TAF Inpatient File

The Medicaid and CHIP TAF (T-MSIS Analytic File) Inpatient (IP) file contains records for enrollees who had an inpatient hospital stay. Records include fee-for-service (FFS) claims, managed care encounters and supplemental payments for Medicaid, Medicaid-expansion CHIP and separate CHIP.

What does this file include? (variable highlights)

  • Records included based on discharge date within the file calendar year
  • Active, non-voided, non-denied final action claims
  • Diagnosis codes
  • Present on Admission Indicator
  • Procedure codes
  • Procedure date
  • Discharge status
  • Charges and payments
  • Provider identifier

Special considerations

  • Available encounter data may vary by state, year and eligibility group.
  • CMS continues to work with states to address data quality issues. In addition to preliminary and fully mature files, CMS may provide updated releases of the files for a given year. CMS has fee information for TAF data pricing.
  • 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