HL7 SIU_S17 (Appointment Deletion) | Integration Soup HL7 Reference Guide

HL7 SIU_S17 Appointment Deletion

The appointment was entered in error and should not behave like a normal canceled appointment.

HL7 message structure SIU_S12 groups and segments from HL7 v2.5.1 Hide structure

These are the generated groups and segments for the version selected at the top of the page. The article explains the workflow, and this panel follows the chosen HL7 version.

Message Structure

Segment	Name	Required	Repeatable
MSH	Message Header	Yes	No
SCH	Scheduling Activity Information	Yes	No
TQ1	Timing/Quantity	No	Yes
NTE	Notes and Comments	No	Yes
SIU_S12.PATIENT	Patient group	No	Yes
PID	Patient Identification	Yes	No
PD1	Patient Additional Demographic	No	No
PV1	Patient Visit	No	No
PV2	Patient Visit - Additional Information	No	No
OBX	Observation/Result	No	Yes
DG1	Diagnosis	No	Yes
SIU_S12.RESOURCES	Resources group	Yes	Yes
RGS	Resource Group	Yes	No
SIU_S12.SERVICE	Service group	No	Yes
AIS	Appointment Information	Yes	No
NTE	Notes and Comments	No	Yes
SIU_S12.GENERAL_RESOURCE	General Resource group	No	Yes
AIG	Appointment Information - General Resource	Yes	No
NTE	Notes and Comments	No	Yes
SIU_S12.LOCATION_RESOURCE	Location Resource group	No	Yes
AIL	Appointment Information - Location Resource	Yes	No
NTE	Notes and Comments	No	Yes
SIU_S12.PERSONNEL_RESOURCE	Personnel Resource group	No	Yes
AIP	Appointment Information - Personnel Resource	Yes	No
NTE	Notes and Comments	No	Yes

SIU_S17 notifies receivers that an appointment has been deleted. In HL7 scheduling language, deletion is for appointments that were entered in error and need to be removed from the schedule so they do not affect schedule statistics or normal workflow.

S17 uses SIU^S17^SIU_S12. It shares the same SIU_S12 structure as booking, rescheduling, modification, cancellation, and no-show notification, but the business meaning is very different.

A small SIU S17 example

MSH|^~\&|SCHED|CITYHOSP|EHR|CITYHOSP|20260717103000||SIU^S17^SIU_S12|SIU170042|P|2.5.1 SCH|A100045|F100045||ERROR^Entered in error^L|DELETED|OFFICE^Office visit^L|30|min|^^^20260719113000^20260719120000|||||12345^Careful^Clara NTE|1||Appointment was created on the wrong patient and removed from the schedule. PID|1||123456^^^CITYHOSP^MR||Smith^Jane^Anne^^Ms^^L||19800314|F RGS|1 AIS|1||CARDREV^Cardiology review^L|20260719113000|30|min AIL|1||CARD^ROOM2^^CITYHOSP|20260719113000|30|min

What systems do with it

The sender is the filler schedule. Receivers remove or mark the appointment as entered-in-error, depending on their audit model. The key action is different from cancellation: the appointment should not count as a patient cancellation, clinic cancellation, no-show, or completed visit.

Systems still need to identify the appointment through SCH. Optional patient and resource groups help with audit and reconciliation, but the appointment identifiers usually drive the delete action.

How to read the structure

S17 uses the SIU_S12 structure. MSH and SCH are required, and the resource group is required. Patient details may be present when the appointment was patient-specific, but some deletion workflows may send only enough data to identify the schedule item.

If your receiver keeps deleted appointments as audit records, define whether later messages can reference the same appointment identifiers. HL7 scheduling guidance warns that delete actions can have different consequences across applications.

Implementation traps

The biggest trap is treating S17 like S15. A cancellation is normal scheduling history. A deletion is correction of an erroneous schedule entry. If analytics, reminders, or billing treat them the same, reporting gets muddy.

Deletion can also be hard to undo. Some systems physically remove the record; others keep an audit row and reject reuse of the appointment ID. Agree on that behavior before sending delete events in production.

Reference notes

Caristix describes S17 as a deletion notification for an appointment that must be removed from the schedule. HL7 Chapter 10 scheduling emphasizes that delete differs from cancel because delete corrects an erroneous entry. iNTERFACEWARE lists S17 among the shared-format SIU notification events.