Medicare Part D

Browse our medicare part d articles

August 7, 2026

How to Request a Part D Formulary or Tiering Exception

If your drug is not on the formulary or sits on an expensive tier, you can ask the plan to make an exception. The clock, the forms, and what the prescriber must provide.

Part D Pharmacy Networks: Preferred, Standard, and Mail Order

The same drug on the same plan can cost different amounts at two pharmacies across the street from each other. How Part D pharmacy tiers and mail order actually work.

Part B vs Part D Drugs: Which Part of Medicare Pays?

Infused drugs bill to Medicare Part B, pharmacy drugs to Part D — and the $2,100 out-of-pocket cap only applies to one of them. How to tell which part pays.

Medicare Drug Price Negotiation: Third Round of Drugs Announced

CMS announced the third cycle of Medicare drug price negotiation, selecting 15 drugs including the first Part B medications. Here is what it means for you.

The Medicare Coverage Gap: How the Part D Donut Hole Works

Learn what the Medicare donut hole was, how the Inflation Reduction Act eliminated the Part D coverage gap, and how the new out-of-pocket cap works in 2026.

Medicare Part D Sign-Up: Enrollment Windows and Key Deadlines

Find out when and how to sign up for Medicare Part D, including enrollment windows and tips for avoiding late penalties.

Medicare Part D Drug List: How Formulary Tiers and Coverage Work

Understand how Part D formularies are structured, how medications are grouped into tiers, and how to verify your drugs are covered.

Medicare Part D Plan Structure: Coverage Phases and How Plans Work

Understand how Part D prescription drug plans are organized, including coverage phases, formularies, and pharmacy networks.

Medicare Part D Pricing: A Full Guide to Premiums, Deductibles, and Copays

A detailed look at Medicare Part D expenses, including monthly premiums, annual deductibles, copays, and coinsurance amounts.

Medicare Part D Explained: How Prescription Drug Coverage Works

Find out how Medicare Part D prescription drug coverage works, what it includes, and why it is important for Medicare beneficiaries.

This content is for educational purposes only and does not constitute a recommendation of any specific Medicare plan. Benefits, costs, and availability vary by plan and location. For complete information about your Medicare options, visit Medicare.gov or call 1-800-MEDICARE (1-800-633-4227), TTY: 1-877-486-2048, available 24 hours a day, 7 days a week.