state-wide, but are complements in highly urban and poorer counties during nights and weekends. There is no evidence of complementarity before the expansion (2012-2013). Analyses by PC provider demonstrate that the relationship between ED and PC differs depending on whether PC is provided by physicians or advanced practice providers. Policies to reduce low-acuity ED use via improved PC access in Medicaid are likely to be most effective if they focus on increasing actual appointment availability, ideally by physicians, in areas with low PC provider supply. Different aspects of PC access may be differently related to low-acuity ED use.

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.

The Effects of the Medicaid Expansion on Hospital Utilization, Employment, and Capital

In recent years, hospitals reacted to changes in demand caused by the Affordable Care Act Medicaid expansions. We conducted a difference-in-differences analysis that compared changes to hospital demand and supply in Medicaid expansion and nonexpansion states. We used 2010-2016 data from the American Hospital Association and the Healthcare Cost Report Information System to quantify changes to hospital utilization and characterize how hospitals adjusted labor and capital inputs. During the period studied, the Medicaid expansion was associated with increases in emergency department visits and other outpatient hospital visits. We find strong evidence that hospitals met increases in demand by hiring nursing staff and weaker evidence that they increased hiring of technicians and investments in equipment. We found no evidence that hospitals adjusted hiring of physicians, support staff, or investments in other capital inputs.

Time trends in emergency department use among adults with intellectual and developmental disabilities

BACKGROUND

Emergency Department (ED) visits are common among adults with intellectual and developmental disabilities (IDD). However, little is known about how ED use has varied over time in this population, or how it has been affected by recent Medicaid policy changes.

OBJECTIVE

To examine temporal trends in ED use among adult Medicaid members with IDD in eight states that ranged in the extent to which they had implemented state-level Medicaid policy changes that might affect ED use.

METHODS

We conducted repeated cross-sectional analyses of 2010-2016 Medicaid claims data. Quarterly analyses included adults ages 18-64 years with IDD (identified by diagnosis codes) who were continuously enrolled in Medicaid for the past 12 months. We assessed change in number of ED visits per 1000 member months from 2010 to 2016 overall and interacted with state level policy changes such as Medicaid expansion.

RESULTS

States with no Medicaid expansion experienced an increase in ED visits (linear trend coefficient: 1.13, p < 0.01), while states operating expansion via waiver had a much smaller (non-significant) increase, and states with ACA-governed expansion had a decrease in ED visits (linear trend coefficient: 1.17, p < 0.01). Other policy changes had limited or no association with ED visits.

CONCLUSIONS

Medicaid expansion was associated with modest reduction or limited increase in ED visits compared to no expansion. We found no consistent decrease in ED visits in association with other Medicaid policy changes.

Crowd-Out and Emergency Department Utilization

When consumers gain Medicaid, their cost of healthcare changes. The direction of this change determines how utilization changes. The previously uninsured see a stark decrease in the price of primary care after gaining public insurance. Due to charity care, they may face an increase in the price of emergency department care. The previously insured see a reduction in emergency department prices and decreased access to primary care. We examine the impact of the prior insurance status of the newly publicly insured on substitution between healthcare. We base our identification on California's LIHP and ACA Medicaid expansions. One challenge we face is estimating crowd-out. We use machine learning techniques to predict prior insurance status based on observable covariates in cross-sectional data. We find an increase in emergency department utilization caused entirely by those crowded-out whose access to primary care has decreased. We find the opposite utilization patterns for the previously uninsured.

Analysis of Emergency Department Utilization in Medicaid Expansion and Non-expansion States

Introduction

The Affordable Care Act has been debated since its initial enactment over a decade ago. One of the primary topics for discussion has been Medicaid expansion, which has created a schism across the United States. The effects of Medicaid expansion largely remain unclear. The purpose of this report is to elucidate how Medicaid expansion has impacted emergency department (ED) utilization by analyzing Medicaid expansion and non-expansion states to determine who visited the ED and the reason for the visit.

Methods

We conducted a retrospective analysis using de-identified electronic medical record (EMR) data from 56,423 patients and 33 different hospitals (18 Medicaid non-expansion and 15 Medicaid expansion) who visited the ED in 2019. We used geographical demographics and insurance status to categorize patients who visited the ED and ambulatory care sensitive conditions (ACSC) to identify the reasons for the visit. Logistic regression and chi-square analysis were used to analyze the data.

Results

We observed a significant relationship between Medicaid expansion and geographic region such that patients living in rural or semirural regions likely resided in Medicaid non-expansion states. Patients using self-pay were more likely to live in a Medicaid non-expansion state than a Medicaid expansion state (32.3% vs. 21.5%, p-value < 0.0001). Finally, there were no significant differences between the top five ACSC for Medicaid expansion and Medicaid non-expansion states but living in an expansion state was significantly (p < 0.01) related to being diagnosed with an ACSC (OR, 1.056; 95% CI, 1.013-1.100).

