Medicare Part B covers medical insurance costs for seniors 65 and older. It pays for 80% of outpatient services, including doctor visits, medical equipment, and home healthcare. Read More: It’s part of Original Medicare, but unlike Part A, Medicare Part B is not free — premiums are $185 per month (Learn More: Medicare Advantage vs. Original Medicare). Beneficiaries must also meet a deductible and pay any copays or coinsurance costs associated with their plan.