Datatype CX to Identifier Map - HL7 Version 2 to FHIR v1.0.0

HL7 Version 2 to FHIR
1.0.0 - STU 1 International flag

HL7 Version 2 to FHIR, published by HL7 International / Orders and Observations. This guide is not an authorized publication; it is the continuous build for version 1.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/v2-to-fhir/ and changes regularly. See the Directory of published versions

ConceptMap: Datatype CX to Identifier Map (Experimental)

Official URL: http://hl7.org/fhir/uv/v2mappings/ConceptMap/datatype-cx-to-identifier				Version: 1.0.0
Standards status: Informative				Computable Name: DatatypeCXToIdentifier
Copyright/Legal: Copyright (c) 2025, HL7 International, Inc., All Rights Reserved.

This ConceptMap represents a mapping from the HL7 V2 Datatype CX to the FHIR Identifier Data Type.

This ConceptMap represents the mapping from the HL7 V2 CX Data Type to the FHIR Identifier Data Type. See also the FHIR Shorthand or the CSV Source.

HL7 v2						Condition (IF True, args)			HL7 FHIR								Comments
Sort Order	Identifier	Name	Data Type	Cardinality - Min	Cardinality - Max	Computable ANTLR	Computable FHIRPath	Narrative	FHIR Attribute	Proposed Extension	Data Type	Cardinality - Min	Cardinality - Max	Data Type Mapping	Vocabulary Mapping (IS, ID, CE, CEN, CWE)	Assignment	Comments
1	CX.1	ID Number	ST	1	1				Identifier.value		string	0	1
2	CX.2	Identifier Check Digit	ST	0	1				Identifier.extension.url		uri	0	1			"http://hl7.org/fhir/StructureDefinition/identifier-checkDigit"
2	CX.2	Identifier Check Digit	ST	0	1				Identifier.extension.valueString		string	1	1
3	CX.3	Check Digit Scheme	ID	0	1				Identifier.extension.url		uri	0	1			"http://hl7.org/fhir/StructureDefinition/namingsystem-checkDigit"
3	CX.3	Check Digit Scheme	ID	0	1				Identifier.extension.valueString		string	1	1
4	CX.4	Assigning Authority	HD	0	1			If not in http://hl7.org/implement/standards/fhir/identifier-registry.html then determine whether organization or system	Identifier.assigner(Identifier.Organization)		Reference(Identifier.Organization)	0	1	HD[Organization]
4	CX.4	Assigning Authority	HD	0	1	IF CX.4 IN http://hl7.org/implement/standards/fhir/identifier-registry.html			Identifier.system		uri	0	1	HD[uri]			Typically the assigning authority reflects an organization, but if it is an actual system (EHR 1 vs. EHR 2, both supporting the same organization where one cannot get more specific), then CX.4 should be mapped to .system
5	CX.5	Identifier Type Code	ID	1	1				Identifier.type.coding.code		code	0	1		IdentifierType
6	CX.6	Assigning Facility	HD	0	1					extension??-assigningFacility	Reference(Identifier.Organization)	0	1	HD[Organization]
7	CX.7	Effective Date	DT	0	1				Identifier.period.start		dateTime	0	1
8	CX.8	Expiration Date	DT	0	1				Identifier.period.end		dateTime	0	1
9	CX.9	Assigning Jurisdiction	CWE	0	1
10	CX.10	Assigning Agency or Department	CWE	0	1
11	CX.11	Security Check	ST	0	1
12	CX.12	Security Check Scheme	ID	0	1

Mapping from (not specified) to (not specified)

Group 1 Mapping from unspecified code system to unspecified code system

Source Concept Details

Relationship

Target Concept Details

Comment

Codes from

NarrativeCondition

ComputableANTLR

Codes from

CX.1

ID Number

is equivalent to

value

CX.2

Identifier Check Digit

is equivalent to

extension[1].url

CX.2

Identifier Check Digit

is equivalent to

extension[1].valueString

CX.3

Check Digit Scheme

is equivalent to

extension[2].url

CX.3

Check Digit Scheme

is equivalent to

extension[2].valueString

CX.4

Assigning Authority

If not in http://hl7.org/implement/standards/fhir/identifier-registry.html then determine whether organization or system

is equivalent to

assigner(Organization)

CX.4

Assigning Authority

IF CX.4 IN http://hl7.org/implement/standards/fhir/identifier-registry.html

is equivalent to

system

Typically the assigning authority reflects an organization, but if it is an actual system (EHR 1 vs. EHR 2, both supporting the same organization where one cannot get more specific), then CX.4 should be mapped to .system

CX.5

Identifier Type Code

is equivalent to

type.coding.code

CX.7

Effective Date

is equivalent to

period.start

CX.8

Expiration Date

is equivalent to

period.end