Also realize that most ppl get Parts A and B all wrong.
Part A is NOT all hospital. Part A is inpatient hospital, inpatient psych, inpatient rehab, skilled nursing facilities, and hospice. If you aren't officially admitted, they don't pay. And if you are admitted, Part A only pays the facility, not the doctors--that's Part B.
Part B is NOT just providers. Part B is all hospital that is outpatient or observation, even if you get tests, surgery, meds, etc. in a hospital. If you aren't officially admitted, even after days, it's Part B that pays and you pay 20 percent and there is no limit. And if you are admitted, Part A pays the hospital, but Part B pays all the doctors!
Part B is also DME and prosthetic supplies, as well as some drugs, and any drugs that go with DME, like insulin if you have an insulin pump.