If a patient has paid his deductible under Medicare Part B, what percentage of coinsurance is the patient liable for during an office visit?

In Medicare Part B, after a patient has met their deductible, they are responsible for a percentage of the covered services, known as coinsurance. The standard coinsurance amount for Medicare Part B is 20%. This means that once the deductible is satisfied, the patient would pay 20% of the Medicare-approved amount for the office visit, while Medicare would cover the remaining 80%.

This structure helps ensure that patients share some of the costs associated with their healthcare, while also providing substantial coverage through Medicare. The percentages stated in the other options do not correctly reflect the coinsurance responsibilities under Part B; specifically, 80% is the amount covered by Medicare, and the other amounts (100% and 15%) do not align with the established coinsurance structure of Medicare. Thus, the correct response regarding the patient's liability for coinsurance after the deductible is indeed 20%.