This is a fixed, present amount you must pay for healthcare and prescription drugs before Medicare Parts A and B, your prescription drug plan, or other insurance begins to pay. Normally, deductibles are applicable with Medicare Parts A, B, and D, though they may apply to some Part C and Medigap plans. Deductibles vary between Medicare Prescription Drug Plans. The Part B deductible is $183 per year in 2018. After your deductible is met, you typically pay 20 percent of the Medicare-approved amount for most doctor services, outpatient therapy, and durable medical equipment. To find more details, visit Medicare.gov.