Fortunately the government isn't expanding that; it's just mandating that insurance companies give health insurance to more people, and that employers do the same. They're not providing a public option.
No it's not. It's the most horrible thing I've ever experienced.
You have Part A, B, D, with an option for C. Then for D you need to go to a 3rd part to actually get the coverage, and for A and B you can pay for Gap coverage, from yet another 3rd party.
Or switch to C and cancel all the rest. Except of course for when you don't cancel them and instead combine it with some of them.
Then there is PACE which replaces part D, except when it doesn't and you need both of them. And depending on your income you might actually need PACENET with a different set of rules.
Medicare is an incomprehensible MESS. There are people who's entire job is simply to understand Medicare and help people with it.
And I'm sure I've missed a whole slew of other programs.
In contrast private insurance: Pay your premium to one company. Done.