Keep in mind you have the 7 month window for a supplement where you can get coverage NO MATTER HOW SICK YOU MAY BE. It doesn't matter the insurance companies HAVE to cover you. After that window closes, if you are ill, and cannot say no to the 23 questions about your health, then that is IT. You will never qualify for a supplement again.
Unless you are somehow miraculously cured of your chronic illness. Don't blow your window, 3 months prior, the month of turning 65 and 3 months post. Of course if you have credible coverage (like your plan at work or your wifes plan) then you can defer going on Medicare.
Once you go down Advantage road, you chances of turning around are slim. You MUST clear underwriting, AND they will have full access to all of your medical records. There will be no hiding your health status. Choose wisely and choose what is best for you, NOT what was best for your buddy.
If you have a supplement and you can not keep up the payments, you can bail out and go to an Advantage plan. But unless you are in very good health, you can't go the other way. It is a once in a lifetime deal for most people. But if you are poor, and not eligible with the military service to get on tri-care, then Advantage plan may be the route you have to take. But unless you are REALLY poor and can get on Medicaid too, then don't expect that money back for part B premium. MOST people have to pay their part B premium no matter which road they go down.
The lies they tell on the ads on TV are just so you will call. You know why? Because they CANNOT call you about an advantage plan. It is against the law for an agent to call a prospective client out of the blue about an Advantage plan. . AND before they can even talk to you after going to their home to a meeting they have agreed upon (pink card) they will ask you to sign a paper stating that you give them permission to talk to them. Government safeguards to prevent unscrupulous agents from "churning" clients each year.
Ask yourself this: "why would the Advantage plans want me?" After all a lot of the plans, depending on where you live and the risks, are ZERO dollars monthly premiums. How can they do this? Why would they do this? MONEY. That is the entire reason. MONEY. And no other reason.
The government kicks back your part B premium to them so that it can wash its hands of you and have you put into managed care under the kindly insurance companies. They want that monthly guaranteed income from your part B premium. And they are going to Nickle and dime you as you go along for doctors, durable medical equipment and hospital stays.
Medicare (the government and its taxpayers) still has to pay the lions share, but the insurance company deals with Medicare and the providers and sucks the rest out of you. And if you stay healthy, they collect your Part B like clockwork.
Well anyway, this is becoming a "book", and there is more. Always more, and the rules change every year. But I will just say this: If I thought an Advantage plan was an advantage for me, I would have chosen one. I did not. But it can be the only choice some people have. But I REALLY REALLY hate the skating on the edge of truth and lie that the advertisements do.
I highly recommend you get a life and health insurance agent licensed in your state, that you trust and consult with them. Pick carefully.