CENTER FOR CLINICAL OBSERVATIONAL INVESTIGATIONS

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NEMSIS

Organization: National Highway Traffic Safety Administration

Description

The National Emergency Medical Services Information System (NEMSIS) is a US-based national EMS database recognized as the universal resource for patient-care information resulting from 911 emergency calls.

Specifically, NEMSIS provides the framework for collecting, storing, and sharing standardized EMS data from States nationwide. These EMS data have been used for epidemiology and research studies as well as by local, state, and national EMS stakeholders to more accurately assess EMS needs and performance, as well as support better strategic planning for the EMS systems. In addition, data from NEMSIS is also used to help benchmark performance, determine the effectiveness of clinical interventions, and facilitate cost-benefit analyses.

Of important note is that the EMS data available in NEMSIS database is transport and not individual level data, which means that multiple transports may relate to a single person. The linkage between transports and patients is not available in the public data release.

Key Information

Dataset Contents
Data Date Span 2017-2023
Transport Count 264,485,635
Status of Dataset Updates Active
Dataset Type Emergency Medical Service Activations
Context Emergency Medical Service Activations
Region United States
Age Restrictions N/A
Access & Availability
Native Data Structure Custom
Hosting Hosted by data user
Database File Size 1 TB
Availability Restrictions None
Data Identifiability
Controlled Tier HIPAA: De-identified, Common Rule: De-identified

References and Resources:

Relevant Publications

  • Ehlers J, Fisher B, Peterson S, Dai M, Larkin A, Bradt L, Mann NC. Description of the 2020 NEMSIS Public-Release Research Dataset. Prehosp Emerg Care. 2023;27(4):473-481. doi: 10.1080/10903127.2022.2079779. Epub 2022 Jun 28. PMID: 35583482.
  • Williams N. Considering non-hospital data in clinical informatics use cases, a review of the National Emergency Medical Services Information System (NEMSIS). Inform Med Unlocked. 2022;35:101129. doi: 10.1016/j.imu.2022.101129. Epub 2022 Nov 9. PMID: 36532947; PMCID: PMC9757756.

Last updated Dec 12, 2024