Final answer:
After the annual $135 deductible, Medicare Part B covers 80% of the allowable costs for Medicare-approved services, while beneficiaries are responsible for the remaining 20% coinsurance.
Step-by-step explanation:
The second cost sharing requirement in Medicare Part B is an annual deductible of $135.00, after which Medicare pays 80% of the allowable costs for Medicare-approved services. These services include physician services, medical tests, outpatient visits, and various other medical services and supplies that are not covered under Medicare Part A.
After meeting the annual deductible, beneficiaries typically are responsible for a 20% coinsurance payment for Medicare-covered services.