RT Journal Article SR Electronic T1 Gender-based differences in physician payments within the fee-for-service system in Ontario: a retrospective, cross-sectional study JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1584 OP E1591 DO 10.1503/cmaj.210437 VO 193 IS 41 A1 Zamir Merali A1 Armaan K. Malhotra A1 Michael Balas A1 Gianni R. Lorello A1 Alana Flexman A1 Tara Kiran A1 Christopher D. Witiw YR 2021 UL http://www.cmaj.ca/content/193/41/E1584.abstract AB Background: Differences in physician income by gender have been described in numerous jurisdictions, but few studies have looked at a Canadian cohort with adjustment for confounders. In this study, we aimed to understand differences in fee-for-service payments to men and women physicians in Ontario.Methods: We conducted a cross-sectional analysis of all Ontario physicians who submitted claims to the Ontario Health Insurance Plan (OHIP) in 2017. For each physician, we gathered demographic information from the College of Physicians and Surgeons of Ontario registry. We compared differences in physician claims between men and women in the entire cohort and within each specialty using multivariable linear regressions, controlling for length of practice, specialty and practice location.Results: We identified a cohort of 30 167 physicians who submitted claims to OHIP in 2017, including 17 992 men and 12 175 women. When controlling for confounding variables in a linear mixed-effects regression model, annual physician claims were $93 930 (95% confidence interval $88 434 to $99 431) higher for men than for women. Women claimed 74% as much as men when adjusting for covariates. This discrepancy was present in nearly all specialty categories. Men claimed more than women throughout their careers, with the greatest gap 10–15 years into practice.Interpretation: We found a gender gap in fee-for-service claims in Ontario, with women claiming less than men overall and in nearly every specialty. Further work is required to understand the root causes of the gender pay gap.