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Emergency Medical Services


Below, you’ll find adverse and other patient safety events grouped into categories. Click on the most relevant category to see agency-by-agency descriptions of events that must be reported. This content is relevant to ambulance or emergency first response services licensed in Massachusetts. If an event occurred in the emergency department of a hospital, visit the Hospital section of the Navigator.

Note that safety-related reporting requirements imposed by the Centers for Medicare & Medicaid Services (CMS), MassHealth, or accrediting organizations are not included in the information provided here. Click here to learn more about what is and is not included in the Navigator.



Adverse Event Categories

Event Type Description
Reportable Incidents -EMS

Other Safety Reporting

Event Type Description
CMS and MassHealth Broad overview and links to resources related to conditions of coverage and participation in these programs
Drug Diversion Loss or theft of controlled substances