ACO Participation Associated With Decreased Spending For Medicare Beneficiaries With Serious Mental Illness

Medicare Accountable Care Organization Treatment of Serious Mental Illness: Associations Between Behavioral Health Integration Activities and Outcomes

OBJECTIVE

Characterize the association between Medicare Accountable Care Organizations' (ACOs) behavioral health integration capability and quality and utilization among adults with serious mental illness (SMI).

BACKGROUND

Controlled research supports the efficacy of integrating physical and mental health care for adults with SMI, yet little is known about the organizations integrating care and associations between integration capability and quality.

METHODS

We surveyed Medicare ACOs (2017-2018 National Survey of ACOs, response rate 69%) and linked responses to 2016-2017 fee-for-service Medicare claims for beneficiaries with SMI. We examined the cross-sectional association between ACO-reported integration capability (tertiles of a 14-item index) and 7 patient-level quality and utilization outcomes. We fit generalized linear models for each outcome as a function of ACO integration capability, adjusting for ACO and beneficiary characteristics.

RESULTS

Study sample included 274,928 beneficiary years (199,910 unique beneficiaries) attributed to 265 Medicare ACOs. ACOs with high behavioral health integration capability (top-tertile) served more dual-eligible beneficiaries (67.8%) than bottom-tertile (63.7%) and middle-tertile ACOs (63.3%). Most beneficiaries received follow-up 30 days after mental health hospitalization and chronic disease monitoring-exceeding national quality benchmarks-but beneficiaries receiving care from top-tertile (vs bottom-tertile) ACOs were modestly less likely to receive follow-up [-2.17 percentage points (pp), P < 0.05], diabetes monitoring (-2.19 pp, P < 0.05), and cardiovascular disease monitoring (-6.07 pp, P < 0.05). Integration capability was not correlated with utilization.

CONCLUSIONS

ACOs serving adults with substantial physical and mental health needs were more likely to report comprehensive integration capability but were not yet meeting the primary care needs of many adults with SMI.

International comparison of hospitalizations and emergency department visits related to mental health conditions across high-income countries before and during the COVID-19 pandemic

OBJECTIVE

To explore variation in rates of acute care utilization for mental health conditions, including hospitalizations and emergency department (ED) visits, across high-income countries before and during the COVID-19 pandemic.

DATA SOURCES AND STUDY SETTING

Administrative patient-level data between 2017 and 2020 of eight high-income countries: Canada, England, Finland, France, New Zealand, Spain, Switzerland, and the United States (US).

STUDY DESIGN

Multi-country retrospective observational study using a federated data approach that evaluated age-sex standardized rates of hospitalizations and ED visits for mental health conditions.

PRINCIPAL FINDINGS

There was significant variation in rates of acute mental health care utilization across countries. Among the subset of four countries with both hospitalization and ED data, the US had the highest pre-COVID-19 combined average annual acute care rate of 1613 episodes/100,000 people (95% CI: 1428, 1797). Finland had the lowest rate of 776 (686, 866). When examining hospitalization rates only, France had the highest rate of inpatient hospitalizations of 988/100,000 (95% CI 858, 1118) while Spain had the lowest at 87/100,000 (95% CI 76, 99). For ED rates for mental health conditions, the US had the highest rate of 958/100,000 (95% CI 861, 1055) while France had the lowest rate with 241/100,000 (95% CI 216, 265). Notable shifts coinciding with the onset of the COVID-19 pandemic were observed including a substitution of care setting in the US from ED to inpatient care, and overall declines in acute care utilization in Canada and France.

CONCLUSION

The study underscores the importance of understanding and addressing variation in acute care utilization for mental health conditions, including the differential effect of COVID-19, across different health care systems. Further research is needed to elucidate the extent to which factors such as workforce capacity, access barriers, financial incentives, COVID-19 preparedness, and community-based care may contribute to these variations.

WHAT IS KNOWN ON THIS TOPIC

Approximately one billion people globally live with a mental health condition, with significant consequences for individuals and societies. Rates of mental health diagnoses vary across high-income countries, with substantial differences in access to effective care. The COVID-19 pandemic has exacerbated mental health challenges globally, with varying impacts across countries.

WHAT THIS STUDY ADDS

This study provides a comprehensive international comparison of hospitalization and emergency department visit rates for mental health conditions across eight high-income countries. It highlights significant variations in acute care utilization patterns, particularly in countries that are more likely to care for people with mental health conditions in emergency departments rather than inpatient facilities The study identifies temporal and cross-country differences in acute care management of mental health conditions coinciding with the onset of the COVID-19 pandemic.

The Impact of Medicaid Accountable Care Organizations on Health Care Utilization, Quality Measures, Health Outcomes and Costs from 2012 to 2023: A Scoping Review

Most of the evidence regarding the success of ACOs is from the Medicare program. This review evaluates the impacts of ACOs within the Medicaid population. We identified 32 relevant studies published between 2012 and 2023 which analyzed the association of Medicaid ACOs and health care utilization (n = 21), quality measures (n = 18), health outcomes (n = 10), and cost reduction (n = 3). The results of our review regarding the effectiveness of Medicaid ACOs are mixed. Significant improvements included increased primary care visits, reduced admissions, and reduced inpatient stays. Cost reductions were reported in a few studies, and savings were largely dependent on length of attribution and years elapsed after ACO implementation. Adopting the ACO model for the Medicaid population brings some different challenges from those with the Medicare population, which may limit its success, particularly given differences in state Medicaid programs.

