TAF Demographic and Eligibility File

The Medicaid and CHIP TAF (T-MSIS Analytic File) Demographic and Eligibility (DE) file contains one record for every individual eligible for and enrolled in Medicaid or CHIP for at least one day during the file calendar year.

What does this file include? (variable highlights)

  • Eligibility dates
  • Managed care enrollment
  • Waiver enrollment
  • Money Follows the Person program enrollment
  • Health Home information, including State Plan Option participants, chronic Home Health condition
  • Long-Term Services and Supports eligiblity
  • Conception-to-Birth Option eligibility
  • Disability information
  • Government Assistance program participation
  • Third Party Liability coverage

Special considerations

  • ResDAC provides resources on Medicaid TAF data quality.
  • A bridge file will be provided to assist researchers that are conducting longitudinal analysis involving 2020 TAF research files along with earlier service years. For additional information, please see the CCW T-MSIS Analytic Files (TAF) User Guide posted on CCW’s User Documentation page.

Availability of this file

CY 2014-2021
2022 Preliminary

 For calendar years 2014 and 2015, the CMS Medicaid research files will be in either the MAX or TAF format depending on when the state transitioned to T-MSIS data submissions. 

Please see the state and year availability table: 

For earlier versions of Medicaid data, please refer to the MAX data file page.

See what is in this file