^S17
SIU^S17 — Notification of Appointment Deletion
SIU^S17 instructs downstream systems to delete an appointment record entirely. It is a data correction event used when an appointment was created in error and needs to be completely removed from the receiving system's database, not just cancelled.
When Is This Sent?
When an appointment is deleted from the scheduling system due to a data entry error or system correction — the appointment should never have existed. This is distinct from cancellation, which preserves the cancelled record for auditing.
Real-World Usage
SIU^S17 is rarely used in routine scheduling but is important for interface maintenance and data cleanup. It typically originates from an IT administrator correcting erroneous appointment records. Most downstream systems handle S17 by marking the appointment as deleted or removing it from active views. Confirm with the RIS vendor whether S17 triggers a physical deletion or a logical soft-delete.
Message Structure
Segment names link to their field-level reference pages.
Example Message
Realistic example with fake patient data. Paste into the HL7 Message Viewer to explore interactively.
1MSH||^~\&|EPIC_SCHED|HOSPITAL_A|MIRTH_PROD|RIS|20260315090000||SIU^S17^SIU_S17|SCH00025|P|2.5.1 2SCH||APT20260314ERR^EPIC_SCHED
Troubleshooting Scenarios
SIU^S17 received but appointment still visible in downstream system
Cause
The downstream system does not implement S17 deletion logic — it may only process S12, S13, S14.
Fix
Check downstream system's SIU event support list. If S17 is unsupported, use S13 (cancel) as the equivalent. Contact the vendor about S17 support or use an admin tool to manually remove the erroneous record.
S17 deletes appointment but associated DICOM studies are orphaned
Cause
Deleting an appointment in the RIS via S17 did not trigger removal of the associated worklist entry or DICOM study link.
Fix
Verify the RIS S17 handler also removes MWL entries and unlinks associated DICOM studies. For DICOM studies that were already acquired, manual retraction via PACS admin may be required.
Common Confusions
SIU^S17 (Delete) vs SIU^S13 (Cancel). Cancellation preserves the appointment record with a cancelled status — useful for audit trails. Deletion removes the record entirely. Use S13 for routine patient-requested cancellations; use S17 only for erroneous records that should not have been created. Most scheduling interfaces only implement S12/S13/S14.
Related Message Types
Segment Reference
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