Conclusion

In conclusion, Medicaid expansion was associated with differences in the use of medical resources. Patients using Medicaid insurance who reside in Medicaid expansion states preferentially use the ED. Geographical location does play a role in ED utilization and ambulatory care sensitive condition diagnoses in patients. Despite these findings, the full effects of Medicaid expansion on ED utilization require further investigation. However, our research indicates that Medicaid expansion is not the singular solution in decreasing ED utilization and healthcare costs.

Revisiting racial disparities in ED CT utilization during the Affordable Care Act era: 2009-2018 data from the NHAMCS

OBJECTIVE

To examine the trends in CT utilization in the emergency department (ED) for different racial and ethnic groups, factors that may affect utilization, and the effects of increased insurance coverage since passage of the Affordable Care Act in 2010.

MATERIALS AND METHODS

Data from the National Hospital Ambulatory Medical Care Survey (NHAMCS) for the years 2009-2018 were used for the analysis. The NHAMCS is a cross-sectional survey which has random and systematical samples of more than 200,000 visits to over 250 hospital EDs in the USA. Patient demographic characteristics, source of payment/insurance, clinical presentation, and disposition from the ED were recorded. Descriptive statistics and multivariate logistic regression were performed.

RESULTS

Between 2009 and 2018, the rate of uninsured patients in the ED decreased from 18.1% to as low as 9.9%, but this was not associated with a decrease in the disparity in CT utilization between non-Hispanic Black and non-Hispanic White patients. CT use rate increased 38% over the study period. Factors strongly associated with CT utilization include age, source of payment, triage category, disposition from the ED, and residence. After controlling for these factors, non-Hispanic White patients were 21% more likely to undergo CT than non-Hispanic Black patients, though no disparity was seen for Hispanic or Asian/other groups.

CONCLUSION

Despite increased insurance coverage over the sample period, racial disparities between non-Hispanic Black and non-Hispanic White patients persist in CT utilization, though no disparity was seen for Hispanic or Asian/other patients. The source of this disparity remains unclear and is likely multifactorial.

Impact of Medicaid expansion on mental health and substance use related emergency department visits

Background: Although Medicaid expansion under the Affordable Care Act reduces uninsurance, little evidence exists on its impact on mental health and substance use (MHSU) related healthcare utilization. Therefore, the objectives of this study are to examine the impact of Medicaid expansion on emergency department visits related to mental health and substance use disorders and to examine its effect on the variation in payer mix. Methods: The study utilizes state-level quarterly emergency department (ED) visit data from Healthcare Cost and Utilization Project's Fast Stats Database, along with state socio-demographic and health policy data for the analysis. A difference-in-differences regression analysis approach was utilized in comparing MHSU-related ED visit data between expansion and non-expansion states from 2006 to 2019 for all visits and by payer mix. Results: Medicaid expansion was associated with additional 0.35 non-Medicare adult MHSU-related ED visits per 1,000 population (p < 0.05) in expansion states compared with non-expansion states. In addition, Medicaid expansion was associated with about 20.4% increase (p < 0.01) in Medicaid-share of MHSU-related ED visits, about 17.4% reduction (p < 0.01) in uninsured-share of MHSU-related ED visits, and about 3% reduction (p < 0.05) in privately-insured share of MHSU-related ED visits in expansion states compared with non-expansion states. Conclusions: The findings indicate that Medicaid expansion was associated with increased MHSU-related ED visits among the Medicaid population and the overall non-Medicare adult population, while it was associated with reductions in MHSU-related ED visits among the uninsured and privately-insured populations in expansion states compared with non-expansion states.

The effect of expanded insurance coverage under the Affordable Care Act on emergency department utilization in New York

BACKGROUND

One of the proposed benefits of expanding insurance coverage under the Affordable Care Act (ACA) was a reduction in emergency department (ED) utilization for non-urgent visits related to lack of health insurance coverage and access to primary care providers. The objective of this study was to estimate the effect of the 2014 ACA implementation on ED use in New York.

METHODS

We used the Healthcare Cost and Utilization Project State Emergency Department and State Inpatient Databases for all outpatient and all inpatient visits for patients admitted through an ED from 2011 to 2016. We focused on in-state residents aged 18 to 64, who were covered under Medicaid, private insurance, or were uninsured prior to the 2014 expansion. We estimated the effect of the expanded insurance coverage on average monthly ED visits volumes and visits per 1000 residents (rates) using interrupted time-series regression analyses.

RESULTS

After ACA implementation, overall average monthly ED visits increased by around 3.0%, both in volume (9362; 95% Confidence Intervals [CI]: 1681-17,522) and in rates (0.80, 95% CI:0.12-1.49). Medicaid covered ED visits volume increased by 23,972 visits (95% CI: 16,240 -31,704) while ED visits by the uninsured declined by 13,297 (95% CI:-15,856 - -10,737), and by 1453 (95% CI:-4027-1121) for the privately insured. Medicaid ED visits rates per 1000 residents increased by 0.77 (95% CI:-1.96-3.51) and by 2.18 (95% CI:-0.55-4.92) for those remaining uninsured, while private insurance visits rates decreased by 0.48 (95% CI:-0.79 - -0.18). We observed increases in primary-care treatable ED visits and in visits related to mental health and alcohol disorders, substance use, diabetes, and hypertension. All estimated changes in monthly ED visits after the expansion were statistically significant, except for ED visit rates among Medicaid beneficiaries.

