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      • All new users must go through the NDI application process via the NDI Portal. There is no exception for early release matching services. Upon receiving your letter of approval and the attached transmittal forms, you may submit your study subjects’ records for whatever years of death are then available for NDI searches.
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  2. Latest Announcements. The National Death Index Final File for 2022 is now available for searching. The National Death Index Early Release File for 2023 is now available for searching. See completion percentages by state and territory. The Early Release File is now updated quarterly.

    • About

      NDI Final File: Death records are added to the NDI final...

    • Completion Status

      The National Death Index (NDI) is a central computerized...

    • FAQs

      All the same information as an UNKNOWN search is returned to...

    • Resources for Users

      Our user’s guide is designed to step you through the...

    • NVSS

      The 10 leading causes of death accounted for 72.3% of all...

    • Data Access

      Search Search NCHS. Search ... Mortality (Deaths) Linked...

    • Research Data Center

      The National Center for Health Statistics (NCHS) operates...

  3. Death records are added to the NDI file annually, about 11 months after the end of the calendar year. Historically, before a particular calendar year of deaths can be made available for NDI routine searches, NCHS must receive, process, and edit death records from all vital statistics offices.

  4. Death records are added to the NDI file annually, approximately 12 months after the end of a particular calendar year. The NDI service is available to investigators solely for statistical purposes in medical and health research .

  5. Methodology. The NDI contains a standard set of identifying information on each death to be used in searches of the file to identify and locate death records in state offices. NDI users are encouraged to submit as many of the data items as possible to ensure accurate matches.

  6. Jul 10, 2023 · There were 10 017 additional deaths from NDI results that were not present in the VDW death data. Conclusions NDI data can substantially improve the overall capture of deaths.

  7. National Death Index. National Death Index ( NDI) is a United States resource available to researchers from the US National Center for Health Statistics to obtain death status (regular NDI) or cause of death (NDI Plus) for deaths of citizens occurring within the US. [1]

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