Definition for heart valve replacement service request

{
  "resourceType" : "ActivityDefinition",
  "id" : "heart-valve-replacement",
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p><b>Generated Narrative: ActivityDefinition</b><a name=\"heart-valve-replacement\"> </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 ActivityDefinition &quot;heart-valve-replacement&quot; </p></div><p><b>status</b>: draft</p><p><b>description</b>: Heart valve replacement</p><h3>UseContexts</h3><table class=\"grid\"><tr><td>-</td><td><b>Code</b></td><td><b>Value[x]</b></td></tr><tr><td>*</td><td>Age Range (Details: http://terminology.hl7.org/CodeSystem/usage-context-type code age = 'Age Range', stated as 'null')</td><td>Adult <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (meshb.nlm.nih.gov#D000328)</span></td></tr><tr><td>*</td><td>User Type (Details: http://terminology.hl7.org/CodeSystem/usage-context-type code user = 'User Type', stated as 'null')</td><td>Physician <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://browser.ihtsdotools.org/\">SNOMED CT</a>#309343006)</span></td></tr></table><p><b>purpose</b>: Describes the proposal to perform a Heart Valve replacement.</p><p><b>usage</b>: This activity definition is used as the definition of a service request to perform a heart valve replacement. Elements that apply universally are defined here, while elements that apply to the specific setting of a referral within a particular order set are defined in the order set.</p><p><b>topic</b>: Heart valve replacement <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://browser.ihtsdotools.org/\">SNOMED CT</a>#34068001)</span></p><p><b>kind</b>: ServiceRequest</p><p><b>code</b>: Heart valve replacement <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://browser.ihtsdotools.org/\">SNOMED CT</a>#34068001)</span></p><p><b>timing</b>: Events: Now()</p><h3>Locations</h3><table class=\"grid\"><tr><td>-</td><td><b>Reference</b></td></tr><tr><td>*</td><td><a href=\"location-example.html\">Location/1</a> &quot;South Wing, second floor&quot;</td></tr></table><h3>Participants</h3><table class=\"grid\"><tr><td>-</td><td><b>Type</b></td><td><b>Role</b></td></tr><tr><td>*</td><td>practitioner</td><td>Interventional Cardiology <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (provider-taxonomy#207RI0011X)</span></td></tr></table><p><b>bodySite</b>: Heart valve structure <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://browser.ihtsdotools.org/\">SNOMED CT</a>#17401000)</span></p></div>"
  },
  "status" : "draft",
  "description" : "Heart valve replacement",
  "useContext" : [{
    "code" : {
      "system" : "http://terminology.hl7.org/CodeSystem/usage-context-type",
      "code" : "age"
    },
    "valueCodeableConcept" : {
      "coding" : [{
        "system" : "https://meshb.nlm.nih.gov",
        "code" : "D000328",
        "display" : "Adult"
      }]
    }
  },
  {
    "code" : {
      "system" : "http://terminology.hl7.org/CodeSystem/usage-context-type",
      "code" : "user"
    },
    "valueCodeableConcept" : {
      "coding" : [{
        "system" : "http://snomed.info/sct",
        "code" : "309343006",
        "display" : "Physician"
      }]
    }
  }],
  "purpose" : "Describes the proposal to perform a Heart Valve replacement.",
  "usage" : "This activity definition is used as the definition of a service request to perform a heart valve replacement. Elements that apply universally are defined here, while elements that apply to the specific setting of a referral within a particular order set are defined in the order set.",
  "topic" : [{
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "34068001",
      "display" : "Heart valve replacement"
    }]
  }],
  "kind" : "ServiceRequest",
  "code" : {
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "34068001",
      "display" : "Heart valve replacement"
    }]
  },
  "timingTiming" : {
    "_event" : [{
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/cqf-expression",
        "valueExpression" : {
          "language" : "text/cql",
          "expression" : "Now()"
        }
      }]
    }]
  },
  "location" : {
    "reference" : {
      "reference" : "Location/1"
    }
  },
  "participant" : [{
    "type" : "practitioner",
    "role" : {
      "coding" : [{
        "system" : "http://nucc.org/provider-taxonomy",
        "code" : "207RI0011X",
        "display" : "Interventional Cardiology"
      }],
      "text" : "Interventional Cardiology"
    }
  }],
  "bodySite" : [{
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "17401000",
      "display" : "Heart valve structure"
    }]
  }]
}