If you choose to enroll in a Medicare Advantage Plan (like an HMO or PPO) or a prescription drug plan (Part D), it is best to call 1-800-MEDICARE to do so. While you can enroll by calling the plan directly, it is best to call Medicare to reduce the risk of administrative error.
Before you enroll in any Medicare Advantage Plan, you need to make sure it covers the doctors, hospitals, and pharmacies you prefer to use and the medications you take, at a cost you can afford. Each plan has its own rules, costs, and restrictions. If you are joining a Medicare Part D plan, make sure it covers your prescriptions and is accepted at your preferred pharmacies.