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FHIR Extension: IsTTY

Documentation for our IsTTY Extension in FHIR4

Rachel Shelswell avatar
Written by Rachel Shelswell
Updated over a week ago

Extension: "IsTTY"
URL: ""
Value: valueBoolean


This extension is used with Telecom, to define whether or not the phone system is Text Telephone enabled.

Resource & Resource Element Locations:

This extension is located under HealthcareService.telecom 


"resource": {
    "resourceType": "HealthcareService",
    "id": "16907",
            "extension": [
                    "url": "",
                    "valueBoolean": true
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