2019 Preliminary Medicaid and CHIP Data Now Available

CMS is pleased to announce the availability of Preliminary Medicaid T-MSIS Analytic Files (TAFs) for calendar year 2019. Beginning with 2019 data, CMS plans to release a “Preliminary” version of the TAF RIF for each service year to give TAF users earlier access to Medicaid data in the research file format. The Preliminary RIF data is not fully mature because states are still submitting service use records for that year, so users should be aware of this when planning their analytics. The 2019 Preliminary TAF RIFs were created based on services submitted to CMS through June 30, 2020 and will thus have at least 6 months of runout for each month. 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 research-ready TAFs contain data on Medicaid and Children's Health Insurance Program (CHIP) beneficiary demographics, program enrollment, diagnoses, service use, and payments. They are designed to meet the diverse research needs of the Medicaid and CHIP data user community. The TAFs include 5 annual files, an enrollment file and four claims/billing files. The annual Demographic and Eligibility (DE) file contains demographic, eligibility and enrollment information for all Medicaid and CHIP beneficiaries enrolled for at least one day during each calendar year. The Inpatient (IP) file, Long-Term Care (LT) file, Pharmacy (RX) file, and the Other Services (OT) file contain fee-for-service claims, managed care encounter claims, and per-person-per-month capitated payments for Medicaid and CHIP services.

Data can be obtained for a particular state, group of states, or a national sample. With this release, TAF data are available for the period from 2014 to 2019.  Find more information on the data, including record layouts, on this page that lists all TAF files. To learn how to request TAF data, start here or contact us at resdac@umn.edu or 888-973-7322.