Example of a clinical gender observation. For a discussion on representing a patient's gender the Patient Resource.

{
  "resourceType" : "Observation",
  "id" : "clinical-gender",
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p><b>Generated Narrative: Observation</b><a name=\"clinical-gender\"> </a></p><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\">Resource Observation &quot;clinical-gender&quot; </p></div><p><b>status</b>: final</p><p><b>category</b>: Social History <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"http://terminology.hl7.org/4.0.0/CodeSystem-observation-category.html\">Observation Category Codes</a>#social-history)</span></p><p><b>code</b>: Gender identity <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://loinc.org/\">LOINC</a>#76691-5)</span></p><p><b>subject</b>: <a href=\"patient-example.html\">Patient/example</a> &quot;Peter CHALMERS&quot;</p><p><b>encounter</b>: <a href=\"encounter-example.html\">Encounter/example</a></p><p><b>effective</b>: 2018-02-01</p><p><b>performer</b>: <a href=\"practitioner-example.html\">Practitioner/example</a> &quot;Adam CAREFUL&quot;</p><p><b>value</b>: Feminism in boy <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://browser.ihtsdotools.org/\">SNOMED CT</a>#191788006 &quot;Feminism in boy (finding)&quot;)</span></p></div>"
  },
  "status" : "final",
  "category" : [{
    "coding" : [{
      "system" : "http://terminology.hl7.org/CodeSystem/observation-category",
      "code" : "social-history",
      "display" : "Social History"
    }]
  }],
  "code" : {
    "coding" : [{
      "system" : "http://loinc.org",
      "code" : "76691-5",
      "display" : "Gender identity"
    }],
    "text" : "Gender identity"
  },
  "subject" : {
    "reference" : "Patient/example"
  },
  "encounter" : {
    "reference" : "Encounter/example"
  },
  "effectiveDateTime" : "2018-02-01",
  "performer" : [{
    "reference" : "Practitioner/example"
  }],
  "valueCodeableConcept" : {
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "191788006",
      "display" : "Feminism in boy (finding)"
    }],
    "text" : "Feminism in boy"
  }
}