Do I need Part D if I take very few prescriptions?

Yes, in most cases — and not just because of cost. If you don't enroll in Part D (or other 'creditable' drug coverage) when you're first eligible at 65, you'll pay a late enrollment penalty for the rest of your life if you sign up later. The penalty is 1% of the national base premium ($38.99 in 2026) for each month you went without creditable coverage. Even if you take no prescriptions, enrolling in a low-cost or $0-premium plan (especially with Extra Help) avoids the penalty for when you do need drugs later.

What's creditable prescription drug coverage?

Creditable coverage is drug coverage that's expected to pay, on average, at least as much as standard Medicare Part D would pay. Examples include employer or retiree group plans, VA health benefits, TRICARE for Life, Indian Health Service, and PSHB plans for postal retirees. If you have creditable coverage, you can delay Part D enrollment without penalty. Your plan should send you an annual notice confirming creditable status — save those letters.

Can I switch Part D plans during the year?

Generally no — Part D plan changes are only allowed during the Annual Enrollment Period (Oct 15 – Dec 7) for effective dates of January 1. Exceptions: you have a Special Enrollment Period if you move out of your plan's service area, you lose creditable employer coverage, you become eligible for Extra Help or full Medicaid, or your plan terminates. For dual-eligibles, you can switch monthly. Also, Medicare Advantage members can change MA-PD plans (or return to OM + PDP) during the MA-OEP, Jan 1 – Mar 31.

Why is my Part D plan asking for prior authorization on a drug?

Prior authorization (PA) is the plan requiring your doctor to justify the medical need before the plan will cover a drug. It's most common for expensive drugs, drugs with cheaper alternatives (step therapy), and drugs that can be misused. Your doctor's office files a PA request with the plan; the plan approves or denies within a few business days. If denied, your doctor can appeal. OSHIIP can help with multi-level appeals if needed.

Does the $2,100 out-of-pocket cap apply to drugs my MA plan covers?

Yes. The $2,100 cap is a federal Part D rule that applies to both stand-alone PDPs and the Part D portion of Medicare Advantage plans (MA-PD). If you have an MA-PD plan, your Part D-covered drug costs count toward the $2,100 cap. Drugs covered under Part B (administered in a clinic, like infusions) don't count toward the Part D cap — those have separate Part B cost-sharing rules.

Should I sign up for Part D if my STRS Ohio or SERS plan already covers prescriptions?

No. STRS Ohio (SilverScript), SERS (built into the Aetna Medicare Plan PPO), HPRS (Express Scripts), and similar Ohio pension plans include Part D-equivalent prescription coverage. Enrolling in an additional stand-alone Part D plan will cancel your pension's coverage. The pension plans are typically marked as creditable coverage, so you won't face a late-enrollment penalty if you ever do need to switch to a stand-alone plan in the future.

Part D Drug Plans in Ohio (2026): $2,100 OOP Cap and Plan Comparison

On this page

What Part D covers
The 2026 $2,100 out-of-pocket cap
How Part D phases work in 2026
Stand-alone PDP vs. Medicare Advantage with drug coverage
Ohio's 19 Part D plans for 2026
Pharmacy networks and preferred pharmacies
Extra Help (Low-Income Subsidy)
Medicare Prescription Payment Plan
How to compare Part D plans for your prescriptions
Common questions

What Part D covers

Medicare Part D pays for outpatient prescription drugs — the medications you pick up at a pharmacy and take at home. Each Part D plan has a formulary (a list of covered drugs) and assigns each drug to a tier (1 through 5 or 6, with Tier 1 cheapest). Drugs on the formulary have a copay or coinsurance you pay at the pharmacy; drugs not on the formulary aren't covered, though there are exception processes.

What Part D doesn't cover:

Drugs administered by a doctor in a clinical setting (chemotherapy infusions, injectable biologics given in-office) — those go through Part B, not Part D.
Drugs covered by Medicaid for dual-eligibles — Medicaid handles those.
Over-the-counter medications (with rare exceptions for specific covered OTC drugs).
Drugs you'd get in a hospital stay — those go through Part A.

The 2026 $2,100 out-of-pocket cap

The single most important Part D change in recent years was the introduction of an annual out-of-pocket maximum. Before 2024, Part D had no out-of-pocket cap — once you hit "catastrophic coverage" (after about $8,000 in spending), you still paid 5% coinsurance with no limit. For high-cost specialty drugs, that meant tens of thousands of dollars a year for some beneficiaries.

The Inflation Reduction Act of 2022 changed that:

2024: Eliminated the 5% coinsurance in catastrophic coverage. Effective out-of-pocket cap of about $3,300.
2025: Hard $2,000 annual out-of-pocket cap.
2026: Cap rises slightly to $2,100, indexed annually.

Once you've paid $2,100 in covered out-of-pocket prescription costs in 2026, your Part D plan covers 100% of further covered drugs for the rest of the year. This is the most consequential Medicare reform for high-prescription-cost beneficiaries in a generation.

Who benefits most from the $2,100 cap

If your annual prescription spending is below ~$2,100, the cap doesn't change your bill. If you take expensive specialty drugs — biologics for autoimmune conditions, multiple sclerosis treatments, certain cancer drugs, GLP-1 medications when used for diabetes — the cap can save thousands of dollars a year. The Medicare Prescription Payment Plan, also new for 2025, lets you spread that $2,100 over the year instead of paying it all at once.

