Disparity in telehealth and emergency department use among Medicaid and commercially insured patients receiving systemic therapy for cancer in Washington State following the COVID-19 Pandemic.

6546 Background: Washington was the first US state to experience the COVID-19 pandemic. Transmission risks and patient fears of visiting oncology practices during its onset resulted in rapid adoption of telehealth services. We hypothesized that the pandemic would widen disparities in oncology practice visits between Medicaid and commercially insured patients, resulting higher rates of emergency department (ED) visits during initial treatment. Methods: Linking Washington State SEER records with Medicaid and commercial insurance enrollment and claims records, we compared adults age <65 with new solid tumor malignancies who received systemic treatment at academic and community oncology practices. Persons starting therapy March – June 2020 (COVID) were compared with those starting therapy March-June 2017-2019 (Pre-COVID). Poisson regressions were used to evaluate differences in oncology practice office visits and telehealth visits. Logistic regressions were used to evaluate the likelihood of at least one ED admission among patients starting systemic therapy pre- and post-COVID. Results: Among patients who met inclusion criteria (652 Commercial, 349 Medicaid), Medicaid enrollees had more advanced disease and more comorbidity versus commercial enrollees. In unadjusted analysis of E&M and telehealth service visit codes, office-based visits fell for both insurance groups (Table) while telehealth service visits (negligible pre-COVID) were higher for commercial versus Medicaid enrollees post-COVID. The proportion of persons with ≥ 1 ED visit during therapy fell for both insurance groups. In Poisson models, Medicaid enrollees had significantly fewer total visits (P=0.001) and fewer telehealth visits (p<0.001) compared commercial enrollees during the COVID period. In the logit models, ED visits trended lower for both groups after COVID (OR 0.53 95% CI 0.279 to 1.008). Among Medicaid enrollees, persons ages 40-49 and breast cancer patients were more likely to visit the ED. Among the commercially insured, persons with 2 or more comorbidities were more likely to visit the ED. The pre-post COVID change in likelihood of an ED visit was not significantly different between insurance groups (p=0.355). Conclusions: In Washington State, the COVID-19 pandemic created a substantial disparity in access to office-based and telehealth care for low-income patients receiving systemic therapy for new cancers. Reduced oncology practice visits among Medicaid patients did not widen existing disparities in utilization of emergency care.[Table: see text]