This content is for general informational purposes and does not constitute medical, legal, or financial advice. Healthcare rules and costs change annually. Last reviewed: January 15, 2025. Always verify current details with your insurer, employer, or a licensed healthcare navigator.
Medicare Part D
Prescription drug coverage available as a standalone plan or bundled with Medicare Advantage.
Full Definition
Medicare Part D provides prescription drug coverage through private insurers. You can get it as a standalone Prescription Drug Plan (PDP) added to Original Medicare, or bundled into a Medicare Advantage plan. Each plan has a formulary (list of covered drugs). Costs vary by plan, drug tier, and income. A late enrollment penalty applies if you don't enroll when first eligible.
Real-World Example
You take a brand-name cholesterol medication. Your Part D plan's formulary places it on Tier 3, so you pay a higher copay. Switching to a generic could move you to Tier 1 with a lower copay.
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Top Providers
Companies that offer this plan type. Click any card to visit their official website.
UnitedHealthcare Medicare
uhc.com
Largest Medicare Advantage provider in the US. Offers Part C, Part D, and Medigap supplemental plans.
Humana Medicare
humana.com
Second-largest Medicare Advantage insurer. Strong Part D formularies and dental/vision add-ons.
Aetna Medicare
aetna.com
Comprehensive Medicare Advantage, Part D, and Medigap supplement plans available nationwide.
Cigna Medicare
cigna.com
Offers Medicare Advantage and Part D prescription drug plans with broad pharmacy networks.
Wellcare
wellcare.com
Focuses on Medicare Advantage and Medicaid managed care plans across many states.
BCBS Medicare
bcbs.com
BCBS companies across the country offer Medicare Advantage, Part D, and Medigap supplement plans.
Plan availability varies by state and employer. Always verify current offerings directly with the provider.
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