Medicolegal Death Investigation (MDI) FHIR Implementation Guide
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Medicolegal Death Investigation (MDI) FHIR Implementation Guide, published by HL7 International / Public Health. This guide is not an authorized publication; it is the continuous build for version 3.0.0-draft built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-mdi-ig/ and changes regularly. See the Directory of published versions

Extension: Tracking Number

Official URL: http://hl7.org/fhir/us/mdi/StructureDefinition/Extension-tracking-number Version: 3.0.0-draft
Standards status: Trial-use Active as of 2025-07-24 Maturity Level: 3 Computable Name: ExtensionTrackingNumber
Other Identifiers: OID:2.16.840.1.113883.4.642.40.11.42.14

Tracking number, such as a case number or file number assigned by an MDI CMS or EDRS, and can represent other tracking numbers, if required.

Context of Use

Usage info

Usages:

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

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

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Tracking Numbers Extension
... extension 0..0
... url S 1..1 uri "http://hl7.org/fhir/us/mdi/StructureDefinition/Extension-tracking-number"
... value[x] S 0..1 Identifier Value of extension
.... type S 0..1 CodeableConcept Tracking Number Type (extensible value set)
Binding: Tracking Number Type (extensible)
.... system S 0..1 uri The namespace for the identifier value
.... value S 0..1 string The value that is unique

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Tracking Numbers Extension
... id 0..1 string Unique id for inter-element referencing
... extension 0..0
... url S 1..1 uri "http://hl7.org/fhir/us/mdi/StructureDefinition/Extension-tracking-number"
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... use ?!Σ 0..1 code usual | official | temp | secondary | old (If known)
Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known .
.... type SΣ 0..1 CodeableConcept Tracking Number Type (extensible value set)
Binding: Tracking Number Type (extensible)
.... system SΣ 0..1 uri The namespace for the identifier value
Example General: http://www.acme.com/identifiers/patient
.... value SΣ 0..1 string The value that is unique
Example General: 123456
.... period Σ 0..1 Period Time period when id is/was valid for use
.... assigner Σ 0..1 Reference(Organization) Organization that issued id (may be just text)

doco Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type Identifier: Tracking number, such as a case number or file number assigned by an MDI CMS or EDRS, and can represent other tracking numbers, if required.

Maturity: 3

Differential View

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Tracking Numbers Extension
... extension 0..0
... url S 1..1 uri "http://hl7.org/fhir/us/mdi/StructureDefinition/Extension-tracking-number"
... value[x] S 0..1 Identifier Value of extension
.... type S 0..1 CodeableConcept Tracking Number Type (extensible value set)
Binding: Tracking Number Type (extensible)
.... system S 0..1 uri The namespace for the identifier value
.... value S 0..1 string The value that is unique

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Tracking Numbers Extension
... id 0..1 string Unique id for inter-element referencing
... extension 0..0
... url S 1..1 uri "http://hl7.org/fhir/us/mdi/StructureDefinition/Extension-tracking-number"
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... use ?!Σ 0..1 code usual | official | temp | secondary | old (If known)
Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known .
.... type SΣ 0..1 CodeableConcept Tracking Number Type (extensible value set)
Binding: Tracking Number Type (extensible)
.... system SΣ 0..1 uri The namespace for the identifier value
Example General: http://www.acme.com/identifiers/patient
.... value SΣ 0..1 string The value that is unique
Example General: 123456
.... period Σ 0..1 Period Time period when id is/was valid for use
.... assigner Σ 0..1 Reference(Organization) Organization that issued id (may be just text)

doco Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type Identifier: Tracking number, such as a case number or file number assigned by an MDI CMS or EDRS, and can represent other tracking numbers, if required.

Maturity: 3

 

Other representations of profile: CSV, Excel, Schematron

Terminology Bindings

PathConformanceValueSetURI
Extension.value[x].userequiredIdentifierUse
http://hl7.org/fhir/ValueSet/identifier-use|4.0.1
From the FHIR Standard
Extension.value[x].typeextensibleVSTrackingNumberType
http://hl7.org/fhir/us/mdi/ValueSet/vs-tracking-number-type
From this IG

Constraints

IdGradePath(s)DetailsRequirements
ele-1error**ALL** elementsAll FHIR elements must have a @value or children
: hasValue() or (children().count() > id.count())
ext-1error**ALL** extensionsMust have either extensions or value[x], not both
: extension.exists() != value.exists()