We found a firm here in our town that helps you pick the right plans, looking at prescription drugs, etc. and they've guided us well.
They get a sales commission from the plan/program you use, so any cost is very indirect. I'm sure there are firms like this in your area. They don't charge and they're very helpful. Each year they have group sessions, and a lot of users come and you can review all of the plans available in your region, and be guided to the one that works best for you.
We've been very happy with our agent (Blue Bridge Financial).
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My wife and I now use United Health Care's Medicare Advantage plan. It comes in two levels, and we've taken the slight one that costs us about $30 a month (more than the standard Medicare charges). We also have been using the related dental plan (also about $30 a month.) Most years the dental plan hasn't been worth it in terms of pure costs vs expenses covered, but one year it paid about half of a new partial plate ($1500).
Our plan has no co-pay charge for visits to our primary care physician, and about $30 - $40 for specialists (depending on whether they're in plan or not.) We pay about 20% of most diagnostic tests. Prescription drugs have been very reasonable -- most of ours are generic, and generics are $0 if you get them delivered by mail (which is easy when you're on a long-term medication.) One-time prescriptions can run more, and if they're not generic, even more -- but that's true of almost all plans.
Costs to you will be different depending on the state in which you live. The plan we picked has a maximum cost of $4500 -- and that sort of expense is only likely to happen if you have a long hosptial stay or expensive cancer treatment.
UHC also offers a special OTC Essentials (over the counter essentials) for things like some vitamins, bandaids, triple antibiotics, for up to $80 a quarter. (You order what you think you'll need at the first of the quarter.) You can get a LOT of stuff for $80 four times a year.
Look around for a local firm that offers guidance and services, and rely on their expertise