Converting your data to FHIR for Azure API for FHIR

מאמר
09/27/2023

Important

Azure API for FHIR will be retired on September 30, 2026. Follow the migration strategies to transition to Azure Health Data Services FHIR® service by that date. Due to the retirement of Azure API for FHIR, new deployments won't be allowed beginning April 1, 2025. Azure Health Data Services FHIR service is the evolved version of Azure API for FHIR that enables customers to manage FHIR, DICOM, and MedTech services with integrations into other Azure services.

The $convert-data custom endpoint in the FHIR® service is meant for data conversion from different data types to FHIR. It uses the Liquid template engine and the templates from the FHIR Converter project as the default templates. You can customize these conversion templates as needed.

Currently the $convert-data custom endpoint supports four types of data conversion:

Origin Data Format	Destination Data Format
C-CDA	FHIR
HL7v2	FHIR
JSON	FHIR
FHIR STU3	FHIR R4

Note

The $convert-data endpoint can be used as a component within an export, transform, load (ETL) pipeline for the conversion of raw healthcare data from legacy formats into FHIR format. However, it is not itself an ETL pipeline. We recommend you use an ETL engine such as Logic Apps or Azure Data Factory for a complete workflow in preparing your FHIR data to be persisted into the FHIR server. The workflow might include: data reading and ingestion, data validation, making $convert-data API calls, data pre/post-processing, data enrichment, and data de-duplication.

Use the $convert-data endpoint

The $convert-data operation is integrated into the FHIR service to run as part of the service. After enabling $convert-data in your server, you can make API calls to the server to convert your data into FHIR using https://<<FHIR service base URL>>/$convert-data.

Parameter Resource

$convert-data takes a Parameter resource in the request body as described in the following table. In the API call request body, you would include the following parameters:

Parameter Name	Description	Accepted values
inputData	Data to be converted.	For `Hl7v2`: string For `Ccda`: XML For `Json`: JSON For `FHIR STU3`: JSON
inputDataType	Data type of input.	`HL7v2`, `Ccda`, `Json`, `Fhir`
templateCollectionReference	Reference to an OCI image template collection on Azure Container Registry (ACR). It's the image containing Liquid templates to use for conversion. It can be a reference either to the default templates or a custom template image that is registered within the FHIR service. See the following to learn about customizing the templates, hosting those on ACR, and registering to the FHIR service.	For default/sample templates: HL7v2 templates: `microsofthealth/fhirconverter:default` `microsofthealth/hl7v2templates:default` C-CDA templates: `microsofthealth/ccdatemplates:default` JSON templates: `microsofthealth/jsontemplates:default` FHIR STU3 templates: `microsofthealth/stu3tor4templates:default` For custom templates: <RegistryServer>/<imageName>@<imageDigest>, <RegistryServer>/<imageName>:<imageTag>
rootTemplate	The root template to use while transforming the data.	For HL7v2: "ADT_A01", "ADT_A02", "ADT_A03", "ADT_A04", "ADT_A05", "ADT_A08", "ADT_A11", "ADT_A13", "ADT_A14", "ADT_A15", "ADT_A16", "ADT_A25", "ADT_A26", "ADT_A27", "ADT_A28", "ADT_A29", "ADT_A31", "ADT_A47", "ADT_A60", "OML_O21", "ORU_R01", "ORM_O01", "VXU_V04", "SIU_S12", "SIU_S13", "SIU_S14", "SIU_S15", "SIU_S16", "SIU_S17", "SIU_S26", "MDM_T01", "MDM_T02" For C-CDA: "CCD", "ConsultationNote", "DischargeSummary", "HistoryandPhysical", "OperativeNote", "ProcedureNote", "ProgressNote", "ReferralNote", "TransferSummary" For JSON: "ExamplePatient", "Stu3ChargeItem" FHIR STU3": STU3 Resource, for example Name, "Patient", "Observation", "Organization".

