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

## Relationship with US Core and QI-Core

### Relationship with US Core

The profiles defined in US Quality Core are derived from US Core profiles whenever possible. As a result, conforming to US Core automatically satisfies a significant subset of the conformance requirements of US Quality Core. US Quality Core conformance involves supporting certain additional data elements not required by US Core, because they are needed for quality measurement and reporting.

Because US Quality Core profiles derive from US Core profiles where possible, wherever US Core defines a binding, the US Quality Core profiles inherit that binding. US Quality Core may specify additional constraints, such as requiring a binding that is only preferred in the US Core base profile, but in general, the US Quality Core profiles use the same bindings as US Core.

### Relationship with QI-Core

As described in the Background section of this guide, US Quality Core is a direct descendant of QI-Core. This version of US Quality Core is derived from QI-Core 6.0.0. See the Scope and Change Log sections of this guide for details on the scope of changes made from QI-Core 6.0.0.