# NDH Network Reference - National Directory of Healthcare Providers & Services (NDH) Implementation Guide v2.0.0-current

* [**Table of Contents**](toc.md)
* [**Artifacts Summary**](artifacts.md)
* **NDH Network Reference**

## Extension: NDH Network Reference 

| | | |
| :--- | :--- | :--- |
| *Official URL*:http://hl7.org/fhir/us/ndh/StructureDefinition/base-ext-network-reference | *Version*:2.0.0-current | |
| * Standards status: *[Trial-use](http://hl7.org/fhir/R4/versions.html#std-process) | [Maturity Level](http://hl7.org/fhir/versions.html#maturity): 4 | *Computable Name*:NetworkReference |

A reference to the healthcare provider insurance networks (NdhNetwork) the practitioner participates in through their role

**Context of Use**

**Usage info**

**Usages:**

* Use this Extension: [NDH HealthcareService Profile](StructureDefinition-ndh-HealthcareService.md) and [NDH PractitionerRole](StructureDefinition-ndh-PractitionerRole.md)
* Examples for this Extension: [Welcome Home](HealthcareService-HealthcareServiceHomelessAssistance.md), [PractitionerRole/HansSoloRole](PractitionerRole-HansSoloRole.md), [PractitionerRole/HansSoloRole2](PractitionerRole-HansSoloRole2.md), [PractitionerRole/JoeSmithHospitalRole](PractitionerRole-JoeSmithHospitalRole.md)... Show 4 more, [PractitionerRole/JoeSmithRole2](PractitionerRole-JoeSmithRole2.md), [PractitionerRole/PractitionerOneNetwork1Role](PractitionerRole-PractitionerOneNetwork1Role.md), [PractitionerRole/PractitionerOneNetwork2Role](PractitionerRole-PractitionerOneNetwork2Role.md) and [PractitionerRole/PractitionerTwoNetwork1LeftAfterSixMonthRole](PractitionerRole-PractitionerTwoNetwork1LeftAfterSixMonthRole.md)

You can also check for [usages in the FHIR IG Statistics](https://packages2.fhir.org/xig/hl7.fhir.us.ndh|current/StructureDefinition/base-ext-network-reference)

### Formal Views of Extension Content

 [Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work](http://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#structure-definitions). 

 

Other representations of profile: [CSV](StructureDefinition-base-ext-network-reference.csv), [Excel](StructureDefinition-base-ext-network-reference.xlsx), [Schematron](StructureDefinition-base-ext-network-reference.sch) 

#### Constraints



## Resource Content

```json
{
  "resourceType" : "StructureDefinition",
  "id" : "base-ext-network-reference",
  "extension" : [{
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode" : "pa"
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger" : 4,
    "_valueInteger" : {
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
        "valueCanonical" : "http://hl7.org/fhir/us/ndh/ImplementationGuide/hl7.fhir.us.ndh"
      }]
    }
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode" : "trial-use",
    "_valueCode" : {
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
        "valueCanonical" : "http://hl7.org/fhir/us/ndh/ImplementationGuide/hl7.fhir.us.ndh"
      }]
    }
  }],
  "url" : "http://hl7.org/fhir/us/ndh/StructureDefinition/base-ext-network-reference",
  "version" : "2.0.0-current",
  "name" : "NetworkReference",
  "title" : "NDH Network Reference",
  "status" : "active",
  "date" : "2026-03-23T21:58:05+00:00",
  "publisher" : "HL7 International / Patient Administration",
  "contact" : [{
    "name" : "HL7 International / Patient Administration",
    "telecom" : [{
      "system" : "url",
      "value" : "http://www.hl7.org/Special/committees/pafm"
    },
    {
      "system" : "email",
      "value" : "pafm@lists.hl7.org"
    }]
  }],
  "description" : "A reference to the healthcare provider insurance networks (NdhNetwork) the practitioner participates in through their role",
  "jurisdiction" : [{
    "coding" : [{
      "system" : "urn:iso:std:iso:3166",
      "code" : "US",
      "display" : "United States of America"
    }]
  }],
  "fhirVersion" : "4.0.1",
  "mapping" : [{
    "identity" : "rim",
    "uri" : "http://hl7.org/v3",
    "name" : "RIM Mapping"
  }],
  "kind" : "complex-type",
  "abstract" : false,
  "context" : [{
    "type" : "element",
    "expression" : "PractitionerRole"
  },
  {
    "type" : "element",
    "expression" : "HealthcareService"
  }],
  "type" : "Extension",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation" : "constraint",
  "differential" : {
    "element" : [{
      "id" : "Extension",
      "path" : "Extension",
      "short" : "NDH Network Reference",
      "definition" : "A reference to the healthcare provider insurance networks (NdhNetwork) the practitioner participates in through their role"
    },
    {
      "id" : "Extension.extension",
      "path" : "Extension.extension",
      "max" : "0"
    },
    {
      "id" : "Extension.url",
      "path" : "Extension.url",
      "fixedUri" : "http://hl7.org/fhir/us/ndh/StructureDefinition/base-ext-network-reference"
    },
    {
      "id" : "Extension.value[x]",
      "path" : "Extension.value[x]",
      "min" : 1,
      "type" : [{
        "code" : "Reference",
        "targetProfile" : ["http://hl7.org/fhir/us/ndh/StructureDefinition/ndh-Network"]
      }],
      "mustSupport" : true
    }]
  }
}

```