CONCLUSION

Net ED visits by adults 18 to 64 years of age increased in New York after the implementation of the ACA. Large increases in ED use by Medicaid beneficiaries were partially offset by reductions among the uninsured and those with private coverage. Our results suggest that efforts to expand health insurance coverage only will be unlikely to reverse the increase in ED use.

Emergency Department and Ambulatory Care Visits in the First Twelve Months of Coverage Under Medicaid Expansion: A Group-Based Trajectory Analysis

STUDY OBJECTIVE

More than 17 million people have gained health insurance coverage through the Patient Protection and Affordable Care Act's Medicaid expansion. Few studies have examined heterogeneity within the Medicaid expansion population. We do so based on time-varying patterns of emergency department (ED) and ambulatory care use, and characterize diagnoses associated with ED and ambulatory care visits to evaluate whether certain diagnoses predominate in individual trajectories.

METHOD

We used group-based multitrajectory modeling to jointly estimate trajectories of ambulatory care and ED utilization in the first 12 months of enrollment among Pennsylvania Medicaid expansion enrollees from 2015 to 2017.

RESULTS

Among 601,877 expansion enrollees, we identified 6 distinct groups based on joint trajectories of ED and ambulatory care use. Mean ED use varied across groups from 3.4 to 48.7 visits per 100 enrollees in the first month and between 2.8 and 44.0 visits per 100 enrollees in month 12. Mean ambulatory visit rates varied from 0.0 to 179 visits per 100 enrollees in the first month and from 0.0 to 274 visits in month 12. Rates of ED visits did not change over time, but rates of ambulatory care visits increased by at least 50% among 4 groups during the study period. Groups varied on chronic condition diagnoses, including mental health and substance use disorders, as well as diagnoses associated with ambulatory care visits.

CONCLUSION

We found substantial variation in rates of ED and ambulatory care use across empirically defined subgroups of Medicaid expansion enrollees. We also identified heterogeneity among the diagnoses associated with these visits. This data-driven approach may be used to target resources to encourage efficient use of ED services and support engagement with ambulatory care clinicians.

Association of Affordable Care Act Implementation With Ambulance Utilization for Asthma Emergencies in New York City, 2008-2018

IMPORTANCE

Emergency medical services (EMS) are an essential component of the health care system, but the effect of insurance expansion on EMS call volume remains unclear.

OBJECTIVE

This study investigated the association between health insurance expansion and EMS dispatches for asthma, an ambulatory care-sensitive condition. We hypothesized that insurance expansion under the Patient Protection and Affordable Care Act (ACA) would be associated with decreased EMS dispatches for asthma emergencies.

DESIGN, SETTING, AND PARTICIPANTS

This cohort study examined 14 865 267 ambulance calls dispatched within New York City from 2008 to 2018, including 217 303 calls for asthma-related emergencies, and used interrupted time series analysis to study the change in the annual incidence of EMS dispatches for asthma emergencies after implementation of the ACA. Multivariable linear regression examined the association between the uninsured rate and the incidence of asthma-related dispatches, controlling for population demographic characteristics and air quality index.

EXPOSURES

Implementation of ACA on January 1, 2014.

MAIN OUTCOMES AND MEASURES

Incidence of EMS dispatches for asthma emergencies per 100 000 population per year (ie, asthma EMS dispatch rate) as classified by the 911 call-taker.

RESULTS

In this study of 217 303 EMS dispatches for asthma-related emergencies, there was a decrease in the asthma EMS dispatch rate after implementation of the ACA, from a mean (SD) of 261 (24) dispatches per 100 000 population per year preintervention to 211 (47) postintervention (P = .047). This decrease in asthma EMS dispatch rate after ACA implementation was significant on interrupted time series analysis. Prior to 2014, the annual asthma EMS dispatch rate was increasing by 11.8 calls per 100 000 population per year (95% CI, 6.1 to 17.4). After ACA implementation, the asthma EMS dispatch rate decreased annually by 28.5 calls per 100 000 population per year (95% CI, -37.6 to -19.3), a significant change in slope from the preintervention period (P < .001). Multivariable linear regression, controlling for percentage of individuals younger than age 18 years, degree of racial/ethnic diversity, median household income, and air quality index, found that a 1% decrease in the citywide uninsured rate was associated with a decrease of 98.9 asthma dispatches per 100 000 population per year (95% CI, 5.72-192.10; P = .04).

