Medicare Part D – Prescription Drug Coverage

Medicare Part D helps cover the cost of outpatient prescription medications. Plans are offered by private insurance companies and approved by Medicare. You can enroll in a stand-alone drug plan (PDP) with Original Medicare or choose a Medicare Advantage plan that includes drug coverage (MAPD).

How It Works

• Monthly Premium – Paid to the insurance company.
• Annual Deductible – You may pay full cost of prescriptions until the deductible is met.
• Copays or Coinsurance – After the deductible, you share the cost of your medications.
• Coverage Gap – After reaching a certain spending level, you pay a percentage of drug costs.
• Catastrophic Coverage – Once your out-of-pocket costs reach Medicare's limit, your costs drop significantly for the rest of the year.

Drug Tiers & Formularies
Each plan has a formulary (a list of covered medications). Drugs are grouped into tiers, and your cost depends on the tier your medication falls into.

• Tier 1: Preferred generics (lowest cost)
• Tier 2: Generics
• Tier 3: Preferred brand-name drugs
• Tier 4: Non-preferred brand-name drugs
• Tier 5: Specialty drugs (highest cost)

If a medication is not on the formulary, it may not be covered unless an exception is approved. Because each plan's formulary is different, reviewing your specific prescriptions is critical before enrolling.

Why It Matters?
Prescription costs can add up quickly. Part D provides financial protection, access to negotiated drug pricing, and coverage for both generic and brand-name medications. If you don't enroll when first eligible and don't have other creditable coverage, you may face a lifetime late enrollment penalty.

Lighthouse Medicare Solutions Provides Clarity Through The Complexity.