PS2-56: Building the Virtual Data Warehouse Using Data from a Healthcare Billing System

Background Healthcare utilization data, specifically diagnoses and procedures, can be processed through different administrative systems. Billing data are generated by the care provider while claims data are generated by the payer. These two sources can represent the data content differently and incorporating the data from these systems into the VDW has presented a unique set of challenges. We present options for reconciling these two data sources to create a VDW that includes all patients including those outside of the HMO member realm.