The Revalo (formerly GHDN) Staging System utilizes an agile and extensible common data model, applied on-premise or in the cloud, that is patient-centric and includes data such as demographics, encounters & visits, diagnoses, procedures, costs, medications, laboratory test orders & results, vital signs, and extracts from unstructured text. Each individual Staging System ingests, fully de-identifies and normalizes Participant patient data for access by federated queries.