Note

FHIR STU3 to R4 templates are "diff" Liquid templates that provide mappings of field differences only between STU3 resource and its equivalent resource in FHIR R4 standard. Some of the STU3 resources are renamed or removed from R4. Refer to Resource differences and constraints for STU3 to R4 conversion.

Note

JSON templates are sample templates for use, not "default" templates that adhere to any pre-defined JSON message types. JSON doesn't have standardized message types, unlike HL7v2 messages or C-CDA documents. Instead of default templates, we provide you with some sample templates that you can use as a starting guide for your own customized templates.

Warning

Default templates are released under the MIT License and are not supported by Microsoft Support.

Default templates are only provided to help you get started. They may get updated when we update versions of the Azure API for FHIR. You must verify the conversion behavior and host your own copy of templates on an Azure Container Registry, register those to the Azure API for FHIR to use in your API calls. This is necessary for consistent data conversion behavior across different versions of Azure API for FHIR.

Sample Request

{
    "resourceType": "Parameters",
    "parameter": [
        {
            "name": "inputData",
            "valueString": "MSH|^~\\&|SIMHOSP|SFAC|RAPP|RFAC|20200508131015||ADT^A01|517|T|2.3|||AL||44|ASCII\nEVN|A01|20200508131015|||C005^Whittingham^Sylvia^^^Dr^^^DRNBR^D^^^ORGDR|\nPID|1|3735064194^^^SIMULATOR MRN^MRN|3735064194^^^SIMULATOR MRN^MRN~2021051528^^^NHSNBR^NHSNMBR||Kinmonth^Joanna^Chelsea^^Ms^^D||19870624000000|F|||89 Transaction House^Handmaiden Street^Wembley^^FV75 4GJ^GBR^HOME||020 3614 5541^PRN|||||||||C^White - Other^^^||||||||\nPD1|||FAMILY PRACTICE^^12345|\nPV1|1|I|OtherWard^MainRoom^Bed 183^Simulated Hospital^^BED^Main Building^4|28b|||C005^Whittingham^Sylvia^^^Dr^^^DRNBR^D^^^ORGDR|||CAR|||||||||16094728916771313876^^^^visitid||||||||||||||||||||||ARRIVED|||20200508131015||"
        },
        {
            "name": "inputDataType",
            "valueString": "Hl7v2"
        },
        {
            "name": "templateCollectionReference",
            "valueString": "microsofthealth/fhirconverter:default"
        },
        {
            "name": "rootTemplate",
            "valueString": "ADT_A01"
        }
    ]
}

Sample Response

{
  "resourceType": "Bundle",
  "type": "transaction",
  "entry": [
    {
      "fullUrl": "urn:uuid:9d697ec3-48c3-3e17-db6a-29a1765e22c6",
      "resource": {
        "resourceType": "Patient",
        "id": "9d697ec3-48c3-3e17-db6a-29a1765e22c6",
        ...
        ...
      "request": {
        "method": "PUT",
        "url": "Location/50becdb5-ff56-56c6-40a1-6d554dca80f0"
      }
    }
  ]
}

Customize templates

You can use the FHIR Converter extension for Visual Studio Code to customize the templates as per your needs. The extension provides an interactive editing experience, and makes it easy to download Microsoft-published templates and sample data. Refer to the documentation in the extension for more details.

Note

The FHIR Converter extension for Visual Studio Code is available for HL7v2, C-CDA and JSON Liquid templates. FHIR STU3 to R4 Liquid templates are currently not supported.

Host and use templates

It's recommended that you host your own copy of templates on ACR. There are four steps involved in hosting your own copy of templates and using those in the $convert-data operation:

Push the templates to your Azure Container Registry.
Enable Managed Identity on your Azure API for FHIR instance.
Provide access of the ACR to the Azure API for FHIR Managed Identity.
Register the ACR servers in the Azure API for FHIR.
Optionally configure ACR firewall for secure access.

Push templates to Azure Container Registry

After creating an ACR instance, you can use the FHIR Converter: Push Templates command in the FHIR Converter extension to push the customized templates to the ACR. Alternatively, you can use the Template Management CLI tool.

