Characteristics of hospital and health system initiatives to address social determinants of health in the United States: a scoping review of the peer-reviewed literature.

Background: Despite the incentives and provisions created for hospitals by the US Affordable Care Act related to value-based payment and community health needs assessments, concerns remain regarding the adequacy and distribution of hospital efforts to address SDOH. This scoping review of the peer-reviewed literature identifies the key characteristics of hospital/health system initiatives to address SDOH in the US, to gain insight into the progress and gaps. Methods: PRISMA-ScR criteria were used to inform a scoping review of the literature. The article search was guided by an integrated framework of Healthy People SDOH domains and industry recommended SDOH types for hospitals. Three academic databases were searched for eligible articles from 1 January 2018 to 30 June 2023. Database searches yielded 3,027 articles, of which 70 peer-reviewed articles met the eligibility criteria for the review. Results: Most articles (73%) were published during or after 2020 and 37% were based in Northeast US. More initiatives were undertaken by academic health centers (34%) compared to safety-net facilities (16%). Most (79%) were research initiatives, including clinical trials (40%). Only 34% of all initiatives used the EHR to collect SDOH data. Most initiatives (73%) addressed two or more types of SDOH, e.g., food and housing. A majority (74%) were downstream initiatives to address individual health-related social needs (HRSNs). Only 9% were upstream efforts to address community-level structural SDOH, e.g., housing investments. Most initiatives (74%) involved hot spotting to target HRSNs of high-risk patients, while 26% relied on screening and referral. Most initiatives (60%) relied on internal capacity vs. community partnerships (4%). Health disparities received limited attention (11%). Challenges included implementation issues and limited evidence on the systemic impact and cost savings from interventions. Conclusion: Hospital/health system initiatives have predominantly taken the form of downstream initiatives to address HRSNs through hot-spotting or screening-and-referral. The emphasis on clinical trials coupled with lower use of EHR to collect SDOH data, limits transferability to safety-net facilities. Policymakers must create incentives for hospitals to invest in integrating SDOH data into EHR systems and harnessing community partnerships to address SDOH. Future research is needed on the systemic impact of hospital initiatives to address SDOH.

Association of Medicaid expansion with birth outcomes: evidence from a natural experiment in Texas.

BACKGROUND: Empirical evidence on the effects of Medicaid expansion is mixed and highly state-dependent. The objective of this study is to examine the association of Medicaid expansion with preterm birth and low birth weight, which are linked to a higher risk of infant mortality and chronic health conditions throughout life, providing evidence from a non-expansion state, overall and by race/ethnicity. METHODS: We used the newborn patient records obtained from Texas Public Use Data Files from 2010 to 2019 for hospitals in Texarkana, which is located on the border of Texas and Arkansas, with all of the hospitals serving pregnancy and childbirth patients on the Texas side of the border. We employed difference-in-differences models to estimate the effect of Medicaid expansion on birth outcomes (preterm birth and low birth weight) overall and by race/ethnicity. Newborns from Arkansas (expanded Medicaid in 2014) constituted the treatment group, while those from Texas (did not adopt the expansion) were the control group. We utilized a difference-in-differences event study framework to examine the gradual impact of the Medicaid expansion on birth outcomes. RESULTS: Medicaid expansion was associated with a 1.38-percentage-point decrease (95% confidence interval (CI), 0.09-2.67) in preterm birth overall. Event study results suggest that preterm births decreased gradually over time. Medicaid expansion was associated with a 2.04-percentage-point decrease (95% CI, 0.24-3.85) in preterm birth and a 1.75-percentage-point decrease (95% CI, 0.42-3.08) in low birth weight for White infants. However, Medicaid expansion was not associated with significant changes in birth outcomes for other race/ethnicity groups.  CONCLUSIONS: Our findings suggest that Medicaid expansion in Texas can potentially improve birth outcomes. However, bridging racial disparities in birth outcomes might require further efforts such as promoting preconception and prenatal care, especially among the Black population.

California v. Texas: Avoiding an Antidemocratic Outcome.

