Clinical Quality Language Specification
1.5.3 - Release 1 Errata 2

Clinical Quality Language Specification, published by Clinical Decision Support WG. This guide is not an authorized publication; it is the continuous build for version 1.5.3 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/cql/ and changes regularly. See the Directory of published versions

Binary: Example CMS55v1_QDM Quality Measure ELM in XML

    
<?xml version="1.0" encoding="UTF-8"?>
<library xmlns="urn:hl7-org:elm:r1" xmlns:t="urn:hl7-org:elm-types:r1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:fhir="http://hl7.org/fhir" xmlns:a="urn:hl7-org:cql-annotations:r1">
   <identifier id="CMS55" version="1"/>
   <schemaIdentifier id="urn:hl7-org:elm" version="r1"/>
   <usings>
      <def localIdentifier="System" uri="urn:hl7-org:elm-types:r1"/>
      <def localIdentifier="QDM" uri="urn:healthit-gov:qdm:v5_0_draft" version="5.0"/>
   </usings>
   <parameters>
      <def name="Measurement Period" accessLevel="Public">
         <parameterTypeSpecifier xsi:type="IntervalTypeSpecifier">
            <pointType name="t:DateTime" xsi:type="NamedTypeSpecifier"/>
         </parameterTypeSpecifier>
      </def>
   </parameters>
   <valueSets>
      <def name="Inpatient" id="2.16.840.1.113883.3.666.5.307" accessLevel="Public"/>
      <def name="Emergency Department Visit" id="2.16.840.1.113883.3.117.1.7.1.293" accessLevel="Public"/>
   </valueSets>
   <statements>
      <def name="Patient" context="Patient">
         <expression xsi:type="SingletonFrom">
            <operand xmlns:ns0="urn:healthit-gov:qdm:v5_0_draft" dataType="ns0:Patient" templateId="Patient" xsi:type="Retrieve"/>
         </expression>
      </def>
      <def name="Inpatient Encounters" context="Patient" accessLevel="Public">
         <expression xsi:type="Query">
            <source alias="E">
               <expression xmlns:ns1="urn:healthit-gov:qdm:v5_0_draft" dataType="ns1:EncounterPerformed" templateId="PositiveEncounterPerformed" codeProperty="code" xsi:type="Retrieve">
                  <codes name="Inpatient" xsi:type="ValueSetRef"/>
               </expression>
            </source>
            <where xsi:type="And">
               <operand xsi:type="LessOrEqual">
                  <operand path="lengthOfStay" scope="E" xsi:type="Property"/>
                  <operand value="120" unit="days" xsi:type="Quantity"/>
               </operand>
               <operand xsi:type="In">
                  <operand xsi:type="End">
                     <operand path="relevantPeriod" scope="E" xsi:type="Property"/>
                  </operand>
                  <operand name="Measurement Period" xsi:type="ParameterRef"/>
               </operand>
            </where>
         </expression>
      </def>
      <def name="Emergency Department Encounters" context="Patient" accessLevel="Public">
         <expression xsi:type="Query">
            <source alias="ED">
               <expression xmlns:ns2="urn:healthit-gov:qdm:v5_0_draft" dataType="ns2:EncounterPerformed" templateId="PositiveEncounterPerformed" codeProperty="code" xsi:type="Retrieve">
                  <codes name="Emergency Department Visit" xsi:type="ValueSetRef"/>
               </expression>
            </source>
            <relationship alias="E" xsi:type="With">
               <expression name="Inpatient Encounters" xsi:type="ExpressionRef"/>
               <suchThat xsi:type="In">
                  <operand xsi:type="End">
                     <operand path="relevantPeriod" scope="ED" xsi:type="Property"/>
                  </operand>
                  <operand lowClosed="true" highClosed="false" xsi:type="Interval">
                     <low xsi:type="Subtract">
                        <operand xsi:type="Start">
                           <operand path="relevantPeriod" scope="E" xsi:type="Property"/>
                        </operand>
                        <operand value="1" unit="hour" xsi:type="Quantity"/>
                     </low>
                     <high xsi:type="Start">
                        <operand path="relevantPeriod" scope="E" xsi:type="Property"/>
                     </high>
                  </operand>
               </suchThat>
            </relationship>
         </expression>
      </def>
      <def name="Measure Observation" context="Patient" accessLevel="Public">
         <expression xsi:type="Query">
            <source alias="E">
               <expression name="Emergency Department Encounters" xsi:type="ExpressionRef"/>
            </source>
            <where xsi:type="Not">
               <operand xsi:type="IsNull">
                  <operand path="relevantPeriod" scope="E" xsi:type="Property"/>
               </operand>
            </where>
            <return>
               <expression precision="Minute" xsi:type="DurationBetween">
                  <operand xsi:type="Start">
                     <operand path="locationPeriod" scope="E" xsi:type="Property"/>
                  </operand>
                  <operand xsi:type="End">
                     <operand path="locationPeriod" scope="E" xsi:type="Property"/>
                  </operand>
               </expression>
            </return>
         </expression>
      </def>
      <def name="Measure Score" context="Population" accessLevel="Public">
         <expression xsi:type="Median">
            <source xsi:type="Query">
               <source alias="X">
                  <expression name="Measure Observation" xsi:type="ExpressionRef"/>
               </source>
               <return distinct="false">
                  <expression xsi:type="ToDecimal">
                     <operand name="X" xsi:type="AliasRef"/>
                  </expression>
               </return>
            </source>
         </expression>
      </def>
   </statements>
</library>