How Part D phases work in 2026

Part D has three coverage phases in 2026:

Deductible phase — you pay 100% of drug costs until you've paid the plan's deductible (up to $615 maximum; many plans have lower or $0 deductibles).
Initial coverage phase — you and the plan share costs (typically a copay per prescription) until your total out-of-pocket reaches $2,100.
Catastrophic phase — once you've hit the $2,100 cap, the plan covers 100% of remaining covered drugs for the year.

The old "donut hole" (coverage gap) was eliminated in 2025 when the cap was set hard at $2,000. There's no longer a stretch of the year where you pay more than your initial coverage cost-share. Once you hit the cap, you're done.

Stand-alone PDP vs. Medicare Advantage with drug coverage

Two ways to get Part D in Ohio:

Stand-alone Prescription Drug Plan (PDP): A separate Part D plan you buy alongside Original Medicare (typically with a Medigap policy). You pay the PDP a monthly premium and use it at the pharmacy.
Medicare Advantage with drug coverage (MA-PD): Part D is bundled into your Medicare Advantage plan. One ID card, one plan, one set of rules.

You can't have both — if you're on an MA plan with drug coverage and you enroll in a stand-alone PDP, you'll automatically be disenrolled from the MA plan and returned to Original Medicare. This is the most common mistake Medicare beneficiaries make, often because of confusing marketing during AEP.

Ohio's 19 Part D plans for 2026

Ohio has 19 stand-alone Part D plans available statewide for 2026, from major carriers including:

SilverScript (CVS Health) — multiple plan tiers including Choice, Plus, and SmartRx
Wellcare (Centene) — including Value Script and Classic options
Humana — Walmart Value, Premier, and Basic plans
Cigna Healthcare — Saver and Extra plans
AARP / UnitedHealthcare — Walgreens preferred-pharmacy and broader-network plans
Mutual of Omaha Rx
Express Scripts Medicare (Cigna)
Plus several smaller and regional carriers

Premiums for stand-alone PDPs in Ohio range from roughly $0 (with Extra Help) to $80+/month, depending on the plan's formulary, deductible, and preferred pharmacy structure. The cheapest premium isn't always the cheapest total cost — a $15/month plan with a $615 deductible can cost more annually than a $40/month plan with $0 deductible, depending on which drugs you take.

Pharmacy networks and preferred pharmacies

Most Part D plans have two pharmacy tiers:

Preferred pharmacies — the plan's lowest-cost pharmacies. Copays and coinsurance are typically $5–$15 lower per prescription than at standard network pharmacies.
Standard network pharmacies — still covered, but at higher cost-sharing.

Plans often partner with specific chains. For example: SilverScript with CVS, AARP with Walgreens, Humana with Walmart, Wellcare with various preferred chains. If you're loyal to a particular pharmacy, picking a plan that has it as a preferred pharmacy can save real money over the year.

Mail-order prescriptions (typically 90-day supplies) often get even lower cost-sharing than retail preferred pharmacies, useful for maintenance medications.

Want to find the cheapest Part D plan for your prescriptions?A licensed Ohio Medicare agent can enter your prescription list, dosages, and pharmacy into the Medicare Plan Finder and compare all 19 plans by your actual annual cost — not just premium. Most people save several hundred dollars by reviewing this annually.

Find a Medicare Agent in Ohio

Extra Help (Low-Income Subsidy)

If your income and assets fall below federal thresholds, you may qualify for Extra Help, the federal Low-Income Subsidy that dramatically reduces Part D costs. With Extra Help, your monthly Part D premium can be $0, your deductible is eliminated or reduced, and your prescription copays are capped at a few dollars or less per medication.

You're automatically enrolled in Extra Help if you:

Have full Medicaid (you're dual-eligible).
Have a Medicare Savings Program (QMB, SLMB, QI).
Receive Supplemental Security Income (SSI).

If you don't fit those categories but have limited income and resources, you can apply through Social Security at SSA.gov/extrahelp or by calling 1-800-772-1213. OSHIIP (Ohio Senior Health Insurance Information Program) (1-800-686-1578) can help you complete the application. SSA estimates that hundreds of thousands of eligible Americans haven't applied — meaning many Ohio beneficiaries are leaving real money on the table.

Medicare Prescription Payment Plan

New since 2025: the Medicare Prescription Payment Plan (MPPP), sometimes called "M3P" or "smoothing." This optional program lets you spread your annual Part D out-of-pocket costs over monthly payments throughout the year instead of paying full retail at the pharmacy.

How it works: You opt in with your Part D plan. When you fill a prescription, you pay $0 at the pharmacy. Your plan tracks what you would have paid, and bills you a monthly amount that smooths the cost across the remaining months of the year. The total you pay can't exceed the $2,100 OOP cap.

This is especially valuable if you'd otherwise hit the cap early in the year — for example, if you start a $5,000-a-month specialty drug in January, you'd hit the $2,100 cap in your first prescription. With MPPP, instead of paying $2,100 at the pharmacy in January, you'd pay $0 at the pharmacy and $2,100/12 = $175/month for the rest of the year. Same total, smoother cash flow.

How to compare Part D plans for your prescriptions

The Medicare Plan Finder (medicare.gov/plan-compare) is the authoritative tool. The process:

Enter your ZIP code.
Add your prescriptions (drug name, dosage, quantity, how often).
Add your preferred pharmacies.
Review plan results sorted by estimated annual total cost (premium + deductible + copays/coinsurance).

The cheapest plan by total cost is often not the cheapest by premium. The Plan Finder shows you the difference — sometimes a $30/month plan saves $400/year over a $5/month plan because it covers your drugs at lower tiers.

Licensed Medicare agents can run the Plan Finder analysis with you. They can also flag formulary exceptions, prior authorization requirements, and step therapy rules that the simple cost comparison doesn't show.