# Patient Age - STARS Implementation Guide v0.5.1

* [**Table of Contents**](toc.md)
* [**Artifacts Summary**](artifacts.md)
* **Patient Age**

## Extension: Patient Age 

| | |
| :--- | :--- |
| *Official URL*:https://starsapi.csiro.au/fhir-ig/stars/StructureDefinition/patient-age | *Version*:0.5.1 |
| Active as of 2025-10-15 | *Computable Name*:PatientAge |

Age of Patient when specimens were taken. You must specify value AND code AND system as per https://hl7.org/fhir/R5/valueset-age-units.html

**Context of Use**

**Usage info**

**Usages:**

* Use this Extension: [CSIRO STARS Patient Profile](StructureDefinition-csiro-stars-patient.md)
* Examples for this Extension: [Bundle/zzzzzzzz-aaaa-zzzz-zzzz-zzzzzzzzaaaa](Bundle-zzzzzzzz-aaaa-zzzz-zzzz-zzzzzzzzaaaa.md)

You can also check for [usages in the FHIR IG Statistics](https://packages2.fhir.org/xig/csiro.stars|current/StructureDefinition/patient-age)

### Formal Views of Extension Content

 [Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work](http://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#structure-definitions). 

 

Other representations of profile: [CSV](StructureDefinition-patient-age.csv), [Excel](StructureDefinition-patient-age.xlsx), [Schematron](StructureDefinition-patient-age.sch) 

#### Constraints



## Resource Content

```json
{
  "resourceType" : "StructureDefinition",
  "id" : "patient-age",
  "extension" : [
    {
      "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics",
      "valueCode" : "can-bind"
    }
  ],
  "url" : "https://starsapi.csiro.au/fhir-ig/stars/StructureDefinition/patient-age",
  "version" : "0.5.1",
  "name" : "PatientAge",
  "title" : "Patient Age",
  "status" : "active",
  "date" : "2025-10-15T22:25:59+11:00",
  "publisher" : "ACDP Informatics CSIRO",
  "contact" : [
    {
      "name" : "ACDP Informatics CSIRO",
      "telecom" : [
        {
          "system" : "url",
          "value" : "https://starsapi.csiro.au"
        },
        {
          "system" : "email",
          "value" : "stars-support@csiro.au"
        }
      ]
    }
  ],
  "description" : "Age of Patient when specimens were taken. You must specify value AND code AND system as per https://hl7.org/fhir/R5/valueset-age-units.html",
  "fhirVersion" : "5.0.0",
  "mapping" : [
    {
      "identity" : "rim",
      "uri" : "http://hl7.org/v3",
      "name" : "RIM Mapping"
    }
  ],
  "kind" : "complex-type",
  "abstract" : false,
  "context" : [
    {
      "type" : "element",
      "expression" : "Patient"
    }
  ],
  "type" : "Extension",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation" : "constraint",
  "differential" : {
    "element" : [
      {
        "id" : "Extension",
        "path" : "Extension",
        "short" : "Patient Age",
        "definition" : "Age of Patient when specimens were taken. You must specify value AND code AND system as per https://hl7.org/fhir/R5/valueset-age-units.html"
      },
      {
        "id" : "Extension.extension",
        "path" : "Extension.extension",
        "max" : "0"
      },
      {
        "id" : "Extension.url",
        "path" : "Extension.url",
        "fixedUri" : "https://starsapi.csiro.au/fhir-ig/stars/StructureDefinition/patient-age"
      },
      {
        "id" : "Extension.value[x]",
        "path" : "Extension.value[x]",
        "short" : "Age of patient when specimen was collected.",
        "definition" : "Age of patient when specimen was collected.",
        "type" : [
          {
            "code" : "Age"
          }
        ]
      }
    ]
  }
}

```
