ePMA Implementation Guidance for FHIR STU3

This guidance is under active development by NHS Digital and content may be added or updated on a regular basis.
Please note: This guidance has been superseded by the Implementation guide for digitial medicines, which contains up-to-date information.

Medication

idΣ0..1id
metaΣ0..1Meta
implicitRulesΣ ?!0..1uri
language0..1codeBinding
textI0..1Narrative
contained0..*Resource
extensionI0..*Extension
modifierExtension?! I0..*Extension
id0..1string
extensionI0..*Extension
id0..1string
snomedCTDescriptionIDI0..1Extension(Complex)
systemΣ0..1uri
versionΣ0..1string
codeΣ0..1code
displayΣ0..1string
userSelectedΣ0..1boolean
textΣ0..1string
statusΣ0..1codeBinding
isBrandΣ0..1boolean
isOverTheCounterΣ0..1boolean
manufacturerΣ I0..1Reference()
id0..1string
extensionI0..*Extension
id0..1string
snomedCTDescriptionIDI0..1Extension(Complex)
systemΣ1..1uriFixed Value
versionΣ0..1string
codeΣ1..1code
displayΣ1..1string
userSelectedΣ0..1boolean
textΣ0..1string
id0..1string
extensionI0..*Extension
modifierExtensionΣ ?! I0..*Extension
itemCodeableConceptCodeableConcept
itemReferenceReference(Substance | )
isActive0..1boolean
amountI0..1Ratio
id0..1string
extensionI0..*Extension
modifierExtensionΣ ?! I0..*Extension
container0..1CodeableConcept
id0..1string
extensionI0..*Extension
modifierExtensionΣ ?! I0..*Extension
itemCodeableConceptCodeableConcept
itemReferenceReference()
amountI0..1SimpleQuantity
id0..1string
extensionI0..*Extension
modifierExtensionΣ ?! I0..*Extension
lotNumber0..1string
expirationDate0..1dateTime
imageI0..*Attachment
Medication
DefinitionThis resource is primarily used for the identification and definition of a medication. It covers the ingredients and the packaging for a medication.
Cardinality0...*
Invariants
  • dom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources
    contained.contained.empty()
  • dom-1: If the resource is contained in another resource, it SHALL NOT contain any narrative
    contained.text.empty()
  • dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated
    contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
  • dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource
    contained.where(('#'+id in %resource.descendants().reference).not()).empty()
Mappings
  • rim: Entity. Role, or Act
  • script10.6: NewRx/MedicationPrescribed -or- RxFill/MedicationDispensed -or- RxHistoryResponse/MedicationDispensed -or- RxHistoryResponse/MedicationPrescribed
  • rim: ManufacturedProduct[classCode=ADMM]
  • w5: clinical.medication
Medication.id
DefinitionThe logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes.
Cardinality0...1
Typeid
SummaryTrue
Comments

The only time that a resource does not have an id is when it is being submitted to the server using a create operation.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
Medication.meta
DefinitionThe metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content may not always be associated with version changes to the resource.
Cardinality0...1
TypeMeta
SummaryTrue
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • rim: N/A
Medication.implicitRules
DefinitionA reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content.
Cardinality0...1
Typeuri
ModifierTrue
SummaryTrue
Comments

Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element.

This element is labelled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies it's meaning or interpretation.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
Medication.language
DefinitionThe base language in which the resource is written.
Cardinality0...1
Typecode
Binding
A human language.
Common Languages (extensible)
Comments

Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute).

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
Medication.text
DefinitionA human-readable narrative that contains a summary of the resource, and may 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.
Cardinality0...1
TypeNarrative
Aliasnarrative, html, xhtml, display
Comments

Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied). This may be necessary for data from legacy systems where information is captured as a "text blob" or where text is additionally entered raw or narrated and encoded in formation is added later.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • rim: N/A
  • rim: Act.text?
Medication.contained
DefinitionThese 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.
Cardinality0...*
TypeResource
Aliasinline resources, anonymous resources, contained resources
Comments

This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again.

