Unfortunately, Medicare does not typically cover 100% of the costs associated with visiting a doctor. For those enrolled in Medicare Part B, which covers physician visits and outpatient services, there is usually a standard annual deductible that patients must meet before Medicare begins to pay its share. Once the deductible is met, Medicare generally covers 80% of the approved amount for the doctor's services, leaving the patient responsible for the remaining 20%, this is known as coinsurance. It is important to note that Medicare only covers services deemed medically necessary and the doctor must be enrolled in Medicare and accept Medicare assignments. For additional coverage, individuals may opt for supplemental insurance, like a Medigap policy, which can help cover the remaining 20% of coinsurance and other out-of-pocket expenses not covered by traditional Medicare. Patients should also verify whether their doctor accepts Medicare to ensure that their visits are covered and to understand any potential out-of-pocket costs that may incur, ensuring they have a full understanding of their healthcare coverage.