This brief examines national and state-level data on enrollment and spending for Medicare-Medicaid enrollees using the 2019 and 2020 Medicare Beneficiary Summary Files and the 2019 Transformed Medicaid Statistical Information System (T-MSIS). Spending data for Medicare includes beneficiaries in traditional Medicare only, since spending data for beneficiaries enrolled in Medicare Advantage plans are unavailable. State-level data on Medicare-Medicaid enrollment and spending are available through KFF’s State Health Facts.