Mappings
  • rim: Entity. Role, or Act
  • rim: N/A
Medication.extension
DefinitionMay be used to represent additional information that is not part of the basic definition of the resource. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Cardinality0...*
TypeExtension
Aliasextensions, user content
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

SlicingUnordered, Open, by url(Value)
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.modifierExtension
DefinitionMay be used to represent additional information that is not part of the basic definition of the resource, and that modifies the understanding of the element that contains it. Usually modifier elements provide negation or qualification. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.
Cardinality0...*
TypeExtension
ModifierTrue
Aliasextensions, user content
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

SlicingUnordered, Open, by url(Value)
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.code
DefinitionA code (or set of codes) that specify this medication, or a textual description if no code is available. Usage note: This could be a standard medication code such as a code from RxNorm, SNOMED CT, IDMP etc. It could also be a national or local formulary code, optionally with translations to other code systems.
Cardinality0...1
TypeCodeableConcept
Binding
A code from the SNOMED Clinical Terminology UK coding system that describes a medication from the VTM/VMP/VMPP/AMP/AMPP subsets from the dm+d terminology
(required)
SummaryTrue
Comments

Depending on the context of use, the code that was actually selected by the user (prescriber, dispenser, etc.) will have the coding.userSelected set to true. As described in the coding datatype: "A coding may be marked as a "userSelected" if a user selected the particular coded value in a user interface (e.g. the user selects an item in a pick-list). If a user selected coding exists, it is the preferred choice for performing translations etc.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: CE/CNE/CWE
  • rim: CD
  • orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
  • script10.6: coding.code = //element(*,MedicationType)/DrugCoded/ProductCode coding.system = //element(*,MedicationType)/DrugCoded/ProductCodeQualifier coding.display = //element(*,MedicationType)/DrugDescription
  • v2: RXO-1.1-Requested Give Code.code / RXE-2.1-Give Code.code / RXD-2.1-Dispense/Give Code.code / RXG-4.1-Give Code.code /RXA-5.1-Administered Code.code / RXC-2.1 Component Code
  • rim: .code
  • w5: class
Medication.code.id
Definitionunique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Cardinality0...1
Typestring
Comments

Note that FHIR strings may not exceed 1MB in size

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
Medication.code.extension
DefinitionMay be used to represent additional information that is not part of the basic definition of the element. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Cardinality0...*
TypeExtension
Aliasextensions, user content
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

SlicingUnordered, Open, by url(Value)
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.code.coding
DefinitionA reference to a code defined by a terminology system.
Cardinality0...*
TypeCoding
SummaryTrue
Requirements

Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings.

Comments

Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6
  • rim: CV
  • orim: fhir:Coding rdfs:subClassOf dt:CDCoding
  • v2: C*E.1-8, C*E.10-22
  • rim: union(., ./translation)
  • orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
Medication.code.coding.id
Definitionunique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Cardinality0...1
Typestring
Comments

Note that FHIR strings may not exceed 1MB in size

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
Medication.code.coding.extension
DefinitionMay be used to represent additional information that is not part of the basic definition of the element. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Cardinality0...*
TypeExtension
Aliasextensions, user content
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

SlicingUnordered, Open, by url(Value)
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.code.coding.extension:snomedCTDescriptionID
DefinitionThe SNOMED CT Description ID for the display.
Cardinality0...1
TypeExtension(Complex)
Aliasextensions, user content
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.code.coding.system
DefinitionThe identification of the code system that defines the meaning of the symbol in the code.
Cardinality0...1
Typeuri
SummaryTrue
Requirements

Need to be unambiguous about the source of the definition of the symbol.