The Affordable Care Act ("ACA") contains a section titled "Requirement to Maintain Essential Minimum Coverage." Colloquially known as the Individual Mandate, this section of the Act initially established a monetary penalty for anyone who did not maintain health insurance in a given tax year. But with the passage of the Tax Cuts and Jobs Act, the monetary penalty was reset to zero, inducing opponents of the ACA to mount a legal challenge over the Individual Mandate's constitutionality. As the third major legal challenge to the ACA, California v. Texas saw the Supreme Court punt on the merits and instead decide the case on grounds of Article III standing. But how would the ACA have fared if the Court had in fact reached the merits? Did resetting the Individual Mandate penalty to zero uncloak the provision from the saving construction of Nat'l Fed'n of Indep. Bus. v. Sebelius? This Note posits that, had the Court reached the merits, it would have found the Individual Mandate no longer met the requirements for classification as a tax under the rule relied on in NFIB. Moreover, it argues that the Court would have found the unconstitutional provision to be inseverable from the ACA insofar as it was integral to funding both the novel structure of the reformed healthcare system and the prohibition against insurance carriers denying coverage due to a pre-existing condition. This examination ultimately reveals that an outright repeal of the ACA would have been antidemocratic in the face of current consensus opinion that favors the reform and highlights the impact its abrogation would have had.

Women's Preventive Services Utilization in Illinois in the Aftermath of the ACA and the COVID-19 Pandemic.

This study explores the association between health system changes over the last decade and women's preventive care utilization in Illinois. A cross-sectional analysis using Illinois Behavioral Risk Factor Surveillance System (BRFSS) data from 2012-2020 among women aged 21-75 (n=21,258) examined well-woman visit (WWV) receipt and breast and cervical cancer screening overall and over several time periods. There was an increase in the prevalence of receiving a WWV for Illinois women overall from 2012-2020. However, the overall adjusted prevalence difference was only significant for the 2020 versus 2015-2019 comparison and not for 2015-2019 versus 2012-2014. The COVID-19 pandemic was not associated with a decrease in the prevalence of mammogram use but was manifest for cervical cancer screening, particularly for Black women. Finally, those reporting having a WWV in the past year had a significantly higher prevalence of being up to date with screening compared with those not reporting a WWV.

A Blueprint for U.S. Health Insurance Reform.

The current U.S. health insurance "system" was not deliberately planned and constructed but has emerged piecemeal over the past half-century through a series of incremental and haphazard reforms. That policy history also reveals a clear but unfulfilled societal commitment to providing access to essential health care regardless of resources. To fulfill this obligation, the solution proposed in this article has 2 key elements: 1) universal coverage that is automatic, free, and basic, and 2) the option to buy supplemental coverage in a well-designed market. Such a system could, if desired, be created without raising taxes and without disrupting or changing the delivery of medical care.

Understanding lactation policies and resources across a university system: survey and document review.

BACKGROUND: In the U.S., employees often return to work within 8-12 weeks of giving birth, therefore, it is critical that workplaces provide support for employees combining breastfeeding and work. The Affordable Care Act requires any organization with more than 50 employees to provide a space other than a restroom to express breastmilk and a reasonable amount of time during the workday to do so. States and worksites differ in the implementation of ACA requirements and may or may not provide additional support for employees combining breastfeeding and work. The purpose of this study was to conduct an analysis of the policies and resources available at 26 institutions within a state university system to support breastfeeding when employees return to work after giving birth. METHODS: Survey data was collected from Well-being Liaisons in the human resources departments at each institution. In addition, we conducted a document review of policies and online materials at each institution. We used univariate statistics to summarize survey results and an inductive and deductive thematic analysis to analyze institutional resources available on websites and in policies provided by the liaisons. RESULTS: A total of 18 (65.3%) liaisons participated in the study and revealed an overall lack of familiarity with the policies in place and inconsistencies in the resources offered to breastfeeding employees across the university system. Only half of the participating liaisons reported a formal breastfeeding policy was in place on their campus. From the document review, six major themes were identified: placing the burden on employees, describing pregnancy or postpartum as a "disability," having a university-specific policy, inclusion of break times for breastfeeding, supervisor responsibility, and information on lactation policies. CONCLUSION: The review of each institution's online resources confirmed the survey findings and highlighted the burden placed on employees to discover the available resources and advocate for their needs. This paper provides insight into how institutions support breastfeeding employees and provides implications on strategies to develop policies at universities to improve breastfeeding access for working parents.

Did the Affordable Care Act Promote Racial Equity in Pregnancy-Related Health? A Scoping Review.

