Which statement about Medicare funding is accurate?

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Medicare funding is a federal program financed by the federal government, not by private employers or state governments. The Hospital Insurance portion (Part A) is funded primarily through payroll taxes collected under the Social Security system, with the trust funds supporting most of this line. Parts B and beyond are funded through a combination of beneficiary premiums and general revenue, meaning the government provides the framework and collects these funds to pay for physician services, hospital care, and other covered benefits. Because Medicare is established and administered at the federal level, its funding comes from federal sources, even though beneficiaries may pay ongoing premiums. This is why physician services are actually covered under Part B, funded through a mix of general revenue and premiums, rather than being excluded from coverage entirely.