2026 US Quality Core Implementation Guide
0.5.0 - cibuild US

2026 US Quality Core Implementation Guide, published by Office of the National Coordinator for Health Information Technology (ONC). This guide is not an authorized publication; it is the continuous build for version 0.5.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/FHIR/us-quality-core/ and changes regularly. See the Directory of published versions

## : Observation example - TTL Representation

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    @prefix fhir: <http://hl7.org/fhir/> .
    @prefix loinc: <https://loinc.org/rdf/> .
    @prefix owl: <http://www.w3.org/2002/07/owl#> .
    @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
    @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
    @prefix sct: <http://snomed.info/id/> .
    @prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

    # - resource -------------------------------------------------------------------

     a fhir:Observation ;
      fhir:nodeRole fhir:treeRoot ;
      fhir:id [ fhir:v "example"] ; #
      fhir:meta [
        ( fhir:profile [
    fhir:v "http://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-simple-observation"^^xsd:anyURI ;
    fhir:l <http://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-simple-observation>     ] )
      ] ; #
      fhir:text [
    fhir:status [ fhir:v "extensions" ] ;
    fhir:div [ fhir:v "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: Observation example</b></p><a name=\"example\"> </a><a name=\"hcexample\"> </a><div style=\"display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%\"><p style=\"margin-bottom: 0px\"/><p style=\"margin-bottom: 0px\">Profile: <a href=\"StructureDefinition-us-quality-core-simple-observation.html\">US Quality Core Simple Observation</a></p></div><p><b>Observation Body Position</b>: <span title=\"Codes:{http://snomed.info/sct 33586001}\">Sitting position (finding)</span></p><p><b>status</b>: Final</p><p><b>category</b>: <span title=\"Codes:{http://terminology.hl7.org/CodeSystem/observation-category vital-signs}\">Vital Signs</span></p><p><b>code</b>: <span title=\"Codes:{http://loinc.org 30350-3}\">Hemoglobin [Mass/volume] in Venous blood</span></p><p><b>subject</b>: <a href=\"Patient-example.html\">Jim Chalmers  Male, DoB: 1974-12-25 ( Social Security number (use: usual, period: 2001-05-06 --&gt; (ongoing)))</a></p><p><b>encounter</b>: <a href=\"Encounter-example.html\">Encounter: identifier = http://example.org/encounters#ENC-20130404-appendicitis; status = finished; class = inpatient encounter (v3 Code System ActCode#IMP); type = Initial hospital inpatient or observation care, per day, for the evaluation and management of a patient, which requires a medically appropriate history and/or examination and high level of medical decision making. When using total time on the date of the encounter for code selection, 75 minutes must be met or exceeded.; period = 2013-04-04 18:00:00-0400 --&gt; 2013-04-06 11:00:00-0400</a></p><p><b>effective</b>: 2013-04-02 10:30:10+0100 --&gt; 2013-04-05 10:30:10+0100</p><p><b>issued</b>: 2013-04-03 15:30:10+0100</p><p><b>performer</b>: <a href=\"Practitioner-example.html\">Practitioner</a></p><p><b>value</b>: 7.2 g/dl<span style=\"background: LightGoldenRodYellow\"> (Details: UCUM  codeg/dL = 'g/dL')</span></p><p><b>interpretation</b>: <span