In the United States, there are profound and persistent racial and ethnic disparities in pregnancy-related health, emphasizing the need to promote racial health equity through public policy. There is evidence that the Affordable Care Act (ACA) increased health insurance coverage, access to health care, and health care utilization, and may have affected some pregnancy-related health outcomes (eg, preterm delivery). It is unclear, however, whether these impacts on pregnancy-related outcomes were equitably distributed across race and ethnicity. Thus, the objective of this study was to fill that gap by summarizing the peer-reviewed evidence regarding the impact of the ACA on racial and ethnic disparities in pregnancy-related health outcomes. The authors conducted a scoping review following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews (PRISMA-ScR), using broad search terms to identify relevant peer-reviewed literature in PubMed, Web of Science, and EconLit. The authors identified and reviewed n = 21 studies and found that the current literature suggests that the ACA and its components were differentially associated with contraception-related and fertility-related outcomes by race/ethnicity. Literature regarding pregnancy health, birth outcomes, and postpartum health, however, was sparse and mixed, making it difficult to draw conclusions regarding the impact on racial/ethnic disparities in these outcomes. To inform future health policy that reduces racial disparities, additional work is needed to clarify the impacts of contemporary health policy, like the ACA, on racial disparities in pregnancy health, birth outcomes, and postpartum health.

Medicaid expansion and palliative care for advanced-stage liver cancer.

BACKGROUND: Medicaid expansion (ME) has contributed to transforming the United States healthcare system. However, its effect on palliative care of primary liver cancers remains unknown. This study aimed to evaluate the association between ME and the receipt of palliative treatment in advanced-stage liver cancer. METHODS: Patients diagnosed with stage IV hepatocellular carcinoma or intrahepatic cholangiocarcinoma were identified from the National Cancer Database and divided into pre-expansion (2010-2013) and postexpansion (2015-2019) cohorts. Logistic regression identified predictors of palliative treatment. Difference-in-difference (DID) analysis assessed changes in palliative care use between patients living in ME states and patients living in non-ME states. RESULTS: Among 12,516 patients, 4582 (36.6%) were diagnosed before expansion, and 7934 (63.6%) were diagnosed after expansion. Overall, rates of palliative treatment increased after ME (18.1% [pre-expansion] vs 22.3% [postexpansion]; P < .001) and are more pronounced among ME states. Before expansion, only cancer type and education attainment were associated with the receipt of palliative treatment. Conversely, after expansion, race, insurance, location, cancer type, and ME status (odds ratio [OR], 1.23; 95% CI, 1.06-1.44; P = .018) were all associated with palliative care. Interestingly, the odds were higher if treatment involved receipt of pain management (OR, 2.05; 95% CI, 1.23-2.43; P = .006). Adjusted DID analysis confirmed increased rates of palliative treatment among patients living in ME states relative to non-ME states (DID, 4.4%; 95% CI, 1.2-7.7; P = .008); however, racial disparities persist (White, 5.6; 95% CI, 1.4-9.8; P = .009; minority, 2.6; 95% CI, -2.5 to 7.6; P = .333). CONCLUSION: The implementation of ME contributed to increased rates of palliative treatment for patients residing in ME states after expansion. However, racial disparities persist even after ME, resulting in inequitable access to palliative care.

The impact of the affordable care act and Medicaid expansion on colorectal cancer screening: Evidence from the 5th year of Medicaid expansion.

BACKGROUND: Colorectal cancer screening rates remain suboptimal, particularly among low-income populations. Our objective was to evaluate the long-term effects of Medicaid expansion on colorectal cancer screening. DESIGN, SETTING, AND PARTICIPANTS: This cross-sectional study analyzed data from 354,384 individuals aged 50-64 with an income below 400% of the federal poverty level (FPL), who participated in the Behavioral Risk Factors Surveillance System from 2010 to 2018. A difference-in-difference analysis was employed to estimate the effect of Medicaid expansion on colorectal cancer screening. Subgroup analyses were conducted for individuals with income up to 138% of the FPL and those with income between 139% and 400% of the FPL. The effect of Medicaid expansion on colorectal cancer screening was examined during the early, mid, and late expansion periods. MAIN OUTCOMES AND MEASURES: The primary outcome was the likelihood of receiving colorectal cancer screening for low-income adults aged 50-64. RESULTS: Medicaid expansion was associated with a significant 1.7 percentage point increase in colorectal cancer screening rates among adults aged 50-64 with income below 400% of the FPL (p < 0.05). A significant 2.9 percentage point increase in colorectal cancer screening was observed for those with income up to 138% the FPL (p < 0.05), while a 1.5 percentage point increase occurred for individuals with income between 139% and 400% of the FPL. The impact of Medicaid expansion on colorectal cancer screening varied based on income levels and displayed a time lag for newly eligible beneficiaries. CONCLUSIONS: Medicaid expansion was found to be associated with increased colorectal cancer screening rates among low-income individuals aged 50-64. The observed variations in impact based on income levels and the time lag for newly eligible beneficiaries receiving colorectal cancer screening highlight the need for further research and precision public health strategies to maximize the benefits of Medicaid expansion on colorectal cancer screening rates.

