HL7 v2 2.1

Message structures of version 2.1: segments and groups in the order the standard requires. Structures with a FHIR message map link to it.

Version2.1 2.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

Filter message structures

Indented rows belong to the group above them.

ADT_A01MSH EVN PID NK1 PV1 DG1FHIR: Bundle6 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
NK1	Next Of Kin	Required	Once
PV1	Patient Visit	Required	Once
DG1	Diagnosis	Optional	Once

FHIR map of ADT_A01Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A02MSH EVN PID PV1FHIR: Bundle4 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once

FHIR map of ADT_A02Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A03MSH EVN PID PV14 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A04MSH EVN PID NK1 PV1 DG16 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
NK1	Next Of Kin	Required	Once
PV1	Patient Visit	Required	Once
DG1	Diagnosis	Optional	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A05MSH EVN PID NK1 PV1 DG1FHIR: Bundle6 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
NK1	Next Of Kin	Required	Once
PV1	Patient Visit	Required	Once
DG1	Diagnosis	Optional	Once

FHIR map of ADT_A05Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A06MSH EVN PID PV1FHIR: Bundle4 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once

FHIR map of ADT_A06Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A07MSH EVN PID PV14 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A08MSH EVN PID NK1 PV1 DG16 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
NK1	Next Of Kin	Required	Once
PV1	Patient Visit	Required	Once
DG1	Diagnosis	Optional	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A09MSH EVN PID PV1 DG1FHIR: Bundle5 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once
DG1	Diagnosis	Optional	Once

FHIR map of ADT_A09Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A10MSH EVN PID PV1 DG15 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once
DG1	Diagnosis	Optional	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A11MSH EVN PID PV1 DG1FHIR: Bundle5 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once
DG1	Diagnosis	Optional	Once

FHIR map of ADT_A11Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A12MSH EVN PID PV1 DG15 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once
DG1	Diagnosis	Optional	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A13MSH EVN PID PV1 DG15 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once
DG1	Diagnosis	Optional	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A14MSH EVN PID PD1 NK1 PV1 DG17 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PD1	Patient Demographics	Required	Once
NK1	Next Of Kin	Required	Once
PV1	Patient Visit	Required	Once
DG1	Diagnosis	Optional	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A15MSH EVN PID PV1 DG15 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once
DG1	Diagnosis	Optional	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A16MSH EVN PID PV1 DG15 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once
DG1	Diagnosis	Optional	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A17MSH EVN PID PV1FHIR: Bundle4 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
Group `PATIENT`		Required	Repeats
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once

FHIR map of ADT_A17Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A18MSH EVN PID MRG PV15 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
MRG	Merge Patient Information	Required	Once
PV1	Patient Visit	Optional	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6

ADT_A20MSH EVN NPU3 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
NPU	Non-patient Update	Required	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A21MSH EVN PID PV14 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A22MSH EVN PID PV14 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A23MSH EVN PID PV14 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ADT_A24MSH EVN PID PV14 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Required	Once
PID	Patient Identification	Required	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

BAR_P01MSH EVN PID PV1 DG1 PR1 GT1 NK1 …11 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
Group `VISIT`		Required	Repeats
PV1	Patient Visit	Optional	Once
DG1	Diagnosis	Optional	Repeats
PR1	Procedures	Optional	Repeats
GT1	Guarantor	Optional	Repeats
NK1	Next Of Kin	Optional	Repeats
IN1	Insurance	Optional	Repeats
ACC	Accident	Optional	Once
UB1	Ub82 Data	Optional	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

BAR_P02MSH EVN PID PV14 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
Group `PATIENT`		Required	Repeats
PID	Patient Identification	Required	Once
PV1	Patient Visit	Optional	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

DFT_P03MSH EVN PID PV1 FT15 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
EVN	Event Type	Required	Once
PID	Patient Identification	Required	Once
PV1	Patient Visit	Optional	Once
FT1	Financial Transaction	Optional	Repeats

