By 2024, the WHO has made significant progress in linking various medical classifications and terminologies to enhance global health interoperability. This includes lossless mapping of MedDRA (Medical Dictionary for Regulatory Activities) to facilitate accurate reporting of drug-related information, embedding medical device nomenclature for consistency across international health systems, and incorporating Orphanet terminology to improve the classification and understanding of rare diseases. Additionally, WHO is establishing approaches for technical collaboration and linkages with the MONDO Disease Ontology to support accurate disease classification, initiating design efforts with LOINC (Logical Observation Identifiers Names and Codes) to link laboratory and clinical observations with interventions, and exploring potential methods and frameworks for collaboration with other terminology systems to enhance comprehensive health information management.