Pumps: A Possible Tool to Promote More Equitable Lactation Outcomes.

Pregnant individuals and infants in the US are experiencing rising morbidity and mortality rates. Breastfeeding is a cost-effective intervention associated with a lower risk of health conditions driving dyadic morbidity and mortality, including cardiometabolic disease and sudden infant death. Pregnant individuals and infants from racial/ethnic subgroups facing the highest risk of mortality also have the lowest breastfeeding rates, likely reflective of generational socioeconomic marginalization and its impact on health outcomes. Promoting breastfeeding among groups with the lowest rates could improve the health of dyads with the greatest health risk and facilitate more equitable, person-centered lactation outcomes. Multiple barriers to lactation initiation and duration exist for families who have been socioeconomically marginalized by health and public systems. These include the lack of paid parental leave, increased access to subsidized human milk substitutes, and reduced access to professional and lay breastfeeding expertise. Breast pumps have the potential to mitigate these barriers, making breastfeeding more accessible to all interested dyads. In 2012, The Patient Protection and Affordable Care Act (ACA) greatly expanded access to pumps through the preventative services mandate, with a single pump now available to most US families. Despite their near ubiquitous use among lactating individuals, little research has been conducted on how and when to use pumps appropriately to optimize breastfeeding outcomes. There is a timely and critical need for policy, scholarship, and education around pump use given their widespread provision and potential to promote equity for those families facing the greatest barriers to achieving their personal breastfeeding goals.

Association between Medicaid Expansion and Cutaneous Melanoma Diagnosis and Outcomes: Does Where You Live Make a Difference?

BACKGROUND: Early detection and standardized treatment are crucial for enhancing outcomes for patients with cutaneous melanoma, the commonly diagnosed skin cancer. However, access to quality health care services remains a critical barrier for many patients, particularly the uninsured. Whereas Medicaid expansion (ME) has had a positive impact on some cancers, its specific influence on cutaneous melanoma remains understudied. METHODS: The National Cancer Database identified 87,512 patients 40-64 years of age with a diagnosis of non-metastatic cutaneous melanoma between 2004 and 2017. In this study, patient demographics, disease characteristics, and treatment variables were analyzed, and ME status was determined based on state policies. Standard univariate statistics were used to compare patients with a diagnosis of non-metastatic cutaneous melanoma between ME and non-ME states. The Kaplan-Meier method and log-rank tests were used to evaluate overall survival (OS) between ME and non-ME states. Multivariable Cox regression models were used to examine associations with OS. RESULTS: Overall, 28.6 % (n = 25,031) of the overall cohort was in ME states. The patients in ME states were more likely to be insured, live in neighborhoods with higher median income quartiles, receive treatment at academic/research cancer centers, have lower stages of disease, and receive surgery than the patients in non-ME states. Kaplan-Meier analysis found enhanced 5-year OS for the patients in ME states across all stages. Cox regression showed improved survival in ME states for stage II (hazard ratio [HR], 0.84) and stage III (HR, 0.75) melanoma. CONCLUSIONS: This study underscores the positive association between ME and improved diagnosis, treatment, and outcomes for patients with non-metastatic cutaneous melanoma. These findings advocate for continued efforts to enhance health care accessibility for vulnerable populations.

The Academic Payvider Model: Care and Coverage.

The US health care system has significant room for growth to achieve the Quintuple Aim. Reforming the relationship between payers and providers is pivotal to enhancing value-based care (VBC). The Payvider model, a joint approach to care and coverage rooted in vertical integration, is a potential solution. The authors aimed to investigate academic medical institutions adopting this model, termed Academic Payviders. All Association of American Medical Colleges (AAMC)-member allopathic medical schools were evaluated to identify programs meeting the inclusion criteria of offering both medical care and insurance coverage to patients via partnership with a payer or ownership of, or by, a payer. Twenty-five Academic Payvider systems were identified from 171 total AAMC-member programs. Most programs were founded after 2009 (n = 20), utilized a provider-dominant structural model (n = 17), and offered health plans to patients via Medicare Advantage (n = 23). Passage of the Affordable Care Act, recent trends in health care consolidation, and increased political and financial prioritization of social determinants of health (SDOH) may help to explain the rise of this care and coverage model. The Academic Payvider movement could advance academic medicine toward greater acceptance of VBC via innovations in medical education, resource stewardship in residency, and the establishment of innovative leadership positions at the administrative level.

