HHS provides a CMS resource on historic, current, and projected data on Medicare and Medicaid – enrollment, spending, use. It also has data on budget, administrative and operating costs, providers and suppliers.
A statistical supplement offers a wealth of Medicare and Medicaid spending data. HHS says it includes “charts and tables showing health expenditures for the entire U.S. population, characteristics of the covered populations, use of services, and expenditures under these programs.”