The DTR launch page has been partially updated but still needs examples to reflect other changes that have been made. Something along the lines of:

The context provided to DTR will be part of the coverage-information extension written by the CRD service onto the related resource. For example, the launch context to DTR following an order-sign should look like:

{ "access_token":"secret-xyz", "patient":"123", "fhirContext":[\{"reference":"ServiceRequest/123"}

]

}

 

And within that service request the DTR app can find the coverage and the questionnaire canonical:

{

  "resourceType": "ServiceRequest",

  "id": "ekvKP44x8eGUDxCkel5XOy7jgYtdj5AQZ0CsaM5iI8F03",

  "extension": [

    

{       "valueBoolean": true,       "url": [http://open.epic.com/FHIR/StructureDefinition/extension/is-scannable-order]     }

,

    {

      "extension": [

        {

          "valueCoding": 

{             "system": [http://hl7.org/fhir/us/davinci-crd/CodeSystem/coverageGuidance],             "code": "clinical"           }

,

          "url": "coverageInfo"

        },

        {

          "valueReference": 

{             "reference": "Coverage/example-coverage-id"           }

,

          "url": "coverage"

        },

        

{           "valueDate": "2023-05-01",           "url": "date"         }

,

        

{           "valueString": "example-trace-number-123",           "url": "identifier"         }

,

        

{           "valueCanonical": [http://example.org/sdh/dtr/aslp/Questionnaire/ASLPA1],           "url": "questionnaire"         }

      ],

      "url": http://hl7.org/fhir/us/davinci-crd/StructureDefinition/ext-coverage-information

    }

  ],