Impact of Medicaid Expansion on Trauma Patients at Extreme Risk of Mortality: A Time-Series Analysis.

BACKGROUND: The 2014 expansion of Medicaid under the Affordable Care Act (ACA) reshaped healthcare delivery in the United States. This study assessed how Medicaid expansion affected in-hospital mortality in patients with extreme risk of mortality (EROM) from traumatic injuries. METHODS: Data from inpatients aged 18-64 years, registered in the National Inpatient Sample between 2007 and 2020, and identified with trauma-related All-Patient Refined Diagnosis Related Groups (APRDRG) codes, were analyzed. Within this group, a subset of patients was selected based on the APRDRG classification identifying them as at EROM for the principal unit of analysis. The cohort was divided into high-implementation (HIR) and low-implementation (LIR) regions based on Medicaid expansion coverage. In-hospital mortality was assessed using interrupted time-series analysis. Sensitivity analyses considered seasonality, autocorrelation, and exogenous events. RESULTS: Analysis encompassed 70 381 trauma inpatient stays, corresponding to 346 659 patients based on National Inpatient Sample weighting. There was a consistent monthly decline in in-hospital mortality of .08% (95% CI: -.103 to -.048; P < .001) prior to Medicaid expansion, a trend unaffected by expansion. This pattern persisted across both LIR and HIR Medicaid implementation regions. Although Medicaid enrollment increased in HIR, that in LIR remained unchanged. DISCUSSION: Over the study period, the in-hospital mortality among severely injured patients consistently decreased, and this trend was not influenced by Medicaid expansion. The statistical models and results from this study can offer valuable guidance to policymakers and healthcare leaders as they formulate more efficient and effective policies.

Primary Care Physician Network Overlap Between Medicaid and the Patient Protection and Affordable Care Act Marketplace.

This cross-sectional study quantifies Medicaid and the Patient Protection and Affordable Care Act (ACA) Marketplace overlap among primary care physicians.

Differences in Healthcare Utilization in Children with Developmental Disabilities Following Value-Based Care Coordination Policies.

GOAL: To address healthcare spending growth, coordinate care, and improve primary care utilization, a majority of states in the United States have adopted value-based care coordination programs. The objective of this study was to identify changes in national healthcare utilization for children with developmental disabilities (DDs), a high-cost and high-need population, following the broad adoption of value-based care coordination policies. METHODS: This retrospective study included 9,109 children with DDs and used data from 2002-2018 Medical Expenditure Panel Survey. We applied an interrupted time series design approach to compare pre- and post-Affordable Care Act (ACA) care coordination policies concerning healthcare utilization outcomes, including outpatient visits, home provider days, emergency department (ED) visits, inpatient discharge, and inpatient nights of stay. PRINCIPAL FINDINGS: We found statistically significant increases in low-cost care post-ACA, including outpatient visits (5% higher, p < .001) and home provider days (11% higher, p < .001). The study findings also showed a statistically significant increase in inpatient nights of stay post-ACA (4% higher, p = .001). There were no changes in the number of ED and inpatient visits. Overall, broad implementation of care coordination programs was associated with increased utilization of low-cost care without increases in the number of high-cost ED and inpatient visits for children with DDs. Our study also found changes in population composition among children with DDs post-ACA, including increases in Hispanic (16.9% post-ACA vs. 13.4% pre-ACA, p = .006) and non-Hispanic multiracial children (9.1% post-ACA vs. 5.5% pre-ACA, p = .001), a decrease in non-Hispanic Whites (60.2% post-ACA vs. 68.6% pre-ACA, p = .001), more public-only insurance (44.3% post-ACA vs. 35.7% pre-ACA, p = .001), fewer children with DDs from middle-income families (27.4% post-ACA vs. 32.8% pre-ACA, p < .001), and more children with DDs from poor families (28.2% post-ACA vs. 25.1% pre-ACA, p = .043). PRACTICAL APPLICATIONS: These findings highlight the importance of continued support for broad care coordination programs for U.S. children with DDs and potentially others with complex chronic conditions. Policymakers and healthcare leaders might consider improving care transitions from inpatient to community or home settings by overcoming barriers such as payment models and the lack of home care nurses who can manage complex chronic conditions. Healthcare leaders also need to understand and consider the changing population composition when implementing care coordination-related policies. This study provides data regarding trends in hospital and home care utilization and evidence of the effectiveness of care coordination policies before the COVID-19 interruption. These findings apply to current healthcare management because COVID-19 has incentivized home care, which may have a strong potential to minimize high-cost care for people with complex chronic conditions. More research is warranted to continue monitoring care coordination changes over a longer period.

