Here is an of oldie with general information about Medicare...
From Medicare in 2015 (PDF)
Then there is the actual plan finder on the medicare website..
PLAN FINDER.
Remember that plan A and plan B are the only things administered by the government. There is currently no premium for Plan A and the Plan B
standard premium is $134 for 2018. (Single persons earning over 80K and couples over 180K, pay additional money over the standard premium. The hold harmless clause on Social Security or OASI, has 2017 and earlier S.S. enrollees paying less than the standard $134.)
Everything else is private insurance which generally adds premium costs on top of the part B premium. The lone exception would be some Part C (Medicare Advantage plans) that can be had for the standard part B premium, which could include drug benefits and some other coverages, etc.
A lot depends on your current health and expectations in the coming year, as well as current prescriptions, etc.
As a general rule, whomever you are meeting with, will very likely have a format very similar to the medicare plan finder. As a note of caution, my out of pocket expenses are nowhere near what the plan finder estimates and I am not the picture of health, yet still have an advantage plan.
You can always change each year, so don't feel trapped into one type of insurance.
