Hunting season is open. But rather than hunting for game, may we recommend setting your sights for the Part D Medicare prescription drug plan that's best for you? If you currently are enrolled in Medicare and are considering changes to your Medicare Part D plan, act now. The "open season" runs until Friday. The Medicare Part D prescription drug program is available to all Medicare beneficiaries to help with the cost of medications. Joining a Medicare prescription drug plan is voluntary, and participants pay an additional monthly premium for the coverage.While all Medicare beneficiaries can participate in the prescription drug …