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"
        }
      ]
    }
  ]
}