title=\"Codes:{http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation L}\">Below low normal</span></p><p><b>bodySite</b>: <span title=\"Codes:{http://snomed.info/sct 308046002}\">Superficial forearm vein</span></p><p><b>method</b>: <span title=\"Codes:{http://snomed.info/sct 120220003}\">Injection to forearm</span></p><p><b>derivedFrom</b>: <a href=\"Observation-example.html\">Observation Hemoglobin [Mass/volume] in Venous blood</a></p><blockquote><p><b>component</b></p><p><b>code</b>: <span title=\"Codes:{http://loinc.org 8480-6}, {http://snomed.info/sct 271649006}\">Systolic blood pressure</span></p><p><b>value</b>: 107 mmHg<span style=\"background: LightGoldenRodYellow\"> (Details: UCUM  codemm[Hg] = 'mm[Hg]')</span></p><p><b>interpretation</b>: <span title=\"Codes:{http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation N}\">Normal</span></p></blockquote><blockquote><p><b>component</b></p><p><b>code</b>: <span title=\"Codes:{http://loinc.org 8462-4}\">Diastolic blood pressure</span></p><p><b>value</b>: 60 mmHg<span style=\"background: LightGoldenRodYellow\"> (Details: UCUM  codemm[Hg] = 'mm[Hg]')</span></p><p><b>interpretation</b>: <span title=\"Codes:{http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation L}\">Below low normal</span></p></blockquote></div>"^^rdf:XMLLiteral ]
      ] ; #
      fhir:extension ( [
    fhir:url [
    fhir:v "http://hl7.org/fhir/StructureDefinition/observation-bodyPosition"^^xsd:anyURI ;
    fhir:l <http://hl7.org/fhir/StructureDefinition/observation-bodyPosition>     ] ;
    fhir:value [
    a fhir:CodeableConcept ;
          ( fhir:coding [
    a sct:33586001 ;
    fhir:system [
    fhir:v "http://snomed.info/sct"^^xsd:anyURI ;
    fhir:l <http://snomed.info/sct>         ] ;
    fhir:code [ fhir:v "33586001" ] ;
    fhir:display [ fhir:v "Sitting position (finding)" ]       ] )     ]
      ] ) ; #
      fhir:status [ fhir:v "final"] ; #
      fhir:category ( [
        ( fhir:coding [
    fhir:system [
    fhir:v "http://terminology.hl7.org/CodeSystem/observation-category"^^xsd:anyURI ;
    fhir:l <http://terminology.hl7.org/CodeSystem/observation-category>       ] ;
    fhir:code [ fhir:v "vital-signs" ] ;
    fhir:display [ fhir:v "Vital Signs" ]     ] )
      ] ) ; #
      fhir:code [
        ( fhir:coding [
    a loinc:30350-3 ;
    fhir:system [
    fhir:v "http://loinc.org"^^xsd:anyURI ;
    fhir:l <http://loinc.org>       ] ;
    fhir:code [ fhir:v "30350-3" ] ;
    fhir:display [ fhir:v "Hemoglobin [Mass/volume] in Venous blood" ]     ] )
      ] ; #
      fhir:subject [
    fhir:l fhir:Patient/example ;
    fhir:reference [ fhir:v "Patient/example" ]
      ] ; #
      fhir:encounter [
    fhir:l fhir:Encounter/example ;
    fhir:reference [ fhir:v "Encounter/example" ]
      ] ; #
      fhir:effective [
    a fhir:Period ;
    fhir:start [ fhir:v "2013-04-02T10:30:10+01:00"^^xsd:dateTime ] ;
    fhir:end [ fhir:v "2013-04-05T10:30:10+01:00"^^xsd:dateTime ]
      ] ; #
      fhir:issued [ fhir:v "2013-04-03T15:30:10+01:00"^^xsd:dateTime] ; #
      fhir:performer ( [
    fhir:l fhir:Practitioner/example ;
    fhir:reference [ fhir:v "Practitioner/example" ] ;
    fhir:display [ fhir:v "Practitioner" ]
      ] ) ; #
      fhir:value [
    a fhir:Quantity ;
    fhir:value [ fhir:v 7.2 ] ;
    fhir:unit [ fhir:v "g/dl" ] ;
    fhir:system [