CONCLUSIONS AND RELEVANCE

Insurance expansion within New York City under the ACA was associated with a significant reduction in the asthma EMS dispatch rate. Insurance expansion may be a viable method to reduce EMS utilization for ambulatory care-sensitive conditions such as asthma.

The effect of Medicaid expansion among adults from low-income communities on stage at diagnosis in those with screening-amenable cancers

BACKGROUND

Several states have opted to expand Medicaid under the Patient Protection and Affordable Care Act (ACA), which offers insurance coverage to low-income individuals up to 138% of the federal poverty level. This expansion of Medicaid to a medically vulnerable population potentially can reduce cancer outcome disparities, especially among patients with screening-amenable cancers. The objective of the current study was to estimate the effect of Medicaid expansion on the percentage of adults from low-income communities with screening-amenable cancers who present with metastatic disease.

METHODS

Using state cancer registry data linked with block group-level income data, a total of 12,760 individuals aged 30 to 64 years who were diagnosed with incident invasive breast (female), cervical, colorectal, or lung cancer from 2011 through 2016 and who were uninsured or had Medicaid insurance at the time of diagnosis were identified. This sample was probability weighted based on income to reflect potential Medicaid eligibility under the ACA's Medicaid expansion. A multivariable logistic model then was fitted to examine the independent association between the exposure (pre-expansion [years 2011-2013] vs postexpansion [years 2014-2016]) and the outcome (metastatic vs nonmetastatic disease at the time of diagnosis).

RESULTS

After adjusting for potential confounders, individuals who were diagnosed postexpansion were found to have 15% lower odds of having metastatic disease compared with those who were diagnosed pre-expansion (adjusted odds ratio, 0.85; 95% confidence interval, 0.77-0.93). As a control, a separate analysis that focused on individuals with private insurance who resided in high-income communities found nonsignificant postexpansion (vs pre-expansion) changes in the outcome (adjusted odds ratio, 1.02; 95% confidence interval, 0.96-1.09).

CONCLUSIONS

Medicaid expansion is associated with a narrowing of a critical cancer outcome disparity in adults from low-income communities.

The Affordable Care Act and emergency department use by low acuity patients in a US hospital

BACKGROUND

The Affordable Care Act (ACA) is one of the biggest healthcare reforms in US history. A key issue is the ACAs effect on low acuity, potentially primary care patients. This study evaluates the effect of the ACA on low acuity patients seen in the emergency department (ED).

METHODS

This is an age-period-cohort analysis for a community hospital ED in Michigan, from 2009 to 2015. Patients were stratified by age, year seen, emergency severity index (ESI) and insurance status. Data were compared between before and after ACA along with descriptive statistics, Chi-square and Student t-tests. The primary outcome was the change in ED usage by low acuity. Patients > 65 were used as a temporal control.

RESULTS

305,350 ED visits were analyzed. ED visits with ESI 4/5 increased from 11.9% to 14.8%. Patients < 19 years increased from 25.5% to 34.3% (p = .0026). Ages 19-25 increased from 16.3% to 19.7% (p = 0.0515). Ages 26-64 increased from 11% to 14.9% (p = 0.0129). Ages > 65 increased from 5.1% to 6.5%. Patients < 65 showed a decreased uninsured rate from 12.30% to 6.28% (p < 0.0001). Comparatively, for age > 65: uninsured rate remained the same 0.46% to 0.49%.

CONCLUSION

Low acuity ED visits increased with the ACA reform in conjunction with a more insured population.

Association Between the ACA Medicaid Expansions and Primary Care and Emergency Department Use During the First 3 Years

BACKGROUND

Evidence is limited and mixed as to how the Patient Protection and Affordable Care Act (ACA) Medicaid expansions affected the utilization of primary care physicians (PCPs) and emergency departments (EDs) at the national level.

OBJECTIVE

To examine the association between the ACA Medicaid expansions and changes in the utilization of PCP and ED visits at the national level during the first 3 years (2014-2016) of the implementation.

DESIGN

A difference-in-differences analysis to compare outcomes between individuals in 32 states that expanded Medicaid versus individuals in 19 non-expansion states.

PARTICIPANTS

A nationally representative sample of US-born individuals 26-64 years old with family incomes lower than 138% of the federal poverty level from the 2010-2016 Medical Expenditure Panel Survey.

INTERVENTION

ACA Medicaid expansions MAIN MEASURES: We examined PCP-related outcomes ((i) whether a participant had any PCP visit during a year and (ii) the annual number of PCP visits per person) and ED-related outcomes ((i) whether a participant had any ED visit during a year and (ii) the annual number of ED visits per person).

KEY RESULTS

A total of 17,803 participants were included in our analysis. We found that the proportion of individuals with any PCP visit during a year marginally increased (difference-in-differences estimate, + 3.6 percentage points [pp]; 95% CI, - 0.4 pp to + 7.6 pp; P = 0.08) following the Medicaid expansions, without any change in the annual number of PCP visits per person. We found no evidence that ED utilization (both the proportion of individuals with any ED visit during a year and the annual number of ED visits per person) changed meaningfully after the Medicaid expansions.

