Others titles

  • FHIR Concept Map Resource
  • Electronic Health Records Exchange Through FHIR


  • FHIR
  • HL7
  • Medical Terminology
  • Processes Data
  • Processes Information
  • Processes Documentation
  • Health Information Exchange
  • Electronic Health Records
  • FHIR Smart
  • Smart on FHIR

Concept Map

Concept Map resource is a statement of relationships from one set of concepts to one or more other concepts – either concepts in code systems, or data element/data element concepts, or classes in class models.

Log in to download

Get The Data

  • The data in CSV format DOWNLOAD
  • Metadata in Human Readable format (PDF) DOWNLOAD
  • Metadata in Machine Readable format (JSON) DOWNLOAD
Your Data License
  • Research
    Non-Commercial, Share-Alike, Attribution Free Forever
  • Commercial
    Commercial Use, Remix & Adapt, White Label Buy Subscription


A concept map defines a mapping from a set of concepts defined in a code system (commonly referred to as the “system”) to one or more concepts defined in other code systems. In the mapping context, a system can be a typical code system based on a recognized standard or local terminology (in any of its forms), or in some cases it may be an “implicit” code system that is not based on a recognized terminology but still represents a set of “concepts” that can be usefully mapped. Mappings are one way – from the source to the target system. In many cases, the reverse mappings are valid, but this cannot be assumed to be the case.

Mappings between code system concepts are only intended to be defined in the context of a particular business usage. The business use case is normally defined by the specification of the source and target value sets. The mappings may be useful in other contexts, but this must be determined based on the context of use and meaning; it cannot be taken for granted automatically. An example where the usage context is important for choosing the correct mapping is mapping from a clinical terminology (e.g. SNOMED CT-Systematized Nomenclature of Medicine Clinical Terms) to a classification (e.g. ICD-10, International Classification of Diseases 10th Revision) for either data analysis or billing. Mappings in the data analysis context would be targeted for an appropriate classification (often at a higher level), whereas in the billing context there may be specific requirements to be met (e.g. leaf level codes only) that could result in multiple mappings for a single source concept and then require additional information beyond the source concept itself in order to select the correct final mapping.

Note that all code systems (explicit or implicit) represented in FHIR have URI (Uniform Resource Identifier) identifiers for value sets (also either explicit or implicit) that include the entire code system, and these “all codes” value sets can be used for mappings that are valid in all use contexts that are appropriate for the code system.

Each mapping for a concept from the source to target system includes an equivalence property that specifies how similar the mapping is (or, in some cases, that there is no valid mapping). There is one element for each concept or field in the source value set or system that needs to be mapped. Each source concept may have multiple targets:

– because there are multiple possible mappings (e.g., ambiguous)
– to specify a correct map, and specify other mappings as invalid
– when there are multiple mappings depending on the values of other elements (dependsOn)

There should be at least one target for each element, but some incomplete concept maps might not have a target for each concept.
A key concept for the Concept Map resource is the translate operation. This operation is a formal definition of an API by which a terminology server can allow clients to ask for a translation to be done based on the content in the Concept Map resource. As such it also provides a useful perspective on the operational use of Concept Map resources in any context.

Fast Healthcare Interoperability Resources (FHIR) is a draft standard describing data formats and elements (known as “resources”) and an application programming interface (API) for exchanging electronic health records. The standard was created by the Health Level Seven International (HL7) health-care standards organization.

Its goal is to facilitate interoperation between legacy healthcare systems, to make it easy to provide healthcare information to healthcare providers and individuals on a wide variety of devices from computers to tablets to cell phones, and to allow third-party application developers to provide medical applications which can be easily integrated into existing systems.

FHIR provides an alternative to document-centric approaches by directly exposing discrete data elements as services. For example, basic elements of healthcare like patients, admissions, diagnostic reports and medications can each be retrieved and manipulated via their own resource URLs (Uniform Resource Locators). FHIR was supported at an American Medical Informatics Association meeting by many EHR (Electronic Health Record) vendors which value its open and extensible nature.

About this Dataset

Data Info

Date Created


Last Modified




Update Frequency


Temporal Coverage


Spatial Coverage

United States


John Snow Labs; Health Level Seven International;

Source License URL

Source License Requirements


Source Citation



FHIR, HL7, Medical Terminology, Processes Data, Processes Information, Processes Documentation, Health Information Exchange, Electronic Health Records, FHIR Smart, Smart on FHIR

Other Titles

FHIR Concept Map Resource, Electronic Health Records Exchange Through FHIR

Data Fields

Name Description Type Constraints
Concept_NameName of the concept in the FHIR structurestringrequired : 1
Computer_Ready_NameA Computer-ready name (e.g. a token) that identifies the structure - suitable for code generation. Note that this name (and other names relevant for code generation, including element & slice names, codes etc) may collide with reserved words in the relevant target language, and code generators will need to handle this.string-
TypeThe type the structure describes.string-
Dollar_RefThe Dollar_Ref ($ref) string value contains a Uniform Resource Identifier (URI) which identifies the location of the JSON (JavaScript Object Notation) value being referenced.string-
DescriptionA free text natural language description of the structure and its usestring-
ItemsThe value of the keyword should be an object or an array of objects. If the keyword value is an object, then for the data array to be valid each item of the array should be valid according to the schema in this value.string-
EnumThe enum is used to restrict a value to a fixed set of values. It must be an array with at least one element, where each element is unique.string-
RequiredThe value of the keyword should be an array of unique strings. The data object to be valid should contain all properties with names equal to the elements in the keyword value.string-
ConstThe value of this keyword can be anything. The data is valid if it is deeply equal to the value of the keyword.string-

Data Preview

Concept NameComputer Ready NameTypeDollar RefDescriptionItemsEnumRequiredConst
ConceptMapresourceTypeThis is a ConceptMap resourceConceptMap
ConceptMapid#/definitions/idThe logical id of the resource as used in the URL for the resource. Once assigned this value never changes.
ConceptMapmeta#/definitions/MetaThe metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource.
ConceptMapimplicitRules#/definitions/uriA reference to a set of rules that were followed when the resource was constructed and which must be understood when processing the content. Often this is a reference to an implementation guide that defines the special rules along with other profiles etc.
ConceptMap_implicitRules#/definitions/ElementExtensions for implicitRules
ConceptMaplanguage#/definitions/codeThe base language in which the resource is written.
ConceptMap_language#/definitions/ElementExtensions for language
ConceptMaptext#/definitions/NarrativeA human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data but is required to contain sufficient detail to make it "clinically safe" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety.
ConceptMapcontainedarrayThese resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently and nor can they have their own independent transaction scope.{'$ref': '#/definitions/ResourceList'}
ConceptMapextensionarrayMay be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension there is a set of requirements that SHALL be met as part of the definition of the extension.{'$ref': '#/definitions/Extension'}