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

DSR_Q03MSH QRD QRF DSP DSC5 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
QRD	Query Definition	Required	Once
QRF	Query Filter	Optional	Once
DSP	Display Data	Required	Repeats
DSC	Continuation Pointer	Required	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6

ORM_O01MSH NTE PID PV1 ORC OBR OBX BLGFHIR: Bundle8 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
NTE	Notes And Comments	Optional	Repeats
Group `PATIENT`		Optional	Once
PID	Patient Identification	Required	Once
NTE	Notes And Comments	Optional	Repeats
PV1	Patient Visit	Optional	Once
Group `ORDER`		Required	Repeats
ORC	Common Order	Required	Once
Group `ORDER_DETAIL`		Optional	Once
OBR	Observation Request	Required	Once
NTE	Notes And Comments	Optional	Repeats
OBX	Result	Optional	Repeats
NTE	Notes And Comments	Optional	Repeats
BLG	Billing	Optional	Once

FHIR map of ORM_O01Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6

ORR_O02MSH MSA NTE PID ORC OBR6 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
MSA	Message Acknowledgment	Required	Once
NTE	Notes And Comments	Optional	Repeats
Group `PATIENT`		Optional	Once
PID	Patient Identification	Optional	Once
NTE	Notes And Comments	Optional	Repeats
Group `ORDER`		Required	Repeats
ORC	Common Order	Required	Once
Group `ORDER_DETAIL`		Optional	Once
OBR	Observation Request	Required	Once
NTE	Notes And Comments	Optional	Repeats

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6

ORU_R01MSH PID NTE PV1 ORC OBR OBX DSCFHIR: Bundle8 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
Group `PATIENT_RESULT`		Required	Repeats
Group `PATIENT`		Optional	Once
PID	Patient Identification	Required	Once
NTE	Notes And Comments	Optional	Repeats
PV1	Patient Visit	Optional	Once
Group `ORDER_OBSERVATION`		Required	Repeats
ORC	Common Order	Optional	Once
OBR	Observation Request	Required	Once
NTE	Notes And Comments	Optional	Repeats
Group `OBSERVATION`		Required	Repeats
OBX	Result	Optional	Once
NTE	Notes And Comments	Optional	Repeats
DSC	Continuation Pointer	Optional	Once

FHIR map of ORU_R01Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8

ORU_R03MSH PID NTE PV1 ORC OBR OBX DSC8 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
Group `PATIENT_RESULT`		Required	Repeats
Group `PATIENT`		Optional	Once
PID	Patient Identification	Required	Once
NTE	Notes And Comments	Optional	Repeats
PV1	Patient Visit	Optional	Once
Group `ORDER_OBSERVATION`		Required	Repeats
ORC	Common Order	Optional	Once
OBR	Observation Request	Required	Once
NTE	Notes And Comments	Optional	Repeats
Group `OBSERVATION`		Required	Repeats
OBX	Result	Optional	Once
NTE	Notes And Comments	Optional	Repeats
DSC	Continuation Pointer	Optional	Once

QRY_A19MSH QRD2 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
QRD	Query Definition	Required	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6

QRY_Q01MSH QRD QRF DSC4 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
QRD	Query Definition	Required	Once
QRF	Query Filter	Optional	Once
DSC	Continuation Pointer	Required	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6

QRY_Q02MSH QRD QRF DSC4 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
QRD	Query Definition	Required	Once
QRF	Query Filter	Optional	Once
DSC	Continuation Pointer	Required	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6

UDM_Q05MSH URD URS DSP DSC5 segments

Segment	Name	Use	Repeats
MSH	Message Header	Required	Once
URD	Results/update Definition	Required	Once
URS	Unsolicited Selection	Optional	Once
DSP	Display Data	Required	Repeats
DSC	Continuation Pointer	Required	Once

Defined in versions2.12.2 2.3 2.3.1 2.4 2.5 2.5.1 2.6 2.7 2.7.1 2.8