<b>Background: </b>The rising prevalence of diabetes mellitus and its adverse effects on pregnancy outcomes have made pre-pregnancy care (PPC) a critical component of diabetes management among women of reproductive age. Diabetes poses significant risks during pregnancy, but PPC provides an opportunity to prevent complications. Despite these benefits, Nigerian women of childbearing-age living with diabetes still miss out on these advantages due to poorly defined and imperfect integration of PPC into the country’s healthcare system by Health Birth professionals (HBPs). Therefore, their understanding of PPC and the integration of PPC into routine diabetes management practices for childbearing women is essential. The study, therefore, aims to explore HBPs’ provision of PPC for women with pre-existing diabetes in Lagos, Nigeria. <b>Methodology: </b>A qualitative exploratory research design was conducted at two tertiary health institutions in Lagos. A total of 20 participants were purposively selected among doctors and nurse/midwives. The data collected through in-depth semi-structured interviews were transcribed verbatim and analyzed thematically. The trustworthiness of this study was established following the criteria of trustworthiness (credibility, dependability, transferability, and conformability), authenticity was added based on the research worldview. <b>Result:</b> Five themes and eleven subthemes emerged from the analysis. The main themes were clinical importance of PPC for women with diabetes, pregnancy-intention screening for diabetic women, PPC as standard care practice for women with diabetes, raising awareness of PPC, and the enablers of PPC provision. <b>Conclusion:</b> The study emphasized the clinical significance of PPC for women with diabetes; the need for pregnancy-intention screening among diabetic women; the need to make PPC a standard of care for women with diabetes; the importance of raising awareness; and the enablers of PPC. The study highlighted the significance of PPC and the factors that would facilitate its integration PPC into Nigeria's healthcare system. The provision of PPC for women of childbearing potential living with diabetes, as it is key to improving obstetric outcomes and reducing the risks associated with diabetes in pregnancy. It would also be beneficial for leaders at various levels of healthcare institutions to seek the necessary regulatory approvals from the Nigerian government to establish PPC.