National EMS Information System
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| National EMS Information System | |
|---|---|
| Name | National EMS Information System |
| Abbreviation | NEMSIS |
| Formation | 2001 |
| Purpose | Standardize emergency medical services data collection and exchange |
| Headquarters | Chicago, Illinois |
| Region served | United States |
National EMS Information System
The National EMS Information System is a standardized data model and repository for prehospital emergency medical services information used across the United States. It was developed to harmonize patient care reports and electronic data exchange among National Highway Traffic Safety Administration, Centers for Disease Control and Prevention, Federal Emergency Management Agency, American Medical Association, and state-level Departments of Health partners. The system supports interoperability with clinical registries, Agency for Healthcare Research and Quality initiatives, and public health surveillance such as National Notifiable Diseases Surveillance System.
Overview
NEMSIS defines a uniform set of data elements, an XML schema, and a national data warehouse to collect and analyze emergency medical services encounters documented by affiliates like American Red Cross, American Heart Association, Institute of Medicine, and state emergency medical services offices such as California Emergency Medical Services Authority and New York State Department of Health. The model aligns with health IT standards promulgated by Office of the National Coordinator for Health Information Technology, integrates mapping and location coding from National Geospatial-Intelligence Agency, and enables research collaborations with institutions such as Johns Hopkins University, Harvard School of Public Health, and Mayo Clinic.
History and Development
Development began after recommendations from national stakeholders including the National Association of State EMS Officials, National Association of Emergency Medical Technicians, and the National EMS Advisory Council. Funding and programmatic leadership originated with the National Highway Traffic Safety Administration in the early 2000s, and technical guidance incorporated work from Centers for Disease Control and Prevention surveillance programs and informatics groups at University of Utah Health Sciences Center and University of Pittsburgh Medical Center. Major milestones include release of versioned data standards, buildout of state data repositories in places like Texas Department of State Health Services and Florida Department of Health, and adoption by federal partners such as Department of Homeland Security for disaster response interoperability.
Standards and Data Elements
The NEMSIS model prescribes standardized elements including patient demographics, incident location, dispatch information, clinical impressions, procedures, medications, and outcomes. The element set maps to terminologies from SNOMED CT, LOINC, RxNorm, and the ICD family for diagnostic coding. Schema versions are maintained to ensure compatibility with Health Level Seven International standards and the National Council for Prescription Drug Programs where medication history intersects with EMS care. The standard accommodates context from National Incident Management System events and integrates with registries like the Traumatic Brain Injury Model Systems and Stroke Systems of Care initiatives.
Implementation and Use
State EMS offices, vendors, and agencies such as Los Angeles County Fire Department, Chicago Fire Department, and private providers like Falck USA implement the NEMSIS standard through electronic patient care reporting software certified by bodies like UL LLC and used in quality programs run by American College of Emergency Physicians and Society for Academic Emergency Medicine. Data flow typically moves from local EMS agency systems to state data repositories and onward to the national data warehouse, enabling analysis by researchers at Centers for Disease Control and Prevention, policy evaluation by Congressional Research Service, and public health response coordination with Federal Emergency Management Agency during incidents like Hurricane Katrina and the COVID-19 pandemic in the United States.
Governance and Funding
Governance involves partnerships among federal agencies including the National Highway Traffic Safety Administration and advisory input from organizations such as the National Association of State EMS Officials, National Association of Emergency Medical Technicians, and academic steering committees from Duke University School of Medicine and University of Washington. Funding has combined federal grants, cooperative agreements, state contributions, and private foundations including support mechanisms similar to those used by Robert Wood Johnson Foundation for health data initiatives. Vendor engagement and membership models mirror cooperative structures seen in entities like Health Level Seven International and regional health information exchanges such as Indiana Health Information Exchange.
Privacy, Security, and Legal Issues
Implementation requires compliance with HIPAA privacy rules and state statutes governing patient records administered by entities such as the Office for Civil Rights. Data sharing agreements, role-based access, and technical safeguards reflect standards from National Institute of Standards and Technology publications and coordination with statewide agencies like Massachusetts Department of Public Health. Legal questions have arisen related to disclosure in medicolegal contexts, subpoenas served to EMS providers, and interoperability across jurisdictions governed by laws such as the Emergency Medical Treatment and Labor Act and state emergency management statutes.
Impact and Evaluation
NEMSIS enables large-scale epidemiologic studies, quality improvement initiatives, and economic analyses performed by researchers at Harvard Medical School, Columbia University Mailman School of Public Health, and University of California, San Francisco. Analyses of injury patterns, cardiac arrest outcomes, and opioid overdose response have informed guidelines by the American Heart Association and policy recommendations from the Institute of Medicine. Continuous evaluation by entities like the Government Accountability Office and independent academic audits assesses data completeness, timeliness, and representativeness, influencing adoption across states including Ohio Department of Health and Pennsylvania Department of Health.