National Directory of Healthcare Providers & Services (NDH) Implementation Guide
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National Directory of Healthcare Providers & Services (NDH) Implementation Guide, published by HL7 International / Patient Administration. This guide is not an authorized publication; it is the continuous build for version 2.0.0-current built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-us-ndh/ and changes regularly. See the Directory of published versions

Extension: NDH Via Intermediary

Official URL: http://hl7.org/fhir/us/ndh/StructureDefinition/base-ext-via-intermediary Version: 2.0.0-current
Standards status: Trial-use Active as of 2026-04-22 Maturity Level: 4 Computable Name: ViaIntermediary

A reference to an alternative point of contact (NdhPractitionerRole, NdhOrganization, NdhOrganizationAffiliation, or NdhLocation) for this organization

Context of Use

Usage info

Usages:

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description Differentials, Snapshots, and other representations.

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension NDH Via Intermediary
... extension 0..0 Extension
... url 1..1 uri "http://hl7.org/fhir/us/ndh/StructureDefinition/base-ext-via-intermediary"
... value[x] S 1..1 Reference(NDH PractitionerRole | NDH OrganizationAffiliation Profile | NDH Location Profile | NDH Organization Profile) Value of extension

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension NDH Via Intermediary
... id 0..1 string Unique id for inter-element referencing
... extension 0..0 Extension
Slice: Unordered, Open by value:url
... url 1..1 uri "http://hl7.org/fhir/us/ndh/StructureDefinition/base-ext-via-intermediary"

doco Documentation for this format

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()

Summary

Simple Extension with the type Reference: A reference to an alternative point of contact (NdhPractitionerRole, NdhOrganization, NdhOrganizationAffiliation, or NdhLocation) for this organization

Maturity: 4

Differential ViewDifferential View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension NDH Via Intermediary
... extension 0..0 Extension
... url 1..1 uri "http://hl7.org/fhir/us/ndh/StructureDefinition/base-ext-via-intermediary"
... value[x] S 1..1 Reference(NDH PractitionerRole | NDH OrganizationAffiliation Profile | NDH Location Profile | NDH Organization Profile) Value of extension

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension NDH Via Intermediary
... id 0..1 string Unique id for inter-element referencing
... extension 0..0 Extension
Slice: Unordered, Open by value:url
... url 1..1 uri "http://hl7.org/fhir/us/ndh/StructureDefinition/base-ext-via-intermediary"

doco Documentation for this format

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()

Summary

Simple Extension with the type Reference: A reference to an alternative point of contact (NdhPractitionerRole, NdhOrganization, NdhOrganizationAffiliation, or NdhLocation) for this organization

Maturity: 4

 

Other representations of profile: CSV, Excel, Schematron