CONCLUSION

Using the nationally representative data of individuals who were affected by the ACA, we found that the ACA Medicaid expansions were associated with a modest improvement in access to PCPs without an increase in ED use.

Resource utilization across the continuum of HIV care: An emergency department-based cohort study

BACKGROUND

The objective of this study was to determine the healthcare resource utilization for people living with HIV (PLWH) presenting to the emergency department (ED) across the HIV Care Continuum.

METHODS

This prospective study enrolled PLWH presenting to an urban ED between June 2016 and March 2017. Subjects were categorized as being linked to care, retained in care, on antiretroviral therapy (ART), and virally suppressed (<200 copies/ml). Data on ED visit rates, duration of stay, and hospital admission rates were compared to local metrics.

RESULTS

Overall, 94.3% of 159 enrollees had been linked to care, 75.5% retained in care, 81.1% on ART, and 62.8% virally suppressed. Compared to the general population of the city and of the ED, participants had a higher ED visit rate (3.0 v. 1.2 visits per person-per year) in the past two years, a higher median duration of ED stay (12.6 v. 7.6 h), and a higher hospital admission rate (36.5% v. 24.9%) during their index ED visit. Viral suppression was negatively associated with admission (OR = 0.35, 95% CI: 0.17, 0.72). Forty-eight (30.2%) participants who had at least eight ED visits in the past two years were more likely to have a diagnosed mental health disorder (79.2% v. 62.2%, p=0.036).

CONCLUSIONS

Our results showed that PLWH use more ED resources than the general population and a better engagement in HIV care is linked to lesser ED resource utilization for PLWH, indicating the importance of improved HIV care engagement in healthcare utilization management.

Where Do Oregon Medicaid Enrollees Seek Outpatient Care Post-affordable Care Act Medicaid Expansion?

BACKGROUND

Previous studies suggest the newly Medicaid insured are more likely to use the emergency department (ED) however they did not differentiate between patients established or not established with primary care.

OBJECTIVES

To understand where Oregon Medicaid beneficiaries sought care after the Patient Protection and Affordable Care Act (PPACA) Medicaid expansion (ED, primary care, or specialist) and the interaction between primary care establishment and outpatient care utilization.

RESEARCH DESIGN

A retrospective cohort study.

SUBJECTS

Adults continuously insured from 2014 through 2015 who were either newly, returning, or continuously insured post-PPACA.

MEASURES

Site of first and last outpatient visit, established with primary care status, and outpatient care utilization.

RESULTS

The odds of being established with primary care at their first visit were lower among newly [odds ratio (OR), 0.18; 95% confidence interval (CI), 0.18-0.19] and returning insured (OR, 0.22; 95% CI, 0.22-0.23) than the continuously insured. Continuously insured, new patients with primary care had higher odds of visiting the ED (OR, 2.15; 95% CI, 2.01-2.30) at their first visit than newly or returning insured. Patients established with a single primary care provider in all insurance groups had lower rates of ED visit, whereas those established with multiple primary care providers had the highest ED visit rates.

CONCLUSIONS

Most newly and returning insured Medicaid enrollees sought primary care rather than ED services and most became established with primary care. Our findings suggest that both insurance and primary care continuity play a role in where patients seek health care services.

Self-Check-In Kiosks Utilization and Their Association With Wait Times in Emergency Departments in the United States

BACKGROUND

Delayed care in emergency departments (EDs) is a serious problem in the United States. Patient wait time is considered a critical measure of delayed care in EDs. Several strategies have been employed by EDs to reduce wait time, including implementation of self-check-in kiosks. However, the effect of kiosks on wait time in EDs is understudied.

OBJECTIVES

To assess the association between patient wait time and utilization of self-check-in kiosks in EDs. To investigate a series of other patient-, ED-, and hospital-level predictors of wait time in EDs.

METHODS

Using data from the 2015 and 2016 National Hospital Ambulatory Medical Care Survey, we analyzed 40,528 ED visits by constructing a multivariable linear regression model of the log-transformed wait time data as an outcome, then computing percent changes in wait times.

RESULTS

During the study period, about 9% of EDs in the United States implemented kiosks. In our linear regression model, the wait time in EDs with kiosk self-check-in services was 56.8% shorter (95% confidence interval ̶ 130% to ̶ 6.4%, p < 0.05) compared with EDs without kiosk services. In addition to kiosks, patients' day of visit, arrival time, triage assessment, arrival by ambulance, chronic medical conditions, ED boarding, hospitals' full-capacity protocol, and hospitals' location were significant predictors of wait time.

CONCLUSIONS

Self-check-in kiosks are associated with shorter ED wait time in the United States. However, prolonged ED wait time continues to be a system-wide problem, and warrants multilayered interventions to address this challenge for those who are in acute need of immediate care.

