Abstract: Techniques for patient data management include obtaining medical history data of patients from a database, the medical history data including a history of one or more diagnosis events, one or more treatment events, and a clinical outcome event for each patient of the patients. For each patient, based on the medical history data, a computing system generates a patient pathway that includes a graph including nodes of one or more diagnosis events, the one or more treatment events, and the clinical outcome event. The computing system receives, via an interface, one or more criteria to select a subset of the patient pathways of the patients. The computing system selects, based on the one or more criteria, graphs representing the subset of the patient pathways. The computing system aggregates the subset of the patient pathways into a merged graph. The computing system displays the merged graph in the interface.