The National Emergency Medical Services Information System (NEMSIS) is the national system used to collect, store and share EMS data from the U.S. States and Territories. NEMSIS develops and maintains a national standard for how patient care information resulting from prehospital EMS activations is documented. This information is voluntarily submitted to the National EMS Data Repository at NEMSIS by State and Territory EMS Officials.

NEMSIS is a collaborative system to improve prehospital patient care through the standardization, aggregation, and utilization of point of care EMS data at a local, state, and national level. NEMSIS is a program of NHTSA’s Office of EMS and hosted by the University of Utah.

NEMSIS provides the framework for collecting, storing, and sharing standardized EMS data from States nationwide. The NEMSIS uniform dataset and database help local, state, and national EMS stakeholders more accurately assess EMS needs and performance, as well as support better strategic planning for the EMS systems of tomorrow. Data from NEMSIS is also used to help benchmark performance, determine the effectiveness of clinical interventions, and facilitate cost-benefit analyses.