The Impact of the Medicaid Reimbursement Bump on Influenza Vaccination Rates Among US Teens: Evidence from the National Immunization Survey-Teen 2011-2020.

BACKGROUND: Many adolescents do not receive basic preventive care such as influenza vaccinations. The Affordable Care Act (ACA) temporarily increased Medicaid reimbursements for primary care services, including vaccine administration, in 2013 to 2014. The objective of this study is to assess the impact of reimbursement increases on influenza vaccination rates among adolescents with Medicaid. METHODS: This repeated cross-sectional study used a difference-in-difference approach to compare changes in annual influenza vaccination rates for 20,884 adolescents 13 to 17 years old covered by Medicaid with adequate provider-reported data in 18 states with larger extended (>$5, 2013 to 2019) versus larger temporary (2013 to 2014 only) versus smaller reimbursement changes. We used linear probability models with individual-level random effects, adjusting for state and individual characteristics and annual time trends to assess the impact of a Medicaid vaccine administration reimbursement increase on annual influenza vaccination. RESULTS: Mean Medicaid reimbursements for vaccine administration doubled from 2011 to 2013 to 2014 (eg, from $11 to $22 for CPT 90460). States with smaller reimbursement changes had higher mean reimbursements and higher adjusted vaccination rates at baseline (2011) compared with states with larger temporary and extended reimbursement changes. The reimbursement change was not associated with increases in influenza vaccination rates. DISCUSSION: Influenza vaccination rates were low among adolescents with Medicaid throughout the study period, particularly in states with lower Medicaid reimbursement levels before the ACA. CONCLUSION: That reimbursement increases were not associated with higher vaccination rates suggests additional efforts are needed to improve influenza vaccination rates in this population.

Treatment Patterns and Survival Outcomes in Patients With Breast Cancer on Medicaid, Pre- and Post-Expansion.

BACKGROUND: The objective of this study was to evaluate the impact of Medicaid expansion on breast cancer treatment and survival among Medicaid-insured women in Ohio, accounting for the timing of enrollment in Medicaid relative to their cancer diagnosis and post-expansion heterogeneous Medicaid eligibility criteria, thus addressing important limitations in previous studies. METHODS: Using 2011-2017 Ohio Cancer Incidence Surveillance System data linked with Medicaid claims data, we identified women aged 18 to 64 years diagnosed with local-stage or regional-stage breast cancer (n=876 and n=1,957 pre-expansion and post-expansion, respectively). We accounted for women's timing of enrollment in Medicaid relative to their cancer diagnosis, and flagged women post-expansion as Affordable Care Act (ACA) versus non-ACA, based on their income eligibility threshold. Study outcomes included standard treatment based on cancer stage and receipt of lumpectomy, mastectomy, chemotherapy, radiation, hormonal treatment, and/or treatment for HER2-positive tumors; time to treatment initiation (TTI); and overall survival. We conducted multivariable robust Poisson and Cox proportional hazards regression analysis to evaluate the independent associations between Medicaid expansion and our outcomes of interest, adjusting for patient-level and area-level characteristics. RESULTS: Receipt of standard treatment increased from 52.6% pre-expansion to 61.0% post-expansion (63.0% and 59.9% post-expansion in the ACA and non-ACA groups, respectively). Adjusting for potential confounders, including timing of enrollment in Medicaid, being diagnosed in the post-expansion period was associated with a higher probability of receiving standard treatment (adjusted risk ratio, 1.14 [95% CI, 1.06-1.22]) and shorter TTI (adjusted hazard ratio, 1.14 [95% CI, 1.04-1.24]), but not with survival benefits (adjusted hazard ratio, 1.00 [0.80-1.26]). CONCLUSIONS: Medicaid expansion in Ohio was associated with improvements in receipt of standard treatment of breast cancer and shorter TTI but not with improved survival outcomes. Future studies should elucidate the mechanisms at play.