Enable Managed Identity on Azure API for FHIR

Browse to your instance of Azure API for FHIR service in the Azure portal, and then select the Identity blade. Change the status to On to enable managed identity in Azure API for FHIR.

Provide access of the ACR to Azure API for FHIR

Browse to the Access control (IAM) blade.
Select Add, and then select Add role assignment to open the Add role assignment page.
Assign the AcrPull role.

For more information about assigning roles in the Azure portal, see Azure built-in roles.

Register the ACR servers in Azure API for FHIR

You can register the ACR server using the Azure portal, or using CLI.

Registering the ACR server using Azure portal

Browse to the Artifacts blade under Data transformation in your Azure API for FHIR instance. You see the list of currently registered ACR servers. Select Add, and then select your registry server from the drop-down menu. You need to select Save for the registration to take effect. It may take a few minutes to apply the change and restart your instance.

Registering the ACR server using CLI

You can register up to 20 ACR servers in the Azure API for FHIR.

Install Azure Health Data Services CLI from Azure PowerShell if needed:

az extension add -n healthcareapis

Register a single ACR server

az healthcareapis acr add --login-servers "fhiracr2021.azurecr.io" --resource-group fhir-test --resource-name fhirtest2021

Register multiple ACR servers

az healthcareapis acr add --login-servers "fhiracr2021.azurecr.io fhiracr2020.azurecr.io" --resource-group fhir-test --resource-name fhirtest2021

Configure ACR firewall

Select Networking for the Azure storage account from the portal.

Screen image of the container registry.

Select Selected networks.

Under the Firewall section, specify the IP address in the Address range box. Add IP ranges to allow access from the internet or your on-premises networks.

In the following table, you'll find the IP address for the Azure region where the Azure API for FHIR service is provisioned.

Azure Region	Public IP Address
Australia East	20.53.47.210
Brazil South	191.238.72.227
Canada Central	20.48.197.161
Central India	20.192.47.66
East US	20.62.134.242, 20.62.134.244, 20.62.134.245
East US 2	20.62.60.115, 20.62.60.116, 20.62.60.117
France Central	51.138.211.19
Germany North	51.116.60.240
Germany West Central	20.52.88.224
Japan East	20.191.167.146
Japan West	20.189.228.225
Korea Central	20.194.75.193
North Central US	52.162.111.130, 20.51.0.209
North Europe	52.146.137.179
Qatar Central	20.21.36.225
South Africa North	102.133.220.199
South Central US	20.65.134.83
Southeast Asia	20.195.67.208
Sweden Central	51.12.28.100
Switzerland North	51.107.247.97
UK South	51.143.213.211
UK West	51.140.210.86
West Central US	13.71.199.119
West Europe	20.61.103.243, 20.61.103.244
West US 2	20.51.13.80, 20.51.13.84, 20.51.13.85
West US 3	20.150.245.165

Note

The preceding steps are similar to the configuration steps described in the document How to export FHIR data. For more information, see Secure Export to Azure Storage

Verify

Make a call to the $convert-data API specifying your template reference in the templateCollectionReference parameter.

<RegistryServer>/<imageName>@<imageDigest>

Next steps

In this article, you learned about data conversion for Azure API for FHIR. For more information about related GitHub Projects for Azure API for FHIR, see

Note

FHIR® is a registered trademark of HL7 and is used with the permission of HL7.

שתף באמצעות

Converting your data to FHIR for Azure API for FHIR

Use the $convert-data endpoint

Parameter Resource

Sample Request

Sample Response

Customize templates

Host and use templates

Push templates to Azure Container Registry

Enable Managed Identity on Azure API for FHIR

Provide access of the ACR to Azure API for FHIR

Register the ACR servers in Azure API for FHIR

Registering the ACR server using Azure portal

Registering the ACR server using CLI

Register a single ACR server

Register multiple ACR servers

Configure ACR firewall

Verify

Next steps

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