Abstract 811: Impact of Medicaid eligibility expansion to adults regardless of immigration status on health insurance access among Latina patients

Abstract Background: Disparities in the receipt of cancer screening and preventive services are strongly associated with health insurance status. Even after federal- and state-wide initiatives to boost access to health insurance such as the Patient Protection and Affordable Care Act (ACA) Medicaid Expansion to all individuals earning ≤138% of the federal poverty level (FPL) and nationwide individual health insurance marketplaces, Latino populations continue to have the highest uninsured rate of any racial or ethnic group in the US, with 17% of Latinos remaining uninsured compared to 5% of non-Hispanic white peers. In 2021, California and Oregon states amended their respective Medicaid program to expand eligibility to adults regardless of immigration status; which could reduce access disparities for patients from Latino communities. This study shows preliminary results of changes in health insurance status among Latina patients (who have multiple cancer prevention services recommended in middle age) receiving care in community health centers. Methods: A retrospective cohort study of Latina, non-Hispanic Black, and non-Hispanic white women ages 50-64 years receiving primary care from 382 community health clinics in California and Oregon. Using 2018, 2019, 2021, and 2022 electronic health record data, we estimated monthly rates of insured-type visits per 100 visits. We compared rates pre- and post-Medicaid eligibility expansion, both within and between race and ethnicity groups. Reported estimates were derived from generalized estimating equations Poisson regression, clustered on clinic, and adjusted for clinic-level demographics. Results: Of 41, 960 patients, over half (53%) were Latina, most of whom (83%) preferred Spanish language communication. Latina patients had more uninsured visits pre-Medicaid eligibility expansion than did non-Hispanic Black and white patients (Rate: 27% versus 5% and 4%, respectively). All racial and ethnic groups experienced a decrease in uninsured visit rates, and this change was similar for all groups Difference-in-difference Latina versus Black patients: 0. 77 (95% CI 0. 55, 10. 7) and versus white patients: 1. 02 (95% CI 0. 89, 1. 17). Overall rates of Medicaid-insured visits increased only for Latina patients pre-to-post Relative Rate=1. 06 (95% CI: 1. 03-1. 10). Both non-Hispanic Black and white patients experienced a drop in Medicaid-insured visits. Only Black patients experienced a significant decline in private-insured visits pre-to-post RR=0. 79 (95% CI: 0. 70-0. 89). Conclusion: These early results suggest an uptake of Medicaid-paid visits among Latina patients. This increase in healthcare coverage for Latina patients could significantly reduce disparities in access to primary care and especially in cancer preventive care. Citation Format: Nathalie Huguet, Jorge Kaufmann, Heather Holderness, Margaret Vieira, Gretchen Mertes, Jackilen Shannon, John Heintzman. Impact of Medicaid eligibility expansion to adults regardless of immigration status on health insurance access among Latina patients abstract. In: Proceedings of the American Association for Cancer Research Annual Meeting 2024; Part 1 (Regular Abstracts) ; 2024 Apr 5-10; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2024;84 (6Suppl): Abstract nr 811.