Comments

The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: C*E.3
  • rim: ./codeSystem
  • orim: fhir:Coding.system rdfs:subPropertyOf dt:CDCoding.codeSystem
Medication.code.coding.version
DefinitionThe version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured. and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.
Cardinality0...1
Typestring
SummaryTrue
Comments

Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: C*E.7
  • rim: ./codeSystemVersion
  • orim: fhir:Coding.version rdfs:subPropertyOf dt:CDCoding.codeSystemVersion
Medication.code.coding.code
DefinitionA symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).
Cardinality0...1
Typecode
SummaryTrue
Requirements

Need to refer to a particular code in the system.

Comments

Note that FHIR strings may not exceed 1MB in size

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: C*E.1
  • rim: ./code
  • orim: fhir:Coding.code rdfs:subPropertyOf dt:CDCoding.code
Medication.code.coding.display
DefinitionA representation of the meaning of the code in the system, following the rules of the system.
Cardinality0...1
Typestring
SummaryTrue
Requirements

Need to be able to carry a human-readable meaning of the code for readers that do not know the system.

Comments

Note that FHIR strings may not exceed 1MB in size

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: C*E.2 - but note this is not well followed
  • rim: CV.displayName
  • orim: fhir:Coding.display rdfs:subPropertyOf dt:CDCoding.displayName
Medication.code.coding.userSelected
DefinitionIndicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays).
Cardinality0...1
Typeboolean
SummaryTrue
Requirements

This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing.

Comments

Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: Sometimes implied by being first
  • rim: CD.codingRationale
  • orim: fhir:Coding.userSelected fhir:mapsTo dt:CDCoding.codingRationale. fhir:Coding.userSelected fhir:hasMap fhir:Coding.userSelected.map. fhir:Coding.userSelected.map a fhir:Map; fhir:target dt:CDCoding.codingRationale. fhir:Coding.userSelected\#true a [ fhir:source "true"; fhir:target dt:CDCoding.codingRationale\#O ]
Medication.code.text
DefinitionA human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.
Cardinality0...1
Typestring
SummaryTrue
Requirements

The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.

Comments

Very often the text is the same as a displayName of one of the codings.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: C*E.9. But note many systems use C*E.2 for this
  • rim: ./originalText[mediaType/code="text/plain"]/data
  • orim: fhir:CodeableConcept.text rdfs:subPropertyOf dt:CD.originalText
Medication.status
DefinitionA code to indicate if the medication is in active use.
Cardinality0...1
Typecode
Binding
A coded concept defining if the medication is in active use
MedicationStatus (required)
SummaryTrue
Comments

This status is not intended to specify if a medication is part of a formulary.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • rim: .statusCode
Medication.isBrand
DefinitionSet to true if the item is attributable to a specific manufacturer.
Cardinality0...1
Typeboolean
SummaryTrue
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • script10.6: no mapping
  • rim: true if .player.scopingRole[typeCode=MANU] exists
  • w5: class
Medication.isOverTheCounter
DefinitionSet to true if the medication can be obtained without an order from a prescriber.
Cardinality0...1
Typeboolean
SummaryTrue
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • rim: NA
  • w5: class
Medication.manufacturer
DefinitionDescribes the details of the manufacturer of the medication product. This is not intended to represent the distributor of a medication product.
Cardinality0...1
TypeReference()
SummaryTrue
Comments

References SHALL be a reference to an actual FHIR resource, and SHALL be resolveable (allowing for access control, temporary unavailability, etc). Resolution can be either by retrieval from the URL, or, where applicable by resource type, by treating an absolute reference as a canonical URL and looking it up in a local registry/repository.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ref-1: SHALL have a contained resource if a local reference is provided
    reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
Mappings
  • rim: n/a
  • rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
  • script10.6: no mapping
  • v2: RXD-20-Substance Manufacturer Name / RXG-21-Substance Manufacturer Name / RXA-17-Substance Manufacturer Name
  • rim: .player.scopingRole[typeCode=MANU].scoper
  • w5: who.actor
Medication.form
DefinitionDescribes the form of the item. Powder; tablets; capsule.
Cardinality0...1
TypeCodeableConcept
Binding
A code from the SNOMED Clinical Terminology UK coding system that describes a medication dose form
(required)
Comments

