Using the online Medicare plan finder program — either yourself or making someone else do it for you — is the best way to find out which Part D plans cover the prescription medications you take.
You must participate in a Part D prescription drug plan within two months of withdrawing creditable drug coverage from another source to escape late penalties.
You can always choose to retain your existing drug coverage instead of enrolling in Part D. However, in order to escape late fees, you must decide if the employer's coverage is "creditable."
No, your Part D package does not have a cap on the amount of prescriptions you can fill. However, no plan covers all medications, and in some cases, policies can restrict the number of drugs that can be filled under a single prescription. In addition, some medications are not covered by Medicare Part D.