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Open in new tab Download slide OBJECTIVES The STS Thoracic Surgery Practice and Access Task Force - 2019 Workforce Report noted gender-based differences in the income of cardiothoracic surgeons in the United States. We analysed the 2019 Medicare payment data for thoracic and cardiac surgeons to investigate the gender-based payment gap among cardiothoracic surgeons. METHODS The 2019 Medicare Physician and Other Practitioners by Provider and Services data set merged with the Doctors and Clinicians National Downloadable File was utilized to conduct a cross-sectional analysis of gender differences in Medicare payments, numbers of services, unique billing codes, years in practice, Medicare beneficiary age, regional population density (rural-urban commuting area code) and patient panel complexity (hierarchical condition category) for providers. The providers' self-reported gender (women or men) and provider type (thoracic surgery or cardiac surgery) were binarily set according to the Center for Medicare and Medicaid Services standards. Independent analyses were performed with thoracic and cardiac surgeons. We also used the 2013 and 2016 Medicare Physician and Other Practitioners by Provider and Services data sets to analyse the trends in adjusted gender-based payment differences across 2013, 2016 and 2019. RESULTS After controlling for the covariates, women thoracic surgeons received $25,183.50 [95% confidence interval (CI) $16,307.60, $34,059.40] less than the mean Medicare payment than men thoracic surgeons. Likewise, women cardiac surgeons received $20,960 [95% confidence interval (CI) $1,014.80, $40,902.80] less than the mean adjusted Medicare payment than their men counterparts. CONCLUSIONS In 2019, women cardiothoracic surgeons received a significantly lower mean Medicare payment than men cardiothoracic surgeons after controlling for the number of services, unique billing codes, the complexity of the patient panel, years in practice and regional population density. The payment gap between women and men exhibited no statistically significant change over 2013, 2016 and 2019. Future studies are warranted to understand the association between gender representation and the pay gap. [ABSTRACT FROM AUTHOR]