When Medication is referenced from MedicationRequest, this is the ordered form. When Medication is referenced within MedicationDispense, this is the dispensed form. When Medication is referenced within MedicationAdministration, this is administered form.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: CE/CNE/CWE
  • rim: CD
  • orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
  • script10.6: coding.code = //element(*,DrugCodedType)/FormCode coding.system = //element(*,DrugCodedType)/FormSourceCode
  • v2: RXO-5-Requested Dosage Form / RXE-6-Give Dosage Form / RXD-6-Actual Dosage Form / RXG-8-Give Dosage Form / RXA-8-Administered Dosage Form
  • rim: .formCode
Medication.form.id
Definitionunique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Cardinality0...1
Typestring
Comments

Note that FHIR strings may not exceed 1MB in size

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
Medication.form.extension
DefinitionMay be used to represent additional information that is not part of the basic definition of the element. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Cardinality0...*
TypeExtension
Aliasextensions, user content
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

SlicingUnordered, Open, by url(Value)
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.form.coding
DefinitionA reference to a code defined by a terminology system.
Cardinality0...*
TypeCoding
SummaryTrue
Requirements

Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings.

Comments

Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6
  • rim: CV
  • orim: fhir:Coding rdfs:subClassOf dt:CDCoding
  • v2: C*E.1-8, C*E.10-22
  • rim: union(., ./translation)
  • orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
Medication.form.coding.id
Definitionunique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Cardinality0...1
Typestring
Comments

Note that FHIR strings may not exceed 1MB in size

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
Medication.form.coding.extension
DefinitionMay be used to represent additional information that is not part of the basic definition of the element. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Cardinality0...*
TypeExtension
Aliasextensions, user content
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

SlicingUnordered, Open, by url(Value)
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.form.coding.extension:snomedCTDescriptionID
DefinitionThe SNOMED CT Description ID for the display.
Cardinality0...1
TypeExtension(Complex)
Aliasextensions, user content
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.form.coding.system
DefinitionThe identification of the code system that defines the meaning of the symbol in the code.
Cardinality1...1
Typeuri
SummaryTrue
Requirements

Need to be unambiguous about the source of the definition of the symbol.

Comments

The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Fixed Value

http://snomed.info/sct

Mappings
  • rim: n/a
  • v2: C*E.3
  • rim: ./codeSystem
  • orim: fhir:Coding.system rdfs:subPropertyOf dt:CDCoding.codeSystem
Medication.form.coding.version
DefinitionThe version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured. and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.
Cardinality0...1
Typestring
SummaryTrue
Comments

Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: C*E.7
  • rim: ./codeSystemVersion
  • orim: fhir:Coding.version rdfs:subPropertyOf dt:CDCoding.codeSystemVersion
Medication.form.coding.code
DefinitionA symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).
Cardinality1...1
Typecode
SummaryTrue
Requirements

Need to refer to a particular code in the system.

Comments

Note that FHIR strings may not exceed 1MB in size

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: C*E.1
  • rim: ./code
  • orim: fhir:Coding.code rdfs:subPropertyOf dt:CDCoding.code
Medication.form.coding.display
DefinitionA representation of the meaning of the code in the system, following the rules of the system.
Cardinality1...1
Typestring
SummaryTrue
Requirements

Need to be able to carry a human-readable meaning of the code for readers that do not know the system.

Comments

Note that FHIR strings may not exceed 1MB in size

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: C*E.2 - but note this is not well followed
  • rim: CV.displayName
  • orim: fhir:Coding.display rdfs:subPropertyOf dt:CDCoding.displayName
Medication.form.coding.userSelected
DefinitionIndicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays).
Cardinality0...1
Typeboolean
SummaryTrue
Requirements

This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing.

