Weight stigma is a highly prevalent issue that can impact the accessibility and quality of healthcare for people in larger bodies. Weight stigma also negatively impacts mental, psychosocial, and physical health and can contribute to suboptimal physical activity and nutrition behaviours and even weight gain. To improve healthcare provision for people in larger bodies, it is important to acknowledge the complex process of weight stigmatisation, which operates across interpersonal and structural layers. The aim of this presentation is to draw attention to structural factors that reinforce weight stigma in healthcare. Structural stigma includes the institutional practices, cultural norms, and societal-level conditions that constrain opportunities, resources, and wellbeing for stigmatised populations. In a qualitative interview study, we explored the perspectives of 34 healthcare professionals (general practitioners n=15; dietitians n=15; midwives n=4) about how structural weight stigma could impact the quality of preconception care for larger-bodied women. Seven themes were mapped using framework analyses against three categories of structural stigma (policies and practices; societal level conditions; and cultural norms). Weight-centric policies, weight-based restrictions, lack of information in policies, inadequate physical environments and provider education, and the contributing beliefs, attitudes and responsibilities of healthcare professionals were key factors that contributed to structural weight stigma. Our findings highlight how structural weight stigma is embedded in policies, infrastructure, and cultural norms, contributing to perceived reduced quality of care for people in larger bodies. Existing research also shows that structural factors influence how healthcare providers deliver care to people in larger bodies, shaping not only the quality of care they can provide but also contributing to both implicit and explicit biases that stigmatise individuals. Policy and organisational changes in healthcare systems are required to underpin reductions in structural weight stigma and support healthcare professionals to provide high quality, non-stigmatising care for people in larger bodies.