FHIR Extensions Pack
5.3.0 - May 2026 International flag

This page is part of the FHIR Core Extensions Registry (v5.3.0: Release 5.3) based on FHIR (HL7® FHIR® Standard) v5.0.0. This is the current published version in its permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions

Extension: Specimen Additive

Official URL: http://hl7.org/fhir/StructureDefinition/specimen-additive Version: 5.3.0
Standards status: Draft Maturity Level: 1 Responsible: HL7 International / Orders and Observations Computable Name: SpecimenAdditive
Other Identifiers: OID:2.16.840.1.113883.4.642.5.1733

References a resource or provides a code or text that specifies a substance that is added to a laboratory specimen (part of the container device or added to the specimen indenpendently).

This is an draft extension definition; the committee is seeking implementation feedback, and the definition or contents of the extension may change in future versions

Context of Use

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

Usage info

Usages:

  • This Extension is not used by any profiles in this Implementation Guide

You can also check for usages in the FHIR IG Statistics

Changes since version 5.2.0:

  • The resource metadata has changed (experimental)

    • Formal Views of Extension Content

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

    This structure is derived from Extension

    Summary

    Simple Extension with the type CodeableReference: References a resource or provides a code or text that specifies a substance that is added to a laboratory specimen (part of the container device or added to the specimen indenpendently).

    Maturity: 1

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..* Extension Specifies a substance that is added to a laboratory specimen
    ... extension 0..0 Extension
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/specimen-additive"
    ... value[x] 1..1 CodeableReference(Substance) Value of extension
    Binding: SpecimenAdditiveSubstanceCodes (example)

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..* Extension Specifies a substance that is added to a laboratory specimen
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..0 Extension
    Slice: Unordered, Open by value:url
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/specimen-additive"

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Simple Extension with the type CodeableReference: References a resource or provides a code or text that specifies a substance that is added to a laboratory specimen (part of the container device or added to the specimen indenpendently).

    Maturity: 1

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..* Extension Specifies a substance that is added to a laboratory specimen
    ... extension 0..0 Extension
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/specimen-additive"
    ... value[x] 1..1 CodeableReference(Substance) Value of extension
    Binding: SpecimenAdditiveSubstanceCodes (example)

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..* Extension Specifies a substance that is added to a laboratory specimen
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..0 Extension
    Slice: Unordered, Open by value:url
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/specimen-additive"

    doco Documentation for this format

     

    Other representations of profile: CSV, Excel, Schematron

    Terminology Bindings

    Path Status Usage ValueSet Version Source
    Extension.value[x] Base example Specimen Additive Substance Codes 📦5.3.0 This IG

    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()

    R4B

    The extension is unchanged in R4B

    R4

    The extension is represented a little differently in R4:

    • Replace the type CodeableReference with a set of extensions for the content of the type along with the _datatype extension
    Name Flags Card. Type Description & Constraints      Filter: Filters doco
    . . Extension 0..* Extension Specifies a substance that is added to a laboratory specimen
    . . . Slices for extension 0 ..* Extension Extension
    Slice: Unordered, Open by value:url
    . . . . extension:_datatype 1..1 (Complex) DataType name 'CodeableReference' from R5
    URL: http://hl7.org/fhir/StructureDefinition/_datatype
    . . . . . value[x] 1.. 1 string Value of extension
    Fixed Value: CodeableReference
    . . . . extension:concept 0..1 Extension Reference to a concept (by class)
    . . . . . extension 0 .. 0 Extension
    . . . . . url 1 .. 1 uri "concept"
    . . . . . value[x] 1.. 1 CodeableConcept Value of extension
    Binding: SpecimenAdditiveSubstanceCodes ( example )
    . . . . extension:reference 0..1 Extension Reference to a resource (by instance)
    . . . . . extension 0 .. 0 Extension
    . . . . . url 1 .. 1 uri "reference"
    . . . . . value[x] 1.. 1 Reference () Value of extension
    . . . url 1 .. 1 uri "http://hl7.org/fhir/StructureDefinition/specimen-additive"
    . . . value[x] 0 .. 0 Value of extension
    Binding: SpecimenAdditiveSubstanceCodes ( example )

    doco Documentation for this format

    R3

    The extension is represented a little differently in R3:

    • Replace the type CodeableReference with a set of extensions for the content of the type along with the _datatype extension
    Name Flags Card. Type Description & Constraints      Filter: Filters doco
    . . Extension 0..* Extension Specifies a substance that is added to a laboratory specimen
    . . . Slices for extension 0 ..* Extension Extension
    Slice: Unordered, Open by value:url
    . . . . extension:_datatype 1..1 (Complex) DataType name 'CodeableReference' from R5
    URL: http://hl7.org/fhir/StructureDefinition/_datatype
    . . . . . value[x] 1.. 1 string Value of extension
    Fixed Value: CodeableReference
    . . . . extension:concept 0..1 Extension Reference to a concept (by class)
    . . . . . extension 0 .. 0 Extension
    . . . . . url 1 .. 1 uri "concept"
    . . . . . value[x] 1.. 1 CodeableConcept Value of extension
    Binding: SpecimenAdditiveSubstanceCodes ( example )
    . . . . extension:reference 0..1 Extension Reference to a resource (by instance)
    . . . . . extension 0 .. 0 Extension
    . . . . . url 1 .. 1 uri "reference"
    . . . . . value[x] 1.. 1 Reference () Value of extension
    . . . url 1 .. 1 uri "http://hl7.org/fhir/StructureDefinition/specimen-additive"
    . . . value[x] 0 .. 0 Value of extension
    Binding: SpecimenAdditiveSubstanceCodes ( example )

    doco Documentation for this format

    Search Parameters for this Extension

    (none found)