Comments

Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: Sometimes implied by being first
  • rim: CD.codingRationale
  • orim: fhir:Coding.userSelected fhir:mapsTo dt:CDCoding.codingRationale. fhir:Coding.userSelected fhir:hasMap fhir:Coding.userSelected.map. fhir:Coding.userSelected.map a fhir:Map; fhir:target dt:CDCoding.codingRationale. fhir:Coding.userSelected\#true a [ fhir:source "true"; fhir:target dt:CDCoding.codingRationale\#O ]
Medication.form.text
DefinitionA human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.
Cardinality0...1
Typestring
SummaryTrue
Requirements

The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.

Comments

Very often the text is the same as a displayName of one of the codings.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: C*E.9. But note many systems use C*E.2 for this
  • rim: ./originalText[mediaType/code="text/plain"]/data
  • orim: fhir:CodeableConcept.text rdfs:subPropertyOf dt:CD.originalText
Medication.ingredient
DefinitionIdentifies a particular constituent of interest in the product.
Cardinality0...*
TypeBackboneElement
Comments

The ingredients need not be a complete list. If an ingredient is not specified, this does not indicate whether an ingredient is present or absent. If an ingredient is specified it does not mean that all ingredients are specified. It is possible to specify both inactive and active ingredients.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • rim: .scopesRole[typeCode=INGR]
Medication.ingredient.id
Definitionunique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Cardinality0...1
Typestring
Comments

Note that FHIR strings may not exceed 1MB in size

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
Medication.ingredient.extension
DefinitionMay be used to represent additional information that is not part of the basic definition of the element. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Cardinality0...*
TypeExtension
Aliasextensions, user content
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

SlicingUnordered, Open, by url(Value)
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.ingredient.modifierExtension
DefinitionMay be used to represent additional information that is not part of the basic definition of the element, and that modifies the understanding of the element that contains it. Usually modifier elements provide negation or qualification. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.
Cardinality0...*
TypeExtension
ModifierTrue
SummaryTrue
Aliasextensions, user content, modifiers
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.ingredient.item[x]
DefinitionThe actual ingredient - either a substance (simple ingredient) or another medication.
Cardinality1...1
TypeReference(Substance | ), CodeableConcept
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • script10.6: coding.code = //element(*,MedicationType)/DrugCoded/ProductCode coding.system = //element(*,MedicationType)/DrugCoded/ProductCodeQualifier coding.display = //element(*,MedicationType)/DrugDescription
  • v2: RXC-2-Component Code if medication: RXO-1-Requested Give Code / RXE-2-Give Code / RXD-2-Dispense/Give Code / RXG-4-Give Code / RXA-5-Administered Code
  • rim: .player
Medication.ingredient.isActive
DefinitionIndication of whether this ingredient affects the therapeutic action of the drug.
Cardinality0...1
Typeboolean
Requirements

True indicates that the ingredient affects the therapeutic action of the drug (i.e. active). False indicates that the ingredient does not affect the therapeutic action of the drug (i.e. inactive).

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • rim: NA
Medication.ingredient.amount
DefinitionSpecifies how many (or how much) of the items there are in this Medication. For example, 250 mg per tablet. This is expressed as a ratio where the numerator is 250mg and the denominator is 1 tablet.
Cardinality0...1
TypeRatio
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • rat-1: Numerator and denominator SHALL both be present, or both are absent. If both are absent, there SHALL be some extension present
    (numerator.empty() xor denominator.exists()) and (numerator.exists() or extension.exists())
Mappings
  • rim: n/a
  • v2: N/A
  • rim: RTO
  • script10.6: //element(*,DrugCodedType)/Strength
  • v2: RXC-3-Component Amount & RXC-4-Component Units if medication: RXO-2-Requested Give Amount - Minimum & RXO-4-Requested Give Units / RXO-3-Requested Give Amount - Maximum & RXO-4-Requested Give Units / RXO-11-Requested Dispense Amount & RXO-12-Requested Dispense Units / RXE-3-Give Amount - Minimum & RXE-5-Give Units / RXE-4-Give Amount - Maximum & RXE-5-Give Units / RXE-10-Dispense Amount & RXE-10-Dispense Units
  • rim: .quantity
Medication.package
DefinitionInformation that only applies to packages (not products).
Cardinality0...1
TypeBackboneElement
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • script10.6: no mapping
  • rim: .player[classCode=CONT]
Medication.package.id
Definitionunique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Cardinality0...1
Typestring
Comments

