Which organization is responsible for determining the type amount and scope of services covered by Medicaid?

The Centers for Medicare & Medicaid Services (CMS) is the federal agency responsible for overseeing and determining the type, amount, and scope of services covered by Medicaid. However, each state administers its own Medicaid program within federal guidelines, allowing for variations in coverage and services. States have the flexibility to design their Medicaid programs, which can lead to differences in benefits and eligibility criteria across the country.