KFF January 17, 2025
Medicare provides health insurance coverage to 67 million adults—20% of the U.S population—and is a major source of revenue for physicians and other health providers. In 2024, Medicare spending on Part B services (including physician services, outpatient services, and physician-administered drugs) accounted for nearly half (49%) of total Medicare benefit spending. Physicians are not required to participate in Medicare, though the vast majority of them choose to do so.
In recent years, physician groups and some policymakers have raised concerns that physicians would opt out of Medicare due to reductions in Medicare payments for many Part B services, potentially leading to a shortage of physicians willing to treat people with Medicare. Medicare payments are lower, on average, than payments from...
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