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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.
Welcome to Social Security Death Index. This warning banner provides privacy and security notices consistent with applicable federal laws, directives, and other federal guidance for accessing this Government system, which includes all devices/storage media attached to this system.
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.
Follow these steps to submit an application to the National Death Index (NDI). Only eligible projects can apply to use NDI data.
The Early Release Program provides preliminary National Death Index (NDI) data files to help avoid data processing delays. Researchers who use the Early Release Program can access a free, one-time search of the NDI final data file once it is released.
National-level mortality data help track the characteristics of those who have died, monitor and make decisions about public health challenges, determine life expectancy, and compare death trends with other countries.
The National Vital Statistics System (NVSS) provides the most complete data on births and deaths in the United States. Declines in Triplet and Higher-order Multiple Births in the United States, 1998–2023. (10/31/2024)
Review the National Death Index (NDI) resources on this page, the basic NDI eligibility criteria, and the step-by-step NDI application instructions.
Please refer to the CDPH website for further information about Informational Copies. Since November 1, 2013, CDPH – Vital Records no longer embosses certified copies of records.