QDM Attribute Performance/Reporting Period 2019 QDM Definition (QDM Version 5.3): The coded diagnosis/problem established after study to be chiefly responsible for occasioning the admission of the patient to the hospital for care. Used By: Encounter, PerformedEncounter, Performed: Emergency Department VisitEncounter, Performed: Encounter InpatientEncounter, Performed: Inpatient EncounterEncounter, Performed: Non-Elective Inpatient Encounter