Note that FHIR strings may not exceed 1MB in size

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
Medication.package.extension
DefinitionMay be used to represent additional information that is not part of the basic definition of the element. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Cardinality0...*
TypeExtension
Aliasextensions, user content
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

SlicingUnordered, Open, by url(Value)
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.package.modifierExtension
DefinitionMay be used to represent additional information that is not part of the basic definition of the element, and that modifies the understanding of the element that contains it. Usually modifier elements provide negation or qualification. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.
Cardinality0...*
TypeExtension
ModifierTrue
SummaryTrue
Aliasextensions, user content, modifiers
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.package.container
DefinitionThe kind of container that this package comes as.
Cardinality0...1
TypeCodeableConcept
Binding
A coded concept defining the kind of container a medication package is packaged in
MedicationContainer (example)
Comments

Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • v2: CE/CNE/CWE
  • rim: CD
  • orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
  • script10.6: no mapping
  • rim: .code
Medication.package.content
DefinitionA set of components that go to make up the described item.
Cardinality0...*
TypeBackboneElement
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • script10.6: no mapping
  • rim: .scopesRole[typeCode=CONT]
Medication.package.content.id
Definitionunique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Cardinality0...1
Typestring
Comments

Note that FHIR strings may not exceed 1MB in size

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
Medication.package.content.extension
DefinitionMay be used to represent additional information that is not part of the basic definition of the element. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Cardinality0...*
TypeExtension
Aliasextensions, user content
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

SlicingUnordered, Open, by url(Value)
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.package.content.modifierExtension
DefinitionMay be used to represent additional information that is not part of the basic definition of the element, and that modifies the understanding of the element that contains it. Usually modifier elements provide negation or qualification. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.
Cardinality0...*
TypeExtension
ModifierTrue
SummaryTrue
Aliasextensions, user content, modifiers
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.package.content.item[x]
DefinitionIdentifies one of the items in the package.
Cardinality1...1
TypeReference(), CodeableConcept
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • script10.6: no mapping
  • rim: .player
Medication.package.content.amount
DefinitionThe amount of the product that is in the package.
Cardinality0...1
TypeSimpleQuantity
Comments

The context of use may frequently define what kind of quantity this is and therefore what kind of units can be used. The context of use may also restrict the values for the comparator.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • qty-3: If a code for the unit is present, the system SHALL also be present
    code.empty() or system.exists()
  • sqty-1: The comparator is not used on a SimpleQuantity
    comparator.empty()
Mappings
  • rim: n/a
  • v2: SN (see also Range) or CQ
  • rim: PQ, IVL<PQ>, MO, CO, depending on the values
  • script10.6: no mapping
  • rim: .quantity
Medication.package.batch
DefinitionInformation about a group of medication produced or packaged from one production run.
Cardinality0...*
TypeBackboneElement
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • script10.6: no mapping
  • rim: participation[typeCode=CSM].role[classCode=INST].scopedRole.scoper[classCode=MMAT].id
Medication.package.batch.id
Definitionunique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Cardinality0...1
Typestring
Comments

Note that FHIR strings may not exceed 1MB in size

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
Medication.package.batch.extension
DefinitionMay be used to represent additional information that is not part of the basic definition of the element. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Cardinality0...*
TypeExtension
Aliasextensions, user content
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

SlicingUnordered, Open, by url(Value)
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.package.batch.modifierExtension
DefinitionMay be used to represent additional information that is not part of the basic definition of the element, and that modifies the understanding of the element that contains it. Usually modifier elements provide negation or qualification. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.
Cardinality0...*
TypeExtension
ModifierTrue
SummaryTrue
Aliasextensions, user content, modifiers
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • ext-1: Must have either extensions or value[x], not both
    extension.exists() != value.exists()
Mappings
  • rim: n/a
  • rim: N/A
Medication.package.batch.lotNumber
DefinitionThe assigned lot number of a batch of the specified product.
Cardinality0...1
Typestring
Comments

