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 - JSON Representation

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