What does “Sentinel event” mean?
Short answer
A sentinel event is a patient safety event that reaches a patient and causes death, severe harm or permanent harm. That is the Joint Commission's meaning.
Also known as: Joint Commission sentinel event
The official definition
The event is not mainly due to the patient's illness. Severe harm counts no matter how long it lasts. Permanent harm counts no matter how mild.
Some events count by type. Surgery on the wrong site, patient or procedure counts whatever the outcome. So does a fall, in a setting staffed around the clock, that causes any fracture, or needs surgery, casting or traction, among other results.
What you must do
Every sentinel event needs a full, systematic analysis, most often a root cause analysis. Then carry out a corrective action plan and track it. The policy sets 45 business days from the event, or from when you learn of it.
Reporting to the Joint Commission is encouraged, not required. Surveyors do not hunt for sentinel events. They do check how you respond.
Mix-up: other groups use their own terms. NQF's never events, CMS wording and state laws each have their own lists and clocks. One event can be a sentinel event, a state-reportable event, or both.
Frequently asked questions
Do we have to report a sentinel event to the Joint Commission?
No. Reporting is strongly encouraged, not required. You must still have a sentinel event policy and fully analyze every sentinel event.
How long do we have to complete the root cause analysis?
The policy expects a thorough analysis and action plan within 45 business days of the event or of learning about it.
Is every fall a sentinel event?
No. A fall counts only with a set result, like a fracture, surgery, casting or traction, a brain, nerve or internal injury needing care, or death or permanent harm.
Sources
- Joint Commission: Sentinel Event Policy (SE chapter), Comprehensive Accreditation Manual, Update 1, July 2026
- AHRQ PSNet: Never events (primer)
- AHRQ PSNet: Root cause analysis (primer)
Reviewed against the sources above on Oct 5, 2026. Rules change: confirm current requirements with the issuing body or your counsel before relying on any summary.
Put the definition to work.
IncidentKit turns these terms into workflow: reports, investigations, corrective actions and packets.