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Added Snomed CT AU guidance #866

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Added Snomed CT AU guidance #866

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SCT AU guidance
mjosborne1 Aug 12, 2024
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Merge branch 'master' into ft-snomedct-guidance
mjosborne1 Sep 13, 2024
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SNOMED CT AU should be expnded to Australian Edition
mjosborne1 Sep 17, 2024
67144c9
Modifications per feedback from Jaimee
mjosborne1 Sep 17, 2024
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55 changes: 55 additions & 0 deletions input/pagecontent/generalguidance.md
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Expand Up @@ -44,6 +44,61 @@ The following FMM levels are defined:

Reference should also be made to [Version Management Policy](http://hl7.org/fhir/R4/versions.html).

### SNOMED CT-AU
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[SNOMED CT](https://snomed.info/sct) (Systematized Nomenclature of Medicine – Clinical Terms) is a comprehensive clinical terminology widely used in healthcare to support the electronic exchange of clinical health information.
In Australia, SNOMED CT-AU extends SNOMED CT for recording structured clinical data in health
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@JayMurdoch JayMurdoch Sep 17, 2024 •
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Consider phrasing of the definition of SNOMED CT-AU to be more general, and not specific to health record. Eg

"In Australia, SNOMED CT Australian Edition (SNOMED CT-AU) extends SNOMED CT with local variations and customisation relevant to the Australian healthcare community."

https://www.healthterminologies.gov.au/understanding-clinical-terminology-landing/what-is-snomed-ct-and-amt/

records in Australian conditions. Many SNOMED CT-AU value sets have already been developed and published by the National Clinical Terminology Service [NCTS](https://www.healthterminologies.gov.au).
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@JayMurdoch JayMurdoch Sep 17, 2024 •
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Suggest changing link to NCTS as "[National Clinical Terminology Service](https://www.healthterminologies.gov.au) (NCTS)."

These nationally agreed and published value sets are maximal in nature to support reuse across multiple use cases and support the breadth of the ecosystem to enable interoperability.

#### SNOMED CT Version Options
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While options are listed, no guidance is provided as to why one should be selected over another. Consider inclusion of guidance - eg option two and three enable validation of AU codes.


1. Using only the system http://snomed.info/sct refers to an unspecified edition and version of SNOMED CT. For example:

~~~
"code": {
"coding": [
{
"system": "http://snomed.info/sct,
"code": "322236009",
"display": "Paracetamol 500 mg oral tablet"
}
],
"text": "paracetamol 500 mg tablet"
}
~~~

1. Using the system *plus* the AU extension identifier `http://snomed.info/sct/32506021000036107` denotes using an unspecified version of the Australian edition of SNOMED CT (SNOMED CT-AU). For example:

~~~
"code": {
"coding": [
{
"system": "http://snomed.info/sct,
"version": "http://snomed.info/sct/32506021000036107",
"code": "322236009",
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While still a valid code in AU extension, is the intention of this example to show a code valid in the AU extension only? If so, change code and display to MPUU concept 23628011000036109|paracetamol 500 mg tablet|.

"display": "Paracetamol 500 mg oral tablet"
}
],
"text": "paracetamol 500 mg tablet"
}
~~~

1. Using the system *plus* the AU extension identifier, *plus* a version denotes using a specific version of SNOMED CT-AU `http://snomed.info/sct/32506021000036107/version/20240531`. For example:

~~~
"code": {
"coding": [
{
"system": "http://snomed.info/sct,
"version": "http://snomed.info/sct/32506021000036107/version/20240531",
"code": "23628011000036109",
"display": "paracetamol 500 mg tablet"
}
],
"text": "paracetamol 500 mg tablet"
}
~~~

### Business Identifiers

["Business" identifiers](http://hl7.org/fhir/R4/resource.html#identifiers) are used extensively to consistently identify real world entities across systems, contexts of use, and other formats (e.g. HL7 v2 , CDA , XDS, and many more).
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