QRDA is a standard document format for the exchange of eCQM data. QRDA documents contain data extracted from EHRs and other health IT systems, used to exchange eCQM data between systems, serve as the data submission standards for a variety of quality measurement and reporting initiatives, and adopted by the Office of the National Coordinator for Health IT (ONC) as the standard to support both QRDA Category I (individual patient) and QRDA Category III (aggregate) data submission.