No Improvement In Mental Health Treatment Or Patient-Reported Outcomes At Medicare ACOs For Depression And Anxiety Disorders

Accountable care organizations (ACOs) have become Medicare's dominant care model because policy makers believe that ACOs will improve the quality and efficiency of care for chronic conditions. Depression and anxiety disorders are the most prevalent and undertreated chronic mental health conditions in Medicare. Yet it is unknown whether ACOs influence treatment and outcomes for these conditions. To explore these questions, this longitudinal study used data from the 2016-19 Medicare Current Beneficiary Survey, linked to validated depression and anxiety symptom instruments, among diagnosed and undiagnosed fee-for-service Medicare patients with these conditions. Among patients not enrolled in ACOs at baseline, those who newly enrolled in ACOs in the following year were 24 percent less likely to have their depression or anxiety treated during the year than patients who remained unenrolled in ACOs, and they saw no relative improvements at twelve months in their depression and anxiety symptoms. Better-designed incentives are needed to motivate Medicare ACOs to improve mental health treatment.

The effects of behavioral health integration in Medicaid managed care on access to mental health and primary care services-Evidence from early adopters

OBJECTIVE

To evaluate the impacts of a transition to an "integrated managed care" model, wherein Medicaid managed care organizations moved from a "carve-out" model to a "carve-in" model integrating the financing of behavioral and physical health care.

DATA SOURCES/STUDY SETTING

Medicaid claims data from Washington State, 2014-2019, supplemented with structured interviews with key stakeholders.

STUDY DESIGN

This mixed-methods study used difference-in-differences models to compare changes in two counties that transitioned to financial integration in 2016 to 10 comparison counties maintaining carve-out models, combined with qualitative analyses of 15 key informant interviews. Quantitative outcomes included binary measures of access to outpatient mental health care, primary care, the emergency department (ED), and inpatient care for mental health conditions.

DATA COLLECTION

Medicaid claims were collected administratively, and interviews were recorded, transcribed, and analyzed using a thematic analysis approach.

PRINCIPAL FINDINGS

The transition to financially integrated care was initially disruptive for behavioral health providers and was associated with a temporary decline in access to outpatient mental health services among enrollees with serious mental illness (SMI), but there were no statistically significant or sustained differences after the first year. Enrollees with SMI also experienced a slight increase in access to primary care (1.8%, 95% CI 1.0%-2.6%), but no sustained statistically significant changes in the use of ED or inpatient services for mental health care. The transition to financially integrated care had relatively little impact on primary care providers, with few changes for enrollees with mild, moderate, or no mental illness.

CONCLUSIONS

Financial integration of behavioral and physical health in Medicaid managed care did not appear to drive clinical transformation and was disruptive to behavioral health providers. States moving towards "carve-in" models may need to incorporate support for practice transformation or financial incentives to achieve the benefits of coordinated mental and physical health care.

The impact of Medicare shared savings program participation on hospital financial performance: An event-study analysis

OBJECTIVE

To evaluate the impact of hospitals' participation in the Medicare Shared Savings Program (MSSP) on their financial performance.

DATA SOURCES

Centers for Medicare & Medicaid Services Hospital Cost Reports and MSSP Accountable Care Organizations (ACO) Provider-Level Research Identifiable File from 2011 to 2018.

STUDY DESIGN

We used an event-study design to estimate the temporal effects of MSSP participation on hospital financial outcomes and compared within-hospital changes over time between MSSP and non-MSSP hospitals while controlling for hospital and year fixed effects and organizational and service-area characteristics. The following financial outcomes were evaluated: outpatient revenue, inpatient revenue, net patient revenue, Medicare revenue, operating margin, inpatient revenue share, Medicare revenue share, and allowance and discount rate.

DATA COLLECTION/EXTRACTION METHODS

Secondary data linked at the hospital level.

PRINCIPAL FINDINGS

Controlling for trends in non-MSSP hospitals, MSSP participation was associated with differential increases in net patient revenue by $3.28 million (p < 0.001), $3.20 million (p < 0.01), and $4.20 million (p < 0.01) in the second, third, and fourth year and beyond after joining MSSP, respectively. Medicare revenue differentially increased by $1.50 million (p < 0.05), $2.24 million (p < 0.05), and $4.47 million (p < 0.05) in the first, second, and fourth year and beyond. Inpatient revenue share differentially increased by 0.29% (p < 0.05) in the second year and 0.44% (p < 0.05) in the fourth year and beyond. Medicare revenue share differentially increased by 0.17% (p < 0.01), 0.25% (p < 0.01), 0.32% (p < 0.01), and 0.41% (p < 0.01) in consecutive years following MSSP participation. MSSP participation was associated with 0.33% (p < 0.05) and 0.39% (p < 0.05) differential reduction in allowance and discount rate in the second and third years.

CONCLUSIONS

MSSP participation was associated with differential increases in net patient revenue, Medicare revenue, inpatient revenue share, and Medicare revenue share, and a differential reduction in allowance and discount rate.