2026 US Quality Core Implementation Guide
0.5.0 - cibuild US

2026 US Quality Core Implementation Guide, published by Office of the National Coordinator for Health Information Technology (ONC). This guide is not an authorized publication; it is the continuous build for version 0.5.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/FHIR/us-quality-core/ and changes regularly. See the Directory of published versions

## Extension: USQualityCore Not Done ValueSet

Official URL: http://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-notDoneValueSet | Version: 0.5.0
Draft as of 2026-05-15 | Computable Name: USQualityCoreNotDoneValueSet

A logical reference (e.g. a reference to ValueSet.url) to a value set/version that identifies a set of possible coded values representing activities that were not requested, ordered, or performed.

Context of Use

This extension may be used on the following element(s)

- Element ID: `CodeableConcept`

Usage info

Usages:

- Use this Extension: US Quality Core Communication Not Done, US Quality Core Device Not Requested, US Quality Core Immunization Not Done, US Quality Core MedicationAdministration Not Done... Show 6 more, US Quality Core MedicationDispense Declined, US Quality Core Medication Not Requested, US Quality Core Observation Cancelled, US Quality Core Procedure Not Done, US Quality Core Service Not Requested and US Quality Core Task Rejected
- Examples for this Extension: DeviceRequest/negation-example, Immunization/negation-example, MedicationAdministration/negation-example, MedicationDispense/negation-example... Show 5 more, MedicationRequest/negation-example, Observation/negation-example, Procedure/negation-example, ServiceRequest/negation-example and Task/negation-example

You can also check for usages in the FHIR IG Statistics

### Formal Views of Extension Content

Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.

- Differential Table
- Snapshot Table
- Statistics/References
- All

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..1 | Extension | Url of a value set of activities not requested or performed
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "http://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-notDoneValueSet"
value[x] |  | 1..1 | canonical(ValueSet) | Value of extension
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..1 | Extension | Url of a value set of activities not requested or performed
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://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-notDoneValueSet"
value[x] |  | 1..1 | canonical(ValueSet) | Value of extension
Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type canonical: A logical reference (e.g. a reference to ValueSet.url) to a value set/version that identifies a set of possible coded values representing activities that were not requested, ordered, or performed.

Differential View

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..1 | Extension | Url of a value set of activities not requested or performed
extension |  | 0..0 |  | Extension
url |  | 1..1 | uri | "http://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-notDoneValueSet"
value[x] |  | 1..1 | canonical(ValueSet) | Value of extension
Documentation for this format

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..1 | Extension | Url of a value set of activities not requested or performed
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://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-notDoneValueSet"
value[x] |  | 1..1 | canonical(ValueSet) | Value of extension
Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type canonical: A logical reference (e.g. a reference to ValueSet.url) to a value set/version that identifies a set of possible coded values representing activities that were not requested, ordered, or performed.

Other representations of profile: CSV, Excel, Schematron

#### 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()`