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What is the NDI?
Learn more about how the NDI matching service operates.

NDI Matching Criteria
View/download PDF 138 KB
The NDI program will permit a match to be listed if any 1 of 7 conditions are satisfied.

NDI Retrieval Report
View/download PDF 78 KB
See a sample of how the NDI lists possible death record matches for a particular study subject.

NDI Application Form
Download Word doc 439 KB
Right click on link, select "Save Target As" or "Save Link As". Then save to your hard drive. To view and complete form, open in Microsoft Word.
This form must be submitted and approved before a researcher is permitted to submit records for an NDI match. Call us on
301-458-4444 before attempting to complete this form.

Revised NDI User Fees (effective October 1, 2004)
View/download PDF 2 MB
Fees are based on the number of records submitted. The fee schedule includes a worksheet for calculating your total NDI charge.

Contact NDI
Please e-mail us if you have questions or would like us to mail you a packet of NDI materials. You can also reach us by calling
(301) 458-4444.

NCHS Mortality Data
Link to mortality statistics.

This page last reviewed November 5, 1999