Note that FHIR strings may not exceed 1MB in size

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • script10.6: no mapping
  • v2: RXA-15 Substance Lot Number / RXG-19 Substance Lot Number
  • rim: .id
Medication.package.batch.expirationDate
DefinitionWhen this specific batch of product will expire.
Cardinality0...1
TypedateTime
Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
Mappings
  • rim: n/a
  • script10.6: no mapping
  • v2: RXA-16 Substance Expiration Date / RXG-20 Substance Expiration Date
  • rim: participation[typeCode=CSM].role[classCode=INST].scopedRole.scoper[classCode=MMAT].expirationTime
Medication.image
DefinitionPhoto(s) or graphic representation(s) of the medication.
Cardinality0...*
TypeAttachment
Requirements

Note that "image" is only applicable when the medication.code represents a physical item (e.g. Amoxil 250 mg capsule) and not an abstract item (e.g. amoxicillin 250 mg).

Comments

When providing a summary view (for example with Observation.value[x]) Attachment should be represented with a brief display text such as "Attachment".

Invariants
  • ele-1: All FHIR elements must have a @value or children
    hasValue() | (children().count() > id.count())
  • att-1: It the Attachment has data, it SHALL have a contentType
    data.empty() or contentType.exists()
Mappings
  • rim: n/a
  • v2: ED/RP
  • rim: ED
  • rim: .participation[typeCode=SUBJ].role[classCode=MANU],source[classCode=OBS,moodCode=EVN,code="type of image"].value(ED.image)

Element: code

A code (or set of codes) that specify this medication, or a textual description if no code is available. Usage note: This could be a standard medication code such as a code from RxNorm, SNOMED CT, IDMP etc. It could also be a national or local formulary code, optionally with translations to other code systems.

All medication must be represented using NHS dm+d terminology.

  • The code.coding.system must be http://snomed.info/sct.
  • The code.coding.code must be the NHS dm+d concept code.
  • The code.coding.display must be the NHS dm+d concept description.

Element: status

The element is not required for an MVP implementation.


Element: isBrand

This element has been removed from FHIR R4 so should not be implemented as part of an STU3 or CareConnect implementation.

Within the dm+d terminology, medication that is a brand is identified as an AMP and AMPP concept.


Element: isOverTheCounter

This element has been removed from FHIR R4 so should not be implemented as part of an STU3 or CareConnect implementation.

Element: manufacturer

The element is not required for an MVP implementation.


Element: form

The element is not required for an MVP implementation.

Within the dm+d terminology, the VMP, AMP, VMPP and AMPP concepts include a coded form.

Where a medication is identified using a VTM concept and the prescriber wishes to qualify with a form then use this element.

Coded forms should be taken from either the dm+d or from the SNOMED-CT hierarchy as a descendant of the concept 736542009 Pharmaceutical dose form.


Element: ingredient

The element is not required for an MVP implementation.


Element: package

This element has been removed from FHIR R4 so should not be implemented as part of an STU3 or CareConnect implementation.

Element: image

This element has been removed from FHIR R4 so should not be implemented as part of an STU3 or CareConnect implementation.

Element: id

It is recommended this is the medication unique dm+d concept id. This use of this identifier will provide a unique mechanism to return a Medication resource in a RESTful implementation anywhere across the NHS.

For example;

<reference value="https://myFHIRserver/medication/87652004"/>


Where 87652004 in this example is the unique dm+d concept id for the Virtual Therapeutic Moiety for Atenolol.

Note: Where a medication is not within the dm+d and therefore does not have a dm+d code then the approach will be a local implementation decision. If you have a local FHIR Medication Resource server that is being used to share drug data locally then using the Medication Reference URL is OK.

If the data is being shared outside of the local environment then the Medication resource should only reference dm+d data.

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