There is limited evidence about whether a substance use disorder (SUD) is a barrier to breast cancer screening. Because SUDs are highly prevalent in the USA, it is important to establish whether this patient population is less likely to obtain screening. This retrospective cohort study included 220 227 patients, with 209 132 having no SUD and 11 095 (5.0%) with SUD based on electronic health record data in a multi-state, Midwestern healthcare system (1 January 2018-31 December 2022).
