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T-MSIS Data Dictionary

The T-MSIS data set contains:

  • Beneficiary eligibility & enrollment data.
  • Utilization & cost data.
  • Payment data.
  • Provider participation, qualifications & affiliations.
  • Service delivery network and managed care plan data about plan level participation.
  • Data on the degree to which third party liabilities (e.g. insurance carrier level data) offset the cost of covered benefits provided to Medicaid and CHIP beneficiaries.

The T-MSIS Data Dictionary provides the requirements for States to correctly map State system data to T-MSIS record layouts in order to accurately send Medicaid and CHIP data to CMS via monthly file submissions. In conjunction with the T-MSIS Coding Blog, the data dictionary provides documentation for effective file submissions.