National Patterns of Emergency Department Use for Women with Endometriosis, 2006-2015

Introduction: Endometriosis is a burdensome chronic condition for which conservative management is often recommended when indicated. Nonetheless, some women seek care for endometriosis in the emergency department (ED). We evaluated trends in ED visits for endometriosis from 2006 to 2015. Materials and Methods: Nationally representative estimates of ED visits for endometriosis by women aged 18-49 were extracted from the Health Care Utilization Project Nationwide Emergency Department Sample into three cohorts by calendar years 2006-2007, 2010-2011, and 2014-Q3 2015. Visits with a principal diagnosis code of endometriosis (International Classification of Disease, 9th Edition, Clinical Modification, code 617.x) were included. Patient and hospital characteristics were compared across cohorts using analysis of variance. Trends in the proportion of ED visits ending in inpatient admission and in mean charges (2015 USD) were assessed using generalized linear models controlling for patient and hospital characteristics. Results: The annual number of ED visits nationally was stable at ∼15,000 visits per year during 2006-2015. From 2006-2007 to 2014-2015, the composition of ED visits shifted away from private pay (42.0% vs. 35.3%) and uninsured (23.6% vs. 16.6%) to Medicaid (26.7% vs. 40.1%) and became more concentrated in metro-teaching hospitals (33.9% vs. 51.9%) (p < 0.001 for all). Inpatient admission rates declined from 20.1% to 9.2% (p < 0.001). Mean ED charges increased from $2458 to $4953 (p < 0.001). Conclusion: During 2006-2015, the number of ED visits for endometriosis remained stable, the inpatient admission/transfer rate declined by half, and mean charges per visit doubled.

Examining the Effect of the Affordable Care Act on Two Illinois Emergency Departments

Introduction

The emergency department (ED) has long served as a safety net for the uninsured and those with limited access to routine healthcare. This study aimed to compare the characteristics and severity of ED visits in an Illinois academic medical center (AMC) and community hospital (CH) of a single health system before and after the implementation of the Affordable Care Act (ACA).

Methods

This was a retrospective record review of 357,764 ED visits from January 1, 2011–December 31, 2016, of which 74% were at the AMC and 26% at the CH. We assessed the severity of ED visits by applying the previously validated Ballard algorithm, which classifies ED visits as non-emergent, intermediate, or emergent. Descriptive analyses were conducted to compare the characteristics of ED visits before and after the implementation of the ACA. We conducted multilevel logistic regression analysis to examine the odds of non-emergent compared to intermediate/emergent ED visits by the ACA implementation status controlling for patient demographic characteristics, insurance status, and multiple visits per patient.

Results

ED visits for patients with Medicaid or other governmental coverages increased in the post-ACA compared to pre-ACA period (Pre: 33.2 % vs Post: 38.3% at the AMC, and Pre: 29.7% vs Post: 35.1% at the CH). A statistically significant decrease in ED visits for uninsured patients was observed at the AMC and CH in the post-ACA period compared to the pre-ACA period (Pre: 12.1% vs Post: 6.4%, and Pre: 13.9% vs Post: 9.8%, respectively). Results from the regression analysis showed a significant decreased odds of non-emergent vs intermediate/emergent ED visits during the post-ACA period compared to the pre-ACA period at the AMC (odds ratio [OR] 0.68; confidence interval [CI], 0.66–0.70). However, an increased odds of non-emergent vs. intermediate/emergent ED visits was observed at the CH (OR 1.09; CI, 1.04–1.14).

Conclusion

Similar to other Medicaid expansion states, ED utilization for uninsured patients decreased at both the AMC and the CH in the post-ACA period. While Medicaid visits for children < 18 years declined in the post-ACA period, it increased for ages 21 to 65 years of age. Contrary to our hypothesis, the severity of emergent ED visits increased in the post-ACA period but not at the CH.

Geographic Variance in Maryland's Potentially Preventable Emergency Visits: Comparison of Explanatory Models

The use of emergency departments (EDs) for potentially preventable visits is costly and inefficient. In Maryland, about 20%-30% of such visits are ambulatory care sensitive and thus potentially preventable. The uninsured are often perceived to account for a disproportionate share of such visits. This analysis aimed to (a) compare and explain the geographic variance in Maryland's potentially preventable ED visit (PPV) rates for the total and uninsured populations and (b) test the predictive value of regression models developed. Geographic hot spots of increased PPV rates were highly correlated for uninsured and total populations, but uninsured rates were more clustered in urban areas. Poisson and geographically weighted regression (GWR) models best fit the data and predicted 40%-52% and 46% of the variance in 2009 total and uninsured rates, respectively. Significant predictors of increased PPV rates were social determinants of health: lower per capita income and education levels, and higher percentage of female-headed households.

US Emergency Department Visits and Hospital Discharges Among Uninsured Patients Before and After Implementation of the Affordable Care Act

IMPORTANCE

The US Patient Protection and Affordable Care Act of 2010 (ACA) was enacted in 2010 with several provisions that targeted reducing numbers of uninsured Americans.

