Part B is the Medical side.
It covers medically necessary services including doctors services, outpatient care, home health services, durable medical equipment and other medical services. Part B also covers Preventive and screening services.
The cost: for most people it’s $134/month for 2018. But wait, it gets better because they now “means” test Part B premiums! That means if you are a larger earner, individual or couple, you will pay additional premiums. The government looks back at your tax return from two years ago and will charge you higher Part B premiums if you had more income then. In technical terms it is referred to as Income Related Monthly Adjustment Amounts (IRMAA). This page from Medicare gives you all the information related to additional premiums.
Part B late enrollment penalty. If you don’t sign up when you are supposed to, you can be fined. The fines can last a lifetime for Part B! Don’t let it happen to you. Technically, they fine you 10% of the Part B premium for every 12-month period that you could have had Part B, but didn’t enroll. It’s bad.
Click the Image Below to View the 2019 Part B Monthly Premiums by Income: