Implementation Guide
Health Device Data Transfer
Version 0.1.0 - ballot

Specification of health data transfer from devices to DiGA (§ 374a SGB V)

: HDDT rtCGM Data Unavailable Observation Example - XML Representation

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<Observation xmlns="http://hl7.org/fhir">
  <id value="example-cgm-series-data-unavailable"/>
  <meta>
    <profile
             value="https://gematik.de/fhir/hddt/StructureDefinition/hddt-continuous-glucose-measurement"/>
  </meta>
  <status value="preliminary"/>
  <code>
    <coding>
      <system value="http://loinc.org"/>
      <code value="99504-3"/>
      <display value="Glucose [Mass/volume] in Interstitial fluid"/>
    </coding>
  </code>
  <effectivePeriod>
    <start value="2025-09-01T08:00:00+02:00"/>
    <end value="2025-09-01T10:00:00+02:00"/>
  </effectivePeriod>
  <dataAbsentReason>
    <coding>
      <system
              value="http://terminology.hl7.org/CodeSystem/data-absent-reason"/>
      <code value="temp-unknown"/>
      <display value="Temporarily Unknown"/>
    </coding>
  </dataAbsentReason>
  <note>
    <text value="Sensor warm-up phase, values not yet validated."/>
  </note>
  <device>🔗 
    <reference value="DeviceMetric/example-devicemetric-cgm"/>
  </device>
</Observation>