2021 and 2022 T-MSIS Medicaid and CHIP Data Now Available

CMS is pleased to announce that updated and preliminary Medicaid T-MSIS Analytic Files (TAFs) for service years 2021 and 2022, respectively, are now available. The TAF research files* contain data on Medicaid and Children's Health Insurance Program (CHIP) beneficiary demographics, program enrollment, service use, and payments. They are designed to meet the diverse research needs of the Medicaid and CHIP data user community.

Updated 2021 TAF release:
In December 2022, CMS made "preliminary" TAF enrollment and claims files for service year 2021 available to researchers. This preliminary 2021 RIF data was not fully mature because states were still submitting 2021 service data to CMS. Today's 2021 TAF research file release contains fully mature data, which includes at least 12 months of runout for each service month. Please note, CMS is continuing to work with states to address data quality issues and we anticipate updating the 2021 TAF research files again in 2024.

2022 Preliminary TAF release:
The 2022 preliminary TAFs were created based on services submitted to CMS through July 31, 2023 and will thus have at least 6 months of runout for each month. The preliminary RIF data is not fully mature, so users should be aware of this when planning their analytics. Once the TAF data for that year are fully mature and include at least 12 months of runout for each month, CMS will release an updated version of the RIFs.

*The TAF research files currently include 7 file types:

  • Annual Demographics and¬†Eligibility (DE)
  • Inpatient (IP)
  • Long-Term Care (LT)
  • Pharmacy (RX)
  • Other Services (OT)
  • Annual Managed Care Plan (APL)
  • Annual Provider (APR)

The DE file contains demographic, eligibility and enrollment information for all Medicaid and CHIP beneficiaries enrolled for at least one day during the calendar year. The IP, LT, RX, and OT files contain fee-for-service claims, managed care encounter claims, and per-person-per-month capitated payments, plus newly available non-person service payments, for Medicaid and CHIP services, organized by service month. The APL file contains information about each Medicaid and CHIP managed care plan/entity that CMS authorized to operate in a state during the calendar year. Finally, the APR file contains information about the providers that are eligible to render services to Medicaid and CHIP beneficiaries for any month of the year.

TAF data are available for service years 2014 to 2022. Find more information on the data, including record layouts, on this page. To learn how to request TAF data, start here or contact us at resdac@umn.edu or 888-973-7322.