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A QDM attribute provides specific detail about a QDM datatype.

Performance/Reporting Period
QDM Definition (QDM Version 5.4):
Coded diagnoses/problems addressed during the encounter. The diagnoses attribute is intended to capture ALL diagnoses, including principal diagnosis. Use of the Encounter, Performed: diagnoses attribute and the Diagnosis datatype is redundant for relating the diagnosis to the Encounter, Performed. The Encounter, Performed: diagnoses syntax is preferred. Referencing the same diagnosis using Encounter, Performed (diagnoses attribute) and Diagnosis (datatype) should only occur if the measure must define a specified length of a prevalence period, e.g., the measure must assure that the diagnoses have been present for at least some defined time period before the encounter, and were addressed during the Encounter.
Last Updated: Oct 17, 2019