Medicare Part D

Two ways to get Medicare drug coverage in Fishers: what changes if you switch paths

In Fishers, people new to Medicare often hit the same fork in the road: should drug coverage come from a stand-alone Part D plan paired with Original Medicare, or should it ride inside a Medicare Advantage plan? Both paths lead to prescription coverage, but they are built differently — and moving between them changes more than just your pharmacy card.

Medicare Part DFishers, IN

Here is a plain-English look at how the two structures work in 2026, and what actually shifts if you switch.

The two structures, side by side

With Original Medicare plus a stand-alone Part D plan, you have three separate pieces: Part A (hospital), Part B (medical), and a Part D plan you choose from a private insurer for prescriptions. Many people also add a Medigap (Medicare Supplement) policy to help with Part A and Part B cost-sharing. Each piece is bought — and billed — on its own.

With a Medicare Advantage plan that includes drug coverage, one private plan bundles your Part A, Part B and Part D benefits into a single package. You still have Medicare; you are just getting your benefits through that plan instead of directly from the government. Most Advantage plans include drug coverage, though a few do not.

Fishers is in Hamilton County, where both stand-alone Part D plans and Medicare Advantage plans with drug coverage are sold. The number of options each year is set at the county level by the Centers for Medicare & Medicaid Services (CMS).

What is the same on both paths

A few Part D rules apply no matter which door you walk through:

• The $2,100 out-of-pocket cap on covered Part D drugs in 2026.
• A maximum deductible of $615 for 2026 (plans can charge less).
• Three coverage phases — deductible, initial coverage, and catastrophic. The old coverage gap, or "donut hole," was eliminated in 2025.
• Access to the Medicare Prescription Payment Plan, an option to spread your drug costs into monthly payments across the year instead of paying at the pharmacy counter.
• IRMAA (income-related monthly adjustment) surcharges on Part B and Part D premiums for higher earners — starting above $109,000 in income for a single filer in 2026.

The formulary (drug list), pharmacy network and cost-sharing tiers are set by each individual plan, so those details vary — but the program-level structure above is the same on either path.

What actually changes when you move between them

Say you have Original Medicare with a stand-alone Part D plan and you decide to move to a Medicare Advantage plan that includes drugs. Several things shift at once:

• How you get medical care changes. Advantage plans use provider networks (HMO, PPO and others) and may require referrals or prior authorization. Original Medicare lets you see any provider who accepts Medicare.
• Your drug coverage moves inside the plan. You cannot keep a stand-alone Part D plan while enrolled in most Medicare Advantage plans. Signing up for an MA-PD generally ends a stand-alone Part D enrollment automatically.
• Your Medigap policy stops paying. Medigap only works with Original Medicare. If you drop Original Medicare for Advantage, your Medigap policy no longer coordinates with your coverage.

Going the other direction — from a Medicare Advantage plan back to Original Medicare plus a stand-alone Part D plan — has its own wrinkle. You may want a Medigap policy again, but outside of your one-time Medigap Open Enrollment Period (or a specific guaranteed-issue situation), insurers in Indiana can use medical underwriting. That means a Medigap application can be priced higher or denied based on health. It is worth checking with the Indiana SHIP before you switch.

When you can make the change

Two windows matter most:

• Annual Enrollment Period (Oct. 15 – Dec. 7): anyone with Medicare can join, switch or drop a Part D plan or a Medicare Advantage plan. Changes take effect Jan. 1.
• Medicare Advantage Open Enrollment Period (Jan. 1 – March 31): if you are already in a Medicare Advantage plan, you can switch to a different Advantage plan or drop it and return to Original Medicare (and pick up a stand-alone Part D plan). This window is not available to people who start the year on Original Medicare.

There are also Special Enrollment Periods for events like moving, losing other coverage, or a plan leaving your area.

How to think about which path fits

Neither structure is universally better — they answer different questions. A few things to weigh:

• Providers: Do the doctors and hospitals you use take Original Medicare broadly, or are they in a specific Advantage plan's network?
• Prescriptions: Are your medications on the formulary of the plans you are comparing, and at what tier?
• Travel: Do you spend time outside Indiana? Original Medicare travels widely; Advantage networks are usually local.
• Budget predictability: Some people prefer the more predictable cost-sharing of Original Medicare plus Medigap and Part D; others prefer the single-plan structure of Advantage.

The Medicare Plan Finder at medicare.gov lets you enter your Fishers ZIP code and your drug list to compare stand-alone Part D plans and Medicare Advantage plans available in Hamilton County.