Think of it as Part B/C premium.... you choose which letter you want...
I am not curious.... do they call it Part B premium or is that what 'we' call it...
Not exactly. If you only choose Part B you are exposed for all prescription drug costs (no prescription without insurance ever really just costs $5), and 20% of all lab, emergency, and doctor visits.
Part B is that part of Medicare that pays for physicians, other providers, labs, etc. You are required to pay a premium for Part B. It does not cover prescription drugs.
Part A is free and it comes with Medicare - it is for hospitalization. Drugs are only covered under Part A if dispensed by the hospital (and only at 80% of the hospital billing).
Both pay out at 80% and you are responsible for the other 20%.
You are required to take Part B and pay a premium if you want to expand coverage to include Drugs (Part D), Medicare Advantage (Part C)/Medicare Supplement coverage.
Medicare Supplement picks up the 20% Medicare doesn't pay for, but, there is a premium for buying a Supplement plan and you must be enrolled in Part B. It is also to your advantage to enroll in Part D Prescription drugs, even if you take nothing to avoid a premium surcharge for late enrollment.
Medicare Advantage (Part C) plans may have no or low premiums, co-pays and deductibles, cover drugs, and can include other coverage such as vision, dental, gym memberships, case management, etc. All of these are above and beyond what Medicare covers, but are required by CMS in order for an insurer to offer a Part C plan.
Medicare.gov is a great resource for understanding health care coverage for Medicare eligible people. So is AARP. AARP does have a licensing agreement with other supplement and Part C plans, but the general information about Medicare on their site is excellant.