Segment DG1 to EpisodeOfCare Map - HL7 Version 2 to FHIR v1.0.0

HL7 Version 2 to FHIR
1.0.0 - STU 1 International flag

This page is part of the HL7 Version 2 to FHIR (v1.0.0: STU1) based on FHIR (HL7® FHIR® Standard) R4. This is the current published version. For a full list of available versions, see the Directory of published versions

ConceptMap: Segment DG1 to EpisodeOfCare Map (Experimental)

Official URL: http://hl7.org/fhir/uv/v2mappings/ConceptMap/segment-dg1-to-episodeofcare				Version: 1.0.0
Standards status: Informative				Computable Name: SegmentDG1ToEpisodeOfCare
Copyright/Legal: Copyright (c) 2025, HL7 International, Inc., All Rights Reserved.

This ConceptMap represents a mapping from the HL7 V2 Segment DG1 to the FHIR EpisodeOfCare Resource.

This ConceptMap represents the mapping from the HL7 V2 DG1 Segment to the FHIR EpisodeOfCare Resource. 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	Extension	Data Type	Cardinality - Min	Cardinality - Max	Data Type Mapping	Vocabulary Mapping (IS, ID, CE, CEN, CWE)	Assignment	Comments
1	DG1-1	Set ID	SI	1	1												Doesn't warrant mapping
2	DG1-2	Diagnosis Coding Method	ID	1	1												Doesn't warrant mapping
3	DG1-3	Diagnosis Code	CWE	1	1				EpisodeOfCare.diagnosis.condition(EpisodeOfCare.Condition.code)		CodeableConcept	0	1	CWE[CodeableConcept]
4	DG1-4	Diagnosis Description	ST	0	1				EpisodeOfCare.diagnosis.condition(EpisodeOfCare.Condition.code.text)			0	1				Doesn't warrant mapping
5	DG1-5	Diagnosis Date/Time	DTM	0	1				EpisodeOfCare.diagnosis.condition(EpisodeOfCare.Condition.onsetDateTime)		dateTime	0	1				Should confirm that these two concepts are equivalent. Condition.recordedDate is also available
6	DG1-6	Diagnosis Type	CWE	1	1				EpisodeOfCare.diagnosis.role		CodeableConcept	0	1	CWE[CodeableConcept]	DiagnosisType
7	DG1-7	Major Diagnostic Category	CE	0	1
8	DG1-8	Diagnostic Related Group	CE	0	1
9	DG1-9	DRG Approval Indicator	ID	0	1
10	DG1-10	DRG Grouper Review Code	IS	0	1
11	DG1-11	Outlier Type	CE	0	1
12	DG1-12	Outlier Days	NM	0	1
13	DG1-13	Outlier Cost	CP	0	1
14	DG1-14	Grouper Version And Type	ST	0	1
15	DG1-15	Diagnosis Priority	NM	0	1				EpisodeOfCare.diagnosis.rank		positiveInt	0	1				Could contribute to Condition.category or be a new extension
16	DG1-16	Diagnosing Clinician	XCN	0	-1				EpisodeOfCare.diagnosis.condition(EpisodeOfCare.Condition.asserter(EpisodeOfCare.Practitioner)		Reference	0	1	XCN[Practitioner]			While DG1-16 can repeat, we are not aware of instances where this is used. Until such time, we will not yet establish an agreed to method to communicate the extra repeats in FHIR.
17	DG1-17	Diagnosis Classification	CWE	0	1
18	DG1-18	Confidential Indicator	ID	0	1
19	DG1-19	Attestation Date/Time	DTM	0	1				EpisodeOfCare.diagnosis.condition(EpisodeOfCare.Condition.extension.url)		uri	1	1			"http://hl7.org/fhir/StructureDefinition/condition-assertedDate"
19	DG1-19	Attestation Date/Time	DTM	0	1				EpisodeOfCare.diagnosis.condition(EpisodeOfCare.Condition.extension.valueDateTime)		dateTime	1	1				It is unclear whether to use recorded or asserted date. What is your opinion?
19	DG1-19	Attestation Date/Time	DTM	0	1				EpisodeOfCare.diagnosis.condition(EpisodeOfCare.Condition.recordedDate)		dateTime	0	1				It is unclear whether to use recorded or asserted date. What is your opinion?
20	DG1-20	Diagnosis Identifier	EI	0	1				EpisodeOfCare.diagnosis.condition(EpisodeOfCare.Condition.identifier)		Identifier	0	-1	EI[Identifier-Extension]			We should confirm that this is truly a unique ID before it gets used as .id. It may need to be combined with a visit ID to make it fully unique.
21	DG1-21	Diagnosis Action Code	ID	0	1				EpisodeOfCare.diagnosis.condition(EpisodeOfCare.Condition.verificationStatus.coding.code)		code	0	1			"entered-in-error"	Other values (A and U) don't map to anything
21	DG1-21	Diagnosis Action Code	ID	0	1				EpisodeOfCare.diagnosis.condition(EpisodeOfCare.Condition.verificationStatus.coding.system)		uri	0	1			"http://terminology.hl7.org/CodeSystem/condition-ver-status"
22	DG1-22	Parent Diagnosis	EI	0	1				EpisodeOfCare.diagnosis.condition(EpisodeOfCare.Condition.extension.url)							"http://hl7.org/fhir/StructureDefinition/condition-dueTo"
22	DG1-22	Parent Diagnosis	EI	0	1				EpisodeOfCare.diagnosis.condition(EpisodeOfCare.Condition.extension.valueReference(EpisodeOfCare.Condition)		Reference	0	1	EI[Condition]			Extensions for occurredFollowing and related also exist
23	DG1-23	DRG CCL Value Code	CWE	0	1
24	DG1-24	DRG Grouping Usage	ID	0	1
25	DG1-25	DRG Diagnosis Determination Status	CWE	0	1
26	DG1-26	Present On Admission (POA) Indicator	CWE	0	1												This could contribute to Condition.category, if that value set it extended to include multiple types of diagnoses

Mapping from (not specified) to (not specified)

Group 1 Mapping from unspecified code system to unspecified code system

Source Code

Relationship

Target Code

Comment

DG1-3 (Diagnosis Code)

is equivalent to

diagnosis.condition(Condition.code)

DG1-4 (Diagnosis Description)

is equivalent to

diagnosis.condition(Condition.code.text)

Doesn't warrant mapping

DG1-5 (Diagnosis Date/Time)

is equivalent to

diagnosis.condition(Condition.onsetDateTime)

Should confirm that these two concepts are equivalent. Condition.recordedDate is also available

DG1-6 (Diagnosis Type)

is equivalent to

diagnosis.role

DG1-15 (Diagnosis Priority)

is equivalent to

diagnosis.rank

Could contribute to Condition.category or be a new extension

DG1-16 (Diagnosing Clinician)

is equivalent to

diagnosis.condition(Condition.asserter(Practitioner)

While DG1-16 can repeat, we are not aware of instances where this is used. Until such time, we will not yet establish an agreed to method to communicate the extra repeats in FHIR.

DG1-19 (Attestation Date/Time)

is equivalent to

diagnosis.condition(Condition.extension[1].url)

DG1-19 (Attestation Date/Time)

is equivalent to

diagnosis.condition(Condition.extension[1].valueDateTime)

It is unclear whether to use recorded or asserted date. What is your opinion?

DG1-19 (Attestation Date/Time)

is equivalent to

diagnosis.condition(Condition.recordedDate)

It is unclear whether to use recorded or asserted date. What is your opinion?

DG1-20 (Diagnosis Identifier)