Patient Demographics Query (PDQ) – What it’s used for: Requesting patient ID‘s from a central patient information server based on patient demographic information. It is used when a system has only demographic data for patient identification.

Example: Hospital A admits Patient Y, who has not been at the hospital before. Hospital A submits a request to the local HIE, based on demographic information such as name, birth date, sex, etc., to obtain the appropriate HIE patient ID for Patient Y.

Synonyms: Patient Demographics Query

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