Medicaid Data (T-MSIS) System

Dataset Summary

The Medicaid Data (T-MSIS) system contains comprehensive claims data on Medicaid and Children’s Health Insurance Program (CHIP) beneficiaries across the United States. The data system was overhauled in 2015–2016 and renamed the Transformed Medicaid Statistical Information System (T-MSIS). These population-based claims data include detailed information on enrollment, utilization, diagnoses, procedures, and costs. Publicly available state-level summary data can be accessed through the Medicaid data portal.