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The National Death Index (NDI) is a resource to help researchers find out if participants in their studies have died. NDI also can help researchers learn selected mortality information for study participants' deaths.
There are 4 types of National Death Index (NDI) searches. Every search type returns the date of death, state of death, and death certificate number for all matches. NDI Plus searches also return the cause of death.
NCHS has linked data from various surveys with death certificate records from the National Death Index (NDI). Linkage of the NCHS survey participant data with the NDI mortality data provides the opportunity to conduct a vast array of outcome studies designed to investigate the association of a wide variety of health factors with mortality.
The National Death Index (NDI) can help you find out who in your study has died by linking your datasets to death certificate information for your study subjects.
As an added precaution, it is strongly recommended that you destroy any identifiable death record information, especially coded causes of death, associated with those NDI record matches that you subsequently determine to be FALSE matches.
Follow these steps to submit an application to the National Death Index (NDI). Only eligible projects can apply to use NDI data.
The National Death Index (NDI), a self-supporting service of NCHS, is a component of the National Vital Statistics System. NDI is a centralized database of death record information compiled from data received from state vital statistics offices.
Review the National Death Index (NDI) resources on this page, the basic NDI eligibility criteria, and the step-by-step NDI application instructions.
National Hospital Care Survey Data Linkages plus icon. Linked NHCS-NDI Mortality Data; Linked NHCS-CMS Medicare Data; Linked NHCS-CMS Medicaid Data; Linked NHCS-HUD Housing Assistance Program Data; Linked NHCS-VA Administrative Data Files; National Ambulatory Medical Care Survey Data Linkages plus icon. Linked NAMCS HC Component - NDI Data
the National Death Index User’s Guide. His vast experience as the founder and previous Director of the National Death Index (NDI) for more than 30 years proved invaluable in this project, and resulted in the most comprehensive and accurate documentation of NDI processes and procedures to date.