QA Matching Diagnoses on an Encounter, Performed

Questions and Answers

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Q&A - Matching Diagnoses on an Encounter, Performed

Question

What is the best practice for searching Encounter.diagnoses?

Answer

CQL has a feature that supports implicit conversion from a List<Code> to a Concept, and since there is an overload which takes a Concept, the following expression in QDM 5.3 is valid CQL:

  ["Encounter, Performed": "Inpatient Encounter"] Encounter
    where Encounter.diagnoses in "Atrial Fibrillation"

However, QDM guidance recommends avoiding the use of the Concept type in CQL, so the above pattern is not recommended. Instead, testing for diagnoses within an encounter should use the following approach:

  ["Encounter, Performed": "Inpatient Encounter"] Encounter
    where exists (Encounter.diagnoses Diagnosis where Diagnosis in "Atrial Fibrillation")