FHIR Type Tree

The FHIR specification defines a set of structure definitions that establish the structure of the FHIR resources (such as Patient and Observation) and their elements.

In the FHIR type framework, a structure definition defines a type which can be derived (profiled), either by specialization or constraint, from another type. This establishes a hierarchical relationship between the types (a tree of structure definitions). The top-level structure definitions in the tree are the structure definitions that do not have a base structure definition. (In FHIR R5 and above, the only top-level structure definition is the Base structure definition.)

To show the full hierarchy of FHIR data types and resources and make it more accessible, I've created this visualization that displays the tree of structure definitions defined in the FHIR specification.

Explore the FHIR type tree

Select the specification to view.
About FHIR R5 (v5.0.0)
FHIR Release 5 was released in 2023 and saw increased normative content.
Whether to display the structure definition descriptions in the tree.

See also

Implementation guides used by countries or specific regions.
FHIR
Test CQL against FHIR resources.
CQL, FHIR
How are WHO-FIC entities modeled?
healthcare standards, data models
Visualize FHIR resources and their relationships.
FHIR
An overview of FHIR and its impact on patient care.
FHIR
Evaluate FHIR Measure resources online.
FHIR, CQL, clinical quality measures, clinical reasoning
Query FHIR stores using GraphQL.
FHIR, GraphQL
Browse the OMOP Common Data Model.
OMOP, healthcare standards
Browse the FHIR resource model.
FHIR, data models
Query FHIR servers using HFQL online.
HFQL, FHIR
Browse the PCORnet Common Data Model.
PCORnet, healthcare standards
Execute the $validate operation against a FHIR endpoint.
FHIR, data validation

Made by Anton Vasetenkov.

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