    fhir:v "http://unitsofmeasure.org"^^xsd:anyURI ;
    fhir:l <http://unitsofmeasure.org>     ] ;
    fhir:code [ fhir:v "g/dL" ]
      ] ; #
      fhir:interpretation ( [
        ( fhir:coding [
    fhir:system [
    fhir:v "http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation"^^xsd:anyURI ;
    fhir:l <http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation>       ] ;
    fhir:code [ fhir:v "L" ] ;
    fhir:display [ fhir:v "Low" ]     ] ) ;
    fhir:text [ fhir:v "Below low normal" ]
      ] ) ; #
      fhir:bodySite [
        ( fhir:coding [
    a sct:308046002 ;
    fhir:system [
    fhir:v "http://snomed.info/sct"^^xsd:anyURI ;
    fhir:l <http://snomed.info/sct>       ] ;
    fhir:code [ fhir:v "308046002" ] ;
    fhir:display [ fhir:v "Superficial forearm vein" ]     ] )
      ] ; #
      fhir:method [
        ( fhir:coding [
    a sct:120220003 ;
    fhir:system [
    fhir:v "http://snomed.info/sct"^^xsd:anyURI ;
    fhir:l <http://snomed.info/sct>       ] ;
    fhir:code [ fhir:v "120220003" ] ;
    fhir:display [ fhir:v "Injection to forearm" ]     ] )
      ] ; #
      fhir:derivedFrom ( [
    fhir:l fhir:Observation/example ;
    fhir:reference [ fhir:v "Observation/example" ]
      ] ) ; #
      fhir:component ( [
    fhir:code [
          ( fhir:coding [
    a loinc:8480-6 ;
    fhir:system [
    fhir:v "http://loinc.org"^^xsd:anyURI ;
    fhir:l <http://loinc.org>         ] ;
    fhir:code [ fhir:v "8480-6" ] ;
    fhir:display [ fhir:v "Systolic blood pressure" ]       ] [
    a sct:271649006 ;
    fhir:system [
    fhir:v "http://snomed.info/sct"^^xsd:anyURI ;
    fhir:l <http://snomed.info/sct>         ] ;
    fhir:code [ fhir:v "271649006" ] ;
    fhir:display [ fhir:v "Systolic blood pressure" ]       ] )     ] ;
    fhir:value [
    a fhir:Quantity ;
    fhir:value [ fhir:v "107"^^xsd:decimal ] ;
    fhir:unit [ fhir:v "mmHg" ] ;
    fhir:system [
    fhir:v "http://unitsofmeasure.org"^^xsd:anyURI ;
    fhir:l <http://unitsofmeasure.org>       ] ;
    fhir:code [ fhir:v "mm[Hg]" ]     ] ;
        ( fhir:interpretation [
          ( fhir:coding [
    fhir:system [
    fhir:v "http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation"^^xsd:anyURI ;
    fhir:l <http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation>         ] ;
    fhir:code [ fhir:v "N" ] ;
    fhir:display [ fhir:v "Normal" ]       ] ) ;
    fhir:text [ fhir:v "Normal" ]     ] )
      ] [
    fhir:code [
          ( fhir:coding [
    a loinc:8462-4 ;
    fhir:system [
    fhir:v "http://loinc.org"^^xsd:anyURI ;
    fhir:l <http://loinc.org>         ] ;
    fhir:code [ fhir:v "8462-4" ] ;
    fhir:display [ fhir:v "Diastolic blood pressure" ]       ] )     ] ;
    fhir:value [
    a fhir:Quantity ;
    fhir:value [ fhir:v "60"^^xsd:decimal ] ;
    fhir:unit [ fhir:v "mmHg" ] ;
    fhir:system [
    fhir:v "http://unitsofmeasure.org"^^xsd:anyURI ;
    fhir:l <http://unitsofmeasure.org>       ] ;
    fhir:code [ fhir:v "mm[Hg]" ]     ] ;
        ( fhir:interpretation [
          ( fhir:coding [
    fhir:system [
    fhir:v "http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation"^^xsd:anyURI ;
    fhir:l <http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation>         ] ;
    fhir:code [ fhir:v "L" ] ;
    fhir:display [ fhir:v "Low" ]       ] ) ;
    fhir:text [ fhir:v "Below low normal" ]     ] )
      ] ) . #