Polygenic risk scores (PRS) show promise but have accuracy disparities across ancestries due to underrepresentation in the existing genomic databases. Here, we outline the initiative of All of Us Research Program in refining PRS and advancing genomic medicine for all. Kidenya and Mboowa discuss the current state of genomic inclusiveness in medicine. They champion the efforts of the All of Us Research Program to broaden diversity in population genomics and reduce disparities across different ancestries.