# Sentinel event

> 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.

Source: https://incidentkit.ai/glossary/sentinel-event · Updated Oct 5, 2026

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.

> These words come from the Update 1 (July 2026) Joint Commission policy. It changes over time, so check the manual you follow.

## What you must do

Every sentinel event needs a full, systematic analysis, most often a [root cause analysis](https://incidentkit.ai/glossary/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](https://incidentkit.ai/glossary/never-event), 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](https://www.jointcommission.org/-/media/tjc/documents/resources/patient-safety-topics/sentinel-event/camncc_20_se_all_current.pdf)
- [AHRQ PSNet: Never events (primer)](https://psnet.ahrq.gov/primer/never-events)
- [AHRQ PSNet: Root cause analysis (primer)](https://psnet.ahrq.gov/primer/root-cause-analysis)

## Related terms

- [Adverse event](https://incidentkit.ai/glossary/adverse-event)
- [Never event](https://incidentkit.ai/glossary/never-event)
- [Root cause analysis](https://incidentkit.ai/glossary/root-cause-analysis)
- [Joint Commission](https://incidentkit.ai/glossary/joint-commission)
- [Harm scale](https://incidentkit.ai/glossary/harm-scale)
- [Elopement](https://incidentkit.ai/glossary/elopement)

## Related

- [Joint Commission sentinel event policy: definition and RCA](https://incidentkit.ai/compliance/reporting-deadlines/sentinel-events)
- [What is a sentinel event? Definition, examples, response](https://incidentkit.ai/blog/what-is-a-sentinel-event)
- [Joint Commission accreditation: surveys and sentinel events](https://incidentkit.ai/compliance/accreditation/joint-commission)
- [Root cause analysis and CAPA: methods and strong actions](https://incidentkit.ai/guides/root-cause-analysis-and-capa-guide)
- [Root Cause Analysis: How to Run One That Leads to Action](https://incidentkit.ai/use-cases/root-cause-analysis)
- [Fall Reporting: What to Record and Review After a Fall](https://incidentkit.ai/use-cases/fall-reporting)