I'm not a senior, but I've been on Medicare for the last year-ish due to disability. I also have a little experience dealing with it from the other side, I've been a nurse for 25 years.
No vision or dental.
Well, medical type vision things are covered. Like diabetic eye exams, or other medical eye issues. Regular exams and glasses aren't. I think cataracts and surgery are.
Straight Medicare vs a managed care plan......I'm straight Medicare. Working different places, I've seen folks on the managed care plans having to fight to get services authorized, and I didn't want to deal with that. Granted, I guess the managed care plans can save you some money, depending on your health. I just have to see a lot of specialists and have some procedures done, and I didn't want to have to mess with getting approval, etc.
My part B costs about $100 a month. It's deducted from my disability check so I never see it. Works for me.
I do not have a supplement, but am looking into that. Medicare basically covers 80%. If you're pretty healthy, you could probably get by without one. But a few trips to the ED, or a diagnosis that requires a lot of doctor's visits,diagnostic tests, etc, and that 20% starts to add up.
Most doctors take Medicare in this area, but it's my understanding some areas it's really hard to find providers that take it because the reimbursement is so poor. If you're established with a provider, ask them if they take it, and I'd ask what their experience is with your local managed care plans (if any).
If you're not established with a provider now, you might start looking. If you don't have serious ongoing health issues, I'd say look for a Nurse Practitioner or Physician's Assistant. They're mid-level providers that can have their own practice, order labs and diagnostic tests, prescribe meds, and treat most illness/injuries and manage most chronic conditions. They also seem to be more patient centered than a lot of physicians and spend more time getting to know you, and working with you for preventative care with your lifestyle. as opposed to just treating your illness.
Does that help at all?