# Extension( ethnic-category) in Patient Resource Json Example [CC profile]

**Category:** [FHIR](https://openhealthhub.org/c/fhir/31)
**Created:** 2019-11-21 15:40 UTC
**Views:** 2270
**Replies:** 4
**URL:** https://openhealthhub.org/t/extension-ethnic-category-in-patient-resource-json-example-cc-profile/2149

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## Post #1 by @Tharma

Hi All,

I am trying to read ethnic-category from extension from the patient fhir message (json) using HAPI Fhir STU3 library. I am unable to get the code from it. Following is the extension sample, 
 "extension":[
      {
         "url":"http://fhir.nhs.net/ValueSet/ethnic-category-1",
         "valueCodeableConcept":{
            "coding":[
               {
                  "system":"http://fhir.nhs.net/ValueSet/ethnic-category-1",
                  "code":"A",
                  "display":"British, Mixed British"
               }
            ],
            "text":"British, Mixed British"
         }
      },
      {
         "url":"careManager",
         "valueReference":{
            "reference":"Practitioner/54w5wwwfasdfd",
            "display":"careManager"
         }
      }
   ],
is it valid content if so please share how can I get the code 'A' from this ?
I tried upto the followign 
patient.getExtensionsByUrl("http://fhir.nhs.net/ValueSet/ethnic-category-1").get(0).getValue() 

thanks in advance

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## Post #2 by @mayfield.g.kev

Your code is nearly there. 

    for (Extension extension : 
     patient.getExtensionsByUrl(“http://fhir.nhs.net/ValueSet/ethnic-category-1”)) 
     {
         if (extension.getValue() instanceof CodeableConcept) {
                   CodeableConcept concept = (CodeableConcept) extension.getValue();
                   // etc
               }
      }


From a UK perspective the extension is wrong but not necessarily invalid though. You can chose to accept it but I'd recommend getting it corrected.

    {
    "extension": [
        {
            // This is the correct Url
            "url": "https://fhir.hl7.org.uk/STU3/CodeSystem/CareConnect-EthnicCategory-1",  
            "valueCodeableConcept": {
                "coding": [
                    {
                        // The system was a ValueSet, it should be a CodeSystem
                        "system": "https://fhir.hl7.org.uk/STU3/CodeSystem/CareConnect-EthnicCategory-1",
                        "code": "A",
                        "display": "British, Mixed British"
                    }
                ],
                "text": "British, Mixed British"
            }
        }
    ]
}

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## Post #3 by @Tharma

Thank you, where  this url and system url (https://fhir.hl7.org.uk/STU3/CodeSystem/CareConnect-EthnicCategory-1) from? when I checked the Care Connect Profile the url has valueSet instead of CodeSystem ? please clarify ?

https://fhir.hl7.org.uk/STU3/StructureDefinition/Extension-CareConnect-EthnicCategory-1

thanks

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## Post #4 by @mayfield.g.kev

Thats a common mistake. This is saying use a code which is defined in this ValueSet

![52|690x213](upload://1aAX1N37xyekIymyAmA7Yx4RYxO.png) 

When you look at the ValueSet, the CodeSystem is listed at the bottom.

![32|690x319](upload://jOkLHoaAiWbhlOvnKnOsxkbcx3w.png) 

I think the way the profile has been created is confusing, it's possibly been done that way because that is how it was done in DSTU2.

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## Post #5 by @mayfield.g.kev

After some comments.

Based on the above, I believing the current spec led to the issue and was wondering if standard FHIR implementation guide would have been better. E.g. 

https://project-wildfyre.github.io/UK-STU3/CareConnect-EthnicCategory-1.html

This has several issues at the mo (I'm experimenting)

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**Canonical:** https://openhealthhub.org/t/extension-ethnic-category-in-patient-resource-json-example-cc-profile/2149
**Original content:** https://openhealthhub.org/t/extension-ethnic-category-in-patient-resource-json-example-cc-profile/2149