This Medicare publication shows in detail all the various enrollment periods for both Advantage plans & Part D Rx plans.
This Medicare publication explains the do's & don'ts pertaining to agent activity in the sale of Advantage & Part D plans
This Medicare publication will explain the current issue with hospital admission as an inpatient vs an "observational " stay. The difference being you will be disqualified for the follow up Skilled Nursing Benefit if your overnight stay is billed as "Observational" instead of as an inpatient.
This Medicare publication gives a list of all Preventive services covered by Medicare at 100%, & not subject to the Part B Deductible or any Advantage co-pays or coinsurance.