Adverse events 

Prior to July 2017 NASO published a summary of adverse event reports from emergency ambulance providers. Since then, emergency ambulance providers are expected to provide a publicly available summary report on their website. 

Emergency ambulance providers assign all adverse events a Severity Assessment Code (SAC) rating to determine the severity of the event. The provider notifies NASO within five working days of a SAC1 or SAC2 event.

Find out more about the SAC rating and triage tool on the HQSC website.


Clinical and Technical Advisory Group

Adverse event reports

Martin Jenkin's Review of St John Funding Report

Emergency road ambulance service funding report

Historical Ambulance Performance Reports

NASO receive performance data from emergency ambulance providers as part of requirements within their service contract. 

The reports show Key Performance Indicators (KPI) related to response time targets as well as information about variations on demand, quality of service, and type of calls received.

For more information about these reports please contact

Pātiki and Waharua Kōpito patterns

Generic contracts

For more information on ambulance service contracts, contact