# GFE Reference - Patient Cost Transparency Implementation Guide v2.0.1

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

## Extension: GFE Reference 

| | | |
| :--- | :--- | :--- |
| *Official URL*:http://hl7.org/fhir/us/davinci-pct/StructureDefinition/gfeReference | *Version*:2.0.1 | |
| * Standards status: *[Trial-use](http://hl7.org/fhir/R4/versions.html#std-process) | [Maturity Level](http://hl7.org/fhir/versions.html#maturity): 2 | *Computable Name*:GFEReference |
| *Other Identifiers:*OID:2.16.840.1.113883.4.642.40.4.42.28 | | |

This extension is used to reference the GFE submitted by an entity that started the process for obtaining an Advanced EOB.

**Context of Use**

**Usage info**

**Usages:**

* Use this Extension: [PCT Advanced EOB](StructureDefinition-davinci-pct-aeob.md)
* Examples for this Extension: [Bundle/PCT-AEOB-Packet-1](Bundle-PCT-AEOB-Packet-1.md) and [ExplanationOfBenefit/PCT-AEOB-1](ExplanationOfBenefit-PCT-AEOB-1.md)

You can also check for [usages in the FHIR IG Statistics](https://packages2.fhir.org/xig/hl7.fhir.us.davinci-pct|current/StructureDefinition/gfeReference)

**Changes since version 1.1.0:**

* No changes

### 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-gfeReference.csv), [Excel](StructureDefinition-gfeReference.xlsx), [Schematron](StructureDefinition-gfeReference.sch) 

#### Constraints



## Resource Content

```json
{
  "resourceType" : "StructureDefinition",
  "id" : "gfeReference",
  "extension" : [{
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode" : "fm"
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger" : 2,
    "_valueInteger" : {
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
        "valueCanonical" : "http://hl7.org/fhir/us/davinci-pct/ImplementationGuide/hl7.fhir.us.davinci-pct"
      }]
    }
  },
  {
    "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/davinci-pct/ImplementationGuide/hl7.fhir.us.davinci-pct"
      }]
    }
  }],
  "url" : "http://hl7.org/fhir/us/davinci-pct/StructureDefinition/gfeReference",
  "identifier" : [{
    "system" : "urn:ietf:rfc:3986",
    "value" : "urn:oid:2.16.840.1.113883.4.642.40.4.42.28"
  }],
  "version" : "2.0.1",
  "name" : "GFEReference",
  "title" : "GFE Reference",
  "status" : "active",
  "date" : "2026-03-26T13:47:00+00:00",
  "publisher" : "HL7 International / Financial Management",
  "contact" : [{
    "name" : "HL7 International / Financial Management",
    "telecom" : [{
      "system" : "url",
      "value" : "http://www.hl7.org/Special/committees/fm"
    },
    {
      "system" : "email",
      "value" : "fmlists@lists.hl7.org"
    }]
  }],
  "description" : "This extension is used to reference the GFE submitted by an entity that started the process for obtaining an Advanced EOB.",
  "jurisdiction" : [{
    "coding" : [{
      "system" : "urn:iso:std:iso:3166",
      "code" : "US"
    }]
  }],
  "fhirVersion" : "4.0.1",
  "mapping" : [{
    "identity" : "rim",
    "uri" : "http://hl7.org/v3",
    "name" : "RIM Mapping"
  }],
  "kind" : "complex-type",
  "abstract" : false,
  "context" : [{
    "type" : "element",
    "expression" : "ExplanationOfBenefit"
  }],
  "type" : "Extension",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation" : "constraint",
  "differential" : {
    "element" : [{
      "id" : "Extension",
      "path" : "Extension",
      "short" : "GFE Reference",
      "definition" : "This extension is used to reference the GFE submitted by an entity that started the process for obtaining an Advanced EOB."
    },
    {
      "id" : "Extension.extension",
      "path" : "Extension.extension",
      "max" : "0"
    },
    {
      "id" : "Extension.url",
      "path" : "Extension.url",
      "fixedUri" : "http://hl7.org/fhir/us/davinci-pct/StructureDefinition/gfeReference"
    },
    {
      "id" : "Extension.value[x]",
      "path" : "Extension.value[x]",
      "min" : 1,
      "type" : [{
        "code" : "Reference",
        "targetProfile" : ["http://hl7.org/fhir/us/davinci-pct/StructureDefinition/davinci-pct-gfe-bundle"]
      }]
    }]
  }
}

```
