A data analyzing system for analyzing health-related data of a patient is provided. The system includes a data repository configured to store a semantic patient data model instantiated for each patient by episodic health-related data of the patient loaded from heterogeneous clinical data sources, by non-episodic health-related data of the patient loaded from at least one health monitoring device of the patient, or by a combination thereof. The system also includes a data analyzing unit configured to analyze at least one instantiated patient data model stored in the data repository in response to a query.