As the United States becomes more racially and ethnically diverse and draws more students from across the globe, more representative data are needed to understand at-risk and underrepresented populations in higher education, particularly in the science, technology, engineering, and mathematics (STEM) fields. The authors argue that the current reporting standards for the Integrated Postsecondary Education Data System (IPEDS) result in the misrepresentation of racial and ethnic populations in STEM by forcing non-U.S. students into a "master status" category regardless of their racial or ethnic group membership. This study uses data from IPEDS and the American Community Survey to estimate the possible misrepresentation of reported bachelor degree completions by racial and ethnic group and citizenship status in the biological and biomedical sciences and engineering. We found that nearly all of the racial and ethnic groups in IPEDS may be significantly misreported because of the reporting standards for U.S. citizenship. With these findings, various implications are discussed, including higher education decision-making policies; interpretation of academic and social experiences of diverse peoples (race, ethnicity, and nationality); and creation of effective structures for academic success, particularly for students of color, regardless of citizenship.