Explore the world of Phecodes in this informative conference talk by Lisa Bastarache at the Computational Genomics Summer Institute (CGSI2023). Dive into the principles and applications of Phecodes, including their use in Phenowide Association Studies and phenotype risk scores. Learn about various tools and resources such as the R Package, Fee Web, and Fee Codex. Discover the importance of replicability in biobank data science and understand quality control measures. Gain insights into cross-biobanking phenotyping and the Mom Baby Database. Examine practical examples and best practices for using Phecodes in research with electronic health records, from PheWAS to PheRS.