Real-world encounter example (with primaryDiagnosis extension added)

{
  "resourceType": "Encounter",
  "id": "f202",
  "text": {
    "status": "generated",
    "div": "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p><b>Generated Narrative with Details</b></p><p><b>id</b>: f202</p><p><b>identifier</b>: Encounter_Roel_20130128 (TEMP)</p><p><b>status</b>: finished</p><p><b>class</b>: ambulatory (Details: http://hl7.org/fhir/v3/ActCode code AMB = 'ambulatory', stated as 'ambulatory')</p><p><b>type</b>: Chemotherapy <span>(Details : {SNOMED CT code '367336001' = 'Chemotherapy', given as 'Chemotherapy'})</span></p><p><b>priority</b>: Urgent <span>(Details : {SNOMED CT code '103391001' = 'Urgency', given as 'Urgent'})</span></p><p><b>subject</b>: <a>Roel</a></p><h3>Participants</h3><table><tr><td>-</td><td><b>Individual</b></td></tr><tr><td>*</td><td><a>Practitioner/f201</a></td></tr></table><p><b>length</b>: 56 minutes<span> (Details: UCUM code min = 'min')</span></p><p><b>reason</b>: The patient is treated for a tumor. <span>(Details )</span></p><h3>Diagnoses</h3><table><tr><td>-</td><td><b>Condition</b></td><td><b>Role</b></td><td><b>Rank</b></td></tr><tr><td>*</td><td>Complications from Roel's TPF chemotherapy on January 28th, 2013</td><td>Admission diagnosis <span>(Details : {http://hl7.org/fhir/diagnosis-role code 'AD' = 'Admission diagnosis', given as 'Admission diagnosis'})</span></td><td>1</td></tr></table><p><b>serviceProvider</b>: <a>Organization/f201</a></p></div>"

  "resourceType" : "Encounter",
  "id" : "f202",
  "identifier" : [{
    "use" : "temp",
    "value" : "Encounter_Roel_20130128"
  }],
  "status" : "completed",
  "class" : [{
    "coding" : [{
      "system" : "http://terminology.hl7.org/CodeSystem/v3-ActCode",
      "code" : "AMB",
      "display" : "ambulatory"
    }]
  }],
  "priority" : {
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "103391001",
      "display" : "Urgent"
    }]

  },
  "identifier": [
    {
      "use": "temp",
      "value": "Encounter_Roel_20130128"
    }
  ],
  "status": "finished",
  "class": {
    "system": "http://hl7.org/fhir/v3/ActCode",
    "code": "AMB",
    "display": "ambulatory"

  "type" : [{
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "367336001",
      "display" : "Chemotherapy"
    }]
  }],
  "subject" : {
    "reference" : "Patient/f201",
    "display" : "Roel"

  },
  "type": [
    {
      "coding": [
        {
          "system": "http://snomed.info/sct",
          "code": "367336001",
          "display": "Chemotherapy"
        }
      ]
    }
  ],
  "priority": {
    "coding": [
      {
        "system": "http://snomed.info/sct",
        "code": "103391001",
        "display": "Urgent"
      }
    ]

  "serviceProvider" : {
    "reference" : "Organization/f201"

  },
  "subject": {
    "reference": "Patient/f201",
    "display": "Roel"

  "participant" : [{
    "actor" : {
      "reference" : "Practitioner/f201"
    }
  }],
  "length" : {
    "value" : 56,
    "unit" : "minutes",
    "system" : "http://unitsofmeasure.org",
    "code" : "min"

  },
  "participant": [
    {
      "individual": {
        "reference": "Practitioner/f201"

  "reason" : [{
    "value" : [{
      "concept" : {
        "text" : "The patient is treated for a tumor."

      }
    }
  ],
  "length": {
    "value": 56,
    "unit": "minutes",
    "system": "http://unitsofmeasure.org",
    "code": "min"

    }]
  }],
  "diagnosis" : [{
    "condition" : [{
      "concept" : {
        "text" : "Complications from Roel's TPF chemotherapy on January 28th, 2013"
      }
    }],
    "use" : [{
      "coding" : [{
        "system" : "http://terminology.hl7.org/CodeSystem/diagnosis-role",
        "code" : "AD",
        "display" : "Admission diagnosis"
      }]
    }]

  },
  "reason": [
    {
      "extension": [
        {
          "url": "http://hl7.org/fhir/StructureDefinition/encounter-primaryDiagnosis",
          "valuePositiveInt": 2
        }
      ],
      "text": "The patient is treated for a tumor."
    }
  ],
  "diagnosis": [
    {
      "condition": {
        "display": "Complications from Roel's TPF chemotherapy on January 28th, 2013"
      },
      "role": {
        "coding": [
          {
            "system": "http://hl7.org/fhir/diagnosis-role",
            "code": "AD",
            "display": "Admission diagnosis"
          }
        ]
      },
      "rank": 1
    }
  ],
  "serviceProvider": {
    "reference": "Organization/f201"
  }

  {
    "condition" : [{
      "concept" : {
        "text" : "The patient is treated for a tumor"
      }
    }],
    "use" : [{
      "coding" : [{
        "system" : "http://terminology.hl7.org/CodeSystem/diagnosis-role",
        "code" : "CC",
        "display" : "Chief complaint"
      }]
    }]
  }]

}