Medicare Part D provides prescription drug coverage through private insurance plans approved by Medicare. You can get Part D through a standalone Prescription Drug Plan (PDP) paired with Original Medicare, or through a Medicare Advantage plan that includes drug coverage (MAPD).
32 steps across 7 sections
1. Determine If You Need Part D
- Review your current and anticipated prescription medications
- Check if you have other creditable drug coverage (employer plan, VA, TRICARE, etc.)
- Creditable coverage must be "at least as good as" Medicare Part D — your plan must notify you annually
- If you have no creditable coverage, enroll in Part D to avoid late penalties
2. Choose Between Standalone PDP and MAPD
- Standalone PDP Pairs with Original Medicare + Medigap; you choose drug plan separately
- MAPD (Medicare Advantage with drugs) Drug coverage bundled into your Medicare Advantage plan
- If you have a Medigap policy, you need a standalone PDP
- You cannot have both a standalone PDP and an MAPD plan
3. List All Your Medications
- Include drug name, dosage, frequency, and quantity
- Note any specialty medications or brand-name drugs with no generic alternative
- Include over-the-counter drugs your doctor has prescribed
- Check if any medications require prior authorization or step therapy
4. Compare Plans Using Medicare Plan Finder
- Visit medicare.gov/plan-compare
- Enter your ZIP code and all medications
- The tool estimates total annual costs including premiums, deductibles, and copays
- Sort by lowest total estimated annual cost, not just lowest premium
5. Review Plan Formularies
- Each plan has a formulary (list of covered drugs) organized in tiers
- Tier 1 Preferred generics (lowest copay)
- Tier 2 Non-preferred generics
- Tier 3 Preferred brand-name
- Tier 4 Non-preferred brand-name
- Tier 5 Specialty drugs
- Verify all your drugs are on the formulary and check for restrictions
6. Check Pharmacy Network
- Confirm your preferred pharmacy is in the plan's network
- Check for preferred pharmacies offering lower copays
- Consider mail-order pharmacy options for maintenance medications (often cheaper)
- Verify specialty pharmacy access if needed
7. Enroll in Your Selected Plan
- Online Through medicare.gov or the plan's website
- Phone Call the plan directly or 1-800-MEDICARE
- Paper Request and mail enrollment forms
- Agent Through a licensed insurance agent
- Enrollment periods: Initial Enrollment Period, Annual Open Enrollment (Oct 15-Dec 7), Special Enrollment Periods
Common Mistakes
- Not enrolling when first eligible
- Choosing the lowest premium plan
- Not checking the formulary
- Ignoring pharmacy network
- Not reviewing annually
Pro Tips
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