2022 and 2023 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 2022 and 2023, 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.

Carmen Wagener

Carmen Wagener joined ResDAC in November 2024. She has a Bachelor of Science in Microbiology and Immunology from McGill University and a Master of Public Health in Environmental Health and Epidemiology from Emory University. She has previous work experience in tuberculosis transmission dynamics, foodborne disease epidemiology, and cancer clinical research.

DUA Extension and Closure Policy

All DUAs, regardless of how the data is accessed, must be extended annually or closed if you are no longer using the data. DUAs that are not closed or extended within 30 days after the expiration date are in violation of the terms of the DUA and will be forced to close and the data destroyed. An expired DUA is a violation of the agreement and prevents any action on all DUAs for your organization.

TAF Research Considerations: Data Quality, Program Variation, and Disenrollment

Date Recorded

This video is one segment in a series of videos from ResDAC’s Introduction to the Use of the Medicaid and CHIP TAF (T-MSIS Analytic File) Data for Research.

In this presentation, Dr. Shippee discusses common issues that come up when using TAF data for research, including (1) how benefit design influences what is observed in the data (2) data quality and data availability, and (3) disenrollment.

Important Research Data Request & Access Policy Changes

(Updated 09/20/24): In February 2024, CMS announced planned changes to our research data access policy to help protect sensitive beneficiary information from increasing security risks. These changes included transitioning most research studies to the Chronic Conditions Warehouse Virtual Research Data Center (CCW VRDC) and increasing physical data fees to cover growing costs associated with physical data provisioning. CMS released a Request for Information (RFI) to gather feedback from researchers on these changes. 

New Enrollee-level EDGE Data Now Available for Research

CMS is pleased to announce the availability of the Enrollee-Level External Data Gathering Environment (EDGE) Limited Data Set (LDS) for the 2022 benefit year to requesters who seek the data for research purposes. The EDGE LDS contains certain masked enrollment and claims data for on- and off-Exchange enrollees in risk adjustment covered plans in the individual and small group (including merged) markets, in states where HHS operated the risk adjustment program for the 2022 benefit year.

Connor O'Brien

Connor O'Brien joined ResDAC in March 2024. He has a Bachelor of Arts in Psychology and a Bachelor of Science in Business Administration from Winona State University, and a Master of Arts in Psychology from Roosevelt University. Connor was previously a research assistant at DePaul University, where he worked on grant-funded research studying recovery homes called Oxford Houses and was responsible for budgeting the grants.