OBJECTIVE

To assess the numbers and proportion of emergency department (ED) visits (2006-2016) and hospital discharges (2006-2016) by uninsured patients, focusing on the 2014 ACA insurance reforms (Medicaid expansion, individual mandate, and private insurance exchanges).

DESIGN, SETTING, AND PARTICIPANTS

Cross-sectional study of visitors to US EDs and patients discharged from US hospitals using National Hospital Ambulatory Care Survey data and Healthcare Cost and Utilization Project data, respectively, from 2006 to 2016. Data analysis took place in February 2019.

MAIN OUTCOMES AND MEASURES

Numbers and proportions of total and uninsured ED visits and hospital discharges. Simple descriptive statistics and interrupted time-series analysis were used to assess changes in uninsured visits over time and after the implementation of insurance provisions in 2014.

RESULTS

There were an estimated 1.4 billion US ED visits from 2006 to 2016 and 405 million hospital discharges from 2006 to 2016. Over the study period, ED visits increased by 2.3 million per year, while hospital discharges decreased from approximately 38 million per year prior to 2009 to approximately 36 million per year after, with no clear decrease after 2013. Proportions of uninsured ED visits were largely unchanged from 2006 (16%) until 2013 (14%) (-0.2 percentage point per year; 95% CI, -0.46 to -0.01 percentage point; P = .11) but then decreased by 2.1 percentage points per year from 2014 to 2016 (95% CI, -4.3 to -1.8 percentage points; P = .003), with uninsured visits composing 8% of the total in 2016. For patients aged 18 to 64 years, uninsured ED visits declined from approximately 20% from 2006 through 2013 to 11% in 2016 (3.1% decrease per year after 2013; 95% CI, -4.3 to -1.8 percentage points; P = .003). The proportion of hospital discharges by uninsured patients remained steady at approximately 6% from 2006 to 2013, then declined to 5% in 2014 and 4% in 2016. Similar changes were seen for patients aged 18 to 64 years, with a decrease in hospital discharges from 10% to 7% over the study period.

CONCLUSIONS AND RELEVANCE

Proportions of ED visits and hospital discharges by uninsured patients decreased considerably after the implementation of the 2014 ACA insurance provisions. Despite these changes, approximately 1 in 10 ED visits and 1 in 20 hospital discharges were made by uninsured individuals in 2014 to 2016. This suggests that continued attention is needed to address the lack of insurance in US hospital visits, particularly among people aged 18 to 64 years who have less access to government-sponsored insurance.

Emergency department patient payer status after implementation of the Affordable Care Act: A nationwide analysis using NHAMCS data

OBJECTIVE

To evaluate changes in insurance status among emergency department (ED) patients presenting in the two years immediately before and after full implementation of the Affordable Care Act (ACA).

METHODS

We evaluated National Hospital Ambulatory Medical Care Survey (NHAMCS) Emergency Department public use data for 2012-2015, categorizing patients as having any insurance (private; Medicare; Medicaid; workers' compensation) or no insurance. We compared the pre- and post-ACA frequency of insurance coverage-overall and within the older (≥65), working-age (18-64) and pediatric (<18) subpopulations-using unadjusted odds ratios with 95% confidence intervals. We also conducted a difference-in-differences analysis comparing the change in insurance coverage among working-age patients with that observed for older Medicare-eligible patients, while controlling for sex, race and underlying temporal trends.

RESULTS

Overall, the proportion of ED patients with any insurance did not significantly change from 2012 to 2013 to 2014-2015 (74.2% vs 77.7%) but the proportion of working-age adult patients with at least one form of insurance increased significantly, from 66.0% to 71.8% (OR 1.31, CI: 1.13-1.52). The difference-in-differences analysis confirmed the change in insurance coverage among working-age adults was greater than that seen in the reference population of Medicare-eligible adults (AOR 1.70, CI: 1.29-2.23). The increase was almost entirely attributable to increased Medicaid coverage.

CONCLUSION

In the first two years following full implementation of the ACA, there was a significant increase in the proportion of working-age adult ED patients who had at least one form of health insurance. The increase appeared primarily associated with expansion of Medicaid.

The Impact of the Evolving Health Care System on Pediatric Emergency Care

This article discusses the implications of health care reform on the pediatric emergency department (ED). The author briefly discusses the health care costs and outcomes in the United States in comparison to other developed nations. The article discusses the impact of the Affordable Care Act and insurance expansion on the pediatric ED. Then the article addresses the impacts of the growing patient financial responsibility on ED use. There will be a discussion of the development of pediatric accountable care organizations and how payment mechanisms are evolving, and the challenges the pediatric ED may face in these new payment strategies.

