Medicare Part D

Part D or Advantage Drug Coverage: Which Path Fits You?

Part D or Advantage Drug Coverage: Which Path Fits You? — plain-language Medicare information for Olympia, Washington.

OLYMPIA, Wash. — If you take even one prescription, one of the bigger choices in Medicare is how you get your drug coverage. You can pair Original Medicare with a stand-alone Part D plan, or you can pick a Medicare Advantage plan that already has drug coverage built in. Both paths get you to the same place — help paying for medications — but they work differently, and switching between them changes more than just your pharmacy card.

Here is what Olympia readers should know before they decide.

The two structures, in plain English

Stand-alone Part D with Original Medicare. You keep Original Medicare (Parts A and B) for hospital and doctor visits, and you add a separate Part D plan that covers prescriptions. Many people in this setup also buy a Medigap (Medicare Supplement) policy to help with the out-of-pocket costs Original Medicare leaves behind. That means you may be juggling three cards: red-white-and-blue Medicare, Medigap, and Part D.

Medicare Advantage with drug coverage (often called MA-PD). A private plan approved by Medicare replaces the way you get your Part A and Part B benefits, and it usually folds drug coverage into the same plan. You typically use one card, one network, and one set of rules. Medigap does not work with Medicare Advantage.

Both paths follow the same federal drug rules on things like the Part D out-of-pocket cap ($2,100 in 2026, $2,400 in 2027) and the maximum deductible ($615 in 2026, $700 in 2027). What differs is everything wrapped around the drug benefit.

What actually changes if you switch paths

Moving from stand-alone Part D over to Medicare Advantage — or the other way around — is not just a paperwork swap. A few things shift at the same time:

• Your provider access. Original Medicare lets you see almost any doctor in the country who takes Medicare. Most Medicare Advantage plans use networks (HMO or PPO), so your doctors and hospitals in the Olympia area may or may not be in-plan.
• Your pharmacy list. Every drug plan, whether stand-alone or built into Advantage, has its own formulary (the list of covered drugs) and its own preferred pharmacies. A medication that is cheap on one plan can cost more on another.
• Your Medigap situation. If you leave Original Medicare for Medicare Advantage, you generally drop Medigap. Coming back later can be harder — in most cases you no longer have guaranteed-issue rights to buy a Medigap policy, and insurers can consider your health.
• Extra benefits. Many Medicare Advantage plans include things Original Medicare does not, like routine dental, vision, or hearing. Those benefits go away if you move to Original Medicare plus stand-alone Part D.

When you can make the switch

Two windows matter most:

• Annual Enrollment Period (Oct. 15 – Dec. 7). Anyone with Medicare can change drug coverage or move between Original Medicare and Medicare Advantage. Changes take effect Jan. 1.
• Medicare Advantage Open Enrollment (Jan. 1 – March 31). If you are already in a Medicare Advantage plan, you can switch to a different Advantage plan or drop back to Original Medicare with a stand-alone Part D plan.

Certain life events — moving, losing other coverage, qualifying for Extra Help — can open a Special Enrollment Period outside these windows.

A few things to weigh before you decide

• Your prescriptions. Make a list of every drug, the dose, and how often you take it. That list is the single most useful tool for comparing any drug plan.
• Your doctors. If keeping specific Olympia-area providers matters, check whether they take Original Medicare or are in a given Advantage plan's network.
• Your travel patterns. Original Medicare travels with you nationwide; Advantage networks are usually built around where you live.
• Your income. Higher-income beneficiaries pay an IRMAA surcharge on Part B and Part D premiums, starting above $109,000 for a single filer in 2026. That applies whether your drug coverage is stand-alone or inside an Advantage plan.
• Cash flow. The Medicare Prescription Payment Plan lets you spread drug costs across the calendar year instead of paying a big amount at the pharmacy counter. It is available with both stand-alone Part D and Advantage drug coverage.

Where Olympia fits in

Plan availability is set at the county level. Olympia is in Thurston County, where both stand-alone Part D plans and Medicare Advantage plans with drug coverage are offered. The exact plans, carriers, and formularies change every year, which is one reason CMS encourages beneficiaries to re-check coverage each fall — even if nothing about their health has changed.

For a personalized comparison, Washington's State Health Insurance Benefits Advisors (SHIBA) is the official SHIP program for this state. Their counselors are trained, unbiased, and free.