National Patterns of Biomarker Testing in Colorectal, Lung, and Prostate Cancers: Insights From the NIH <i>All of Us</i> Research Program

Despite national guidelines, biomarker testing remains underutilized and unevenly distributed across sociodemographic groups. These findings should be interpreted as exploratory, reflecting the fidelity of structured electronic health record (EHR) documentation rather than definitive utilization. Leveraging the scale and diversity of <i>All of Us</i> highlights both equity gaps and documentation limitations, positioning the program as a valuable platform for hypothesis generation in precision oncology.