Impact of healthcare reform on the payer mix among young adult emergency department utilizers across the United States (2005-2015)

Before the patient protection and affordable care act (ACA), young adults (20 to 34) had the highest uninsured rates in the United States (US) and frequently sought care in emergency departments (EDs).We aimed to determine if there was a measurable effect of expanded coverage, specifically the dependent coverage provision and Medicaid expansion, on the payer mix of young adults in EDs.We performed a retrospective cross-sectional study of ED utilization among young adults across the US using the national hospital ambulatory medical care survey (NHAMCS) (2005-2015).We examined the effect of health reform changes on the prevalence and odds of having an insurance type among ED utilizers (19-30) in 3 time periods (2005-2010), (2011-2013), and (2014-2015). Additionally, we compared the national and ED payer mix proportions among 19 to 25 and 26 to 30-year-olds.Our results indicate significant proportional changes in the national and ED payer mix relative to a pre-ACA time period. The 2 greatest changes to the national payer mix were the reduction in the proportion of uninsured/self-payers and the increase in the proportion covered by Medicaid. Furthermore, the dependent coverage provision was effective in increasing the proportion of those (19-25) utilizing private insurance coverage. Lastly, there is now a lower proportion of uninsured young adults in the ED, and an increased proportion of those covered by Medicaid.The change in payer mix among young adults has potential long-term consequences for the provision of emergency department services in the U.S.

Changes in Reimbursement to Emergency Physicians After Medicaid Expansion Under the Patient Protection and Affordable Care Act

STUDY OBJECTIVE

We examine the effect of Medicaid expansion on reimbursement for emergency physicians' professional services.

METHODS

We conducted a retrospective study using data from a national emergency medicine group in a sample of 50 emergency departments (EDs) from July 1, 2012, to June 30, 2015. We categorized facilities in 14 states into full-expansion (23), partial-expansion (17), and nonexpansion (10) categories based on pre-expansion Medicaid eligibility criteria for all adults. We used a difference-in-differences design to assess the effect of Medicaid expansion on provider reimbursement per visit. Secondary outcomes included reimbursement per relative value unit and relative value units per visit, both overall and by payer type, controlling for age, sex, billing codes, and health system relationship.

RESULTS

We studied greater than 6.7 million ED visits during July 2012 to December 2015, 3.0 million pre-expansion and 3.7 million postexpansion. After adjusting for covariates, reimbursement per visit increased 6.3% (95% confidence interval 1.4% to 11.1%) in full-expansion relative to nonexpansion states and did not change significantly in partial-expansion versus nonexpansion states. Reimbursement per visit for commercial insurance increased 17.1% (95% confidence interval 9.9% to 24.2%) in full-expansion versus nonexpansion states. Reimbursement for self-pay visits increased 9.7% (95% confidence interval 3.7% to 15.7%) in full-expansion versus nonexpansion states. Changes in payments were driven by higher reimbursement per relative value unit; relative value units per visit declined slightly in full-expansion compared with nonexpansion states.

CONCLUSION

In this sample, full Medicaid expansion increased payments for emergency physicians' professional services compared with reimbursement in nonexpansion states. Higher reimbursement was driven primarily by lower proportions of uninsured patients and increased reimbursement per visit for both commercially insured and self-pay patients in states with full Medicaid expansion.

Emergency Department Utilization Among the Uninsured During Insurance Expansion in Maryland

STUDY OBJECTIVE

We analyzed the effect of insurance expansion on emergency department (ED) utilization among the uninsured in Maryland, which expanded Medicaid eligibility and created health insurance exchanges in 2014.

METHODS

This was a retrospective analysis of statewide administrative claims for July 2012 to December 2015. We used coarsened exact matching to pair uninsured and insured (Medicaid, Medicare, commercial, and other) adult Maryland residents who visited an ED or were hospitalized at baseline (July 2012 to December 2013). We compared ED utilization between these groups after insurance expansion (January 2014 to December 2015), using a difference-in-differences quasi-experimental design. Nonreturning patients from the baseline period were included in the post-insurance expansion rates as having zero visits.

RESULTS

Matching yielded 178,381 pairs. In the 12 months before insurance expansion, the baseline uninsured group visited the ED at a rate of 26.1 per 100 patient-quarters versus 28.2 among the insured group (relative rate=0.93). In the 24 months after insurance expansion, 45% of the baseline uninsured returned to an ED, of whom 33% returned uninsured, 40% returned with Medicaid, and 21% returned with commercial insurance. After insurance expansion, with 55% of patients in each group not returning, the ED visit rate for both the baseline uninsured and insured groups was 15.9 per 100 patient-quarters (relative rate=1.00). This 8% relative increase from baseline in ED visits among the uninsured group was driven primarily by increases in higher-acuity visits. Uninsured patients from high-poverty zip codes (N=34,964 pairs) increased their ED utilization by 15% after insurance expansion, whereas baseline uninsured patients with no comorbidities (N=94,330 pairs) showed a 3% decrease.

CONCLUSION

Insurance expansion in Maryland was associated with a modest relative increase in ED visits among the uninsured, driven by increases in higher-acuity visits. It remains unclear whether insurance coverage helped the uninsured address their unmet medical needs.