Dataset Components & Requirements

A four piece puzzle Link to EMS Dataset Description Link to Demographic Dataset DescriptionLink to XSD Standard Description The EMS Uniform PreHospital Dataset Version 2.2.1 consists of three separate components:

Within the Version 2.2.1 documents, the recommended National EMS Dataset to be collected at the national level for every EMS Patient Encounter is noted by a “National Element” notation within the Data Dictionary. States at a minimum MUST collect the data elements that are noted in the dictionary as a "National Element."

The NEMSIS Technical Assistance Center will be creating a plan to receive comments and changes for future updates to the dataset.


EMS Dataset Overview

EMS Dataset Puzzle PieceThe EMS Dataset is a subset of information describing a complete EMS event. This includes information which is considered important from an EMS system, EMS personnel, and an EMS patient's perspective. The data elements within the EMS dataset provide documentation of the system performance and clinical care.

Many data elements are a component of an EMS Medical Record, and the majority of the remaining data elements are important for quality management and performance improvement initiatives.

The EMS dataset also includes information associated with EMS billing and reimbursement. This information is typically completed by EMS personnel for each patient encounter, although some of the information can be obtained electronically from the dispatch center, past EMS medical records, or medical devices.


Demographic Dataset Overview

Demographic Dataset Puzzle PieceThe Demographic Dataset is a subset of information describing each EMS agency, EMS personnel, and important system information that is needed to generate reports at the local, state, and national level.

This information is typically completed and reviewed once per year and updated as changes for an EMS system or for any EMS personnel occur. This information is not collected with each patient encounter, but is electronically attached to each patient encounter to make the data more useful and allow more efficient documentation by EMS personnel.


The XSD Standard

XSD Standard Puzzle PieceThe XML Schema definitions for the EMS NHTSA Version 2.2.1 Dataset are defined in the Dataset Schemas listed above.

Within these XSD files, each of the over 400 data elements are defined to allow standardized data exchange between EMS data systems. (See the XML Data Portablility Diagram.)



Explanation of XML

XML: eXtensible Markup Language provides the format to store and move data from one location to another.

Explanation of XSD

XSD: XML Schema Definition provides a definition on how the data will look and be formatted (e.g. Age is a numeric field and can only be between 0-125).