Medicaid Enrollee Supplemental File (MESF): National Death Index (NDI) Segment

The National Death Index segment of the MESF includes cause of death information from death certificates provided through linkage with the National Death Index (NDI) cause of death information.

What does this file include? (variable highlights)

  • NDI date of death
  • ICD-10 description and code for cause of death
  • Underlying conditions for cause of death
  • CDC category code for cause of death

Special considerations

  • Some states are not included in the later years. See specific availability below.
  • This is a segment of the MESF file. Another segment, the Conditions Segment can also be requested.
  • Only beneficiaries with a date of death in the annual Medicaid enrollment file are included in the file. The date can be the Medicaid date of death reported in MAX/TAF or the Medicare date of death for the dually eligible.
  • A bridge file will be provided to assist researchers who are conducting longitudinal analysis involving the 2020 MESF NDI file and the 2020 or 2021 TAF research files. For additional information, see the CCW T-MSIS Analytic Files (TAF) User Guide, section 5A, footnote 29, posted on CCW’s User Documentation page.

Availability of this file



The MESF NDI file is not available for all states in all years. In some cases, states did not have data available at the time the death date cohort was pulled.

  • 2011-2013 CA and UT reported no death dates and are excluded for these years.
  • 2011 – 48 states, includes all states except CA, CO, UT
  • 2012 – 45 states, includes all states except CA,CO, ID, KS, RI
  • 2013 - 26 states including AR, AZ, CT, GA, HI, IA, ID, IN, LA, MA, MI, MN, MO, MS, NJ, NY, OH, OK, OR, PA, SD, TN, VT, WA, WV

Researchers interested in the NDI cause of death information for the dually eligible can request the MBSF NDI file.

This file is only available in the VRDC.

See what is in this file