What Is Medicare Part D Gap Coverage? (And Why the Donut Hole Is Gone)

If you have been on Medicare for a while, you probably know the phrase "donut hole," and you may have felt it. It was the stretch in the middle of the year when your prescriptions suddenly cost much more than they had in January, for no reason you could see at the pharmacy counter.

Here is the short answer to the question: that gap is gone. It was removed from every Part D plan starting January 1, 2025, and it is not coming back. It was eliminated by law, not by any one insurance company, so it applies to every Part D plan and every Medicare Advantage plan that includes drug coverage.

But "it's gone" is not the whole story, because something replaced it, and the replacement is worth understanding. Here is how Part D actually works now.

What the Coverage Gap Used to Be

For anyone who wants the history, or who is still looking at an old letter or brochure that mentions it:

Part D was built in 2006 with four spending phases. You paid your deductible, then you paid copays through what was called initial coverage. Then, once you and your plan together had spent a certain amount, you fell into the coverage gap. In that phase you paid a much larger share of the cost of your drugs, both generic and brand name. You stayed there until your own spending was high enough to reach catastrophic coverage, where your share dropped again.

People called it the donut hole because your coverage had a hole in the middle of it. You had coverage, then less coverage, then coverage again.

The practical problem was that it hit without warning. Someone on several brand-name medications could go along fine for months, then walk into the pharmacy in June and find the price had jumped. That is why so many people skipped doses, split pills, or stopped filling prescriptions partway through the year.

Two clarifications, because both come up often:

The donut hole only ever applied to Part D.

Parts A and B never had a coverage gap. If someone talks about a donut hole in your hospital or doctor coverage, they are mixing things up.

It got smaller for years before it disappeared.

The Affordable Care Act narrowed it gradually over a decade. The Inflation Reduction Act finished it off. So if you remember the gap being less painful in recent years than it once was, that was real.

How Part D Works Now, in Three Phases

1. 1

   The Deductible

   Some plans have a deductible and some do not. When there is one, you pay the full cost of your covered drugs until you meet it. For 2026, no plan can set its deductible higher than $615, and plenty of plans set theirs lower or at zero.

   What you pay here counts toward your annual cap.

2. 2

   Initial Coverage

   Once the deductible is met, you pay your plan's copay or coinsurance for each covered prescription. What you pay depends on the tier your drug sits in on that plan's formulary, which is the plan's list of covered drugs.

   What you pay here also counts toward your annual cap.

   This phase used to end at the coverage gap. Now it runs until you reach the cap.

3. 3

   Catastrophic Coverage

   In 2026, once your out-of-pocket spending on covered drugs reaches $2,100, you move into catastrophic coverage. From that point you pay nothing for your covered drugs for the rest of the calendar year.

   There is no gap in between anymore. You go straight from phase two to phase three.

   Then on January 1, everything resets and you start over at phase one.

What Replaced the Gap: A Hard Annual Cap

The cap is the real headline here, and it is a bigger change than most people realize.

Before 2025, Part D had no upper limit on what you could spend in a year. Someone on expensive medications could spend many thousands of dollars and keep spending. Now there is a ceiling, and it applies no matter how many prescriptions you take or how expensive they are.

The cap was $2,000 when it started in 2025. It is $2,100 for 2026, and it adjusts upward each year as drug costs rise, so expect the number to move.

What Counts Toward the Cap, and What Does Not

This is where people get tripped up, so it is worth being precise.

Counts toward the cap:

• Your plan's deductible
• Copays and coinsurance you pay for covered drugs
• Amounts paid on your behalf by programs like Extra Help

Does not count toward the cap:

• Your monthly plan premium
• Drugs your plan does not cover at all
• Drugs you buy outside your plan, for example paying cash with a discount card
• Manufacturer discounts on brand-name drugs

That fourth one surprises people. Drug manufacturers do contribute a discount on covered brand-name medications, but their share does not push you toward your cap. Only your money does.

The item worth watching closely is the second one. The cap protects you on covered drugs. If one of your medications is not on your plan's formulary, the money you spend on it does not count toward your $2,100 and does not stop counting when you get there. Which is why matching your actual prescription list against a plan's drug list matters more now than the premium does.

Two Other Part D Changes Worth Knowing

You Can Spread Your Costs Across the Year

Hitting a $2,100 cap is protective over twelve months. It is less comforting if most of it lands in January.

The Medicare Prescription Payment Plan exists for that. Instead of paying large amounts at the pharmacy counter early in the year, you can spread your out-of-pocket drug costs into level monthly payments across the calendar year. It does not lower your total. It changes the timing.

It is free to use, but it is opt-in. Nobody enrolls you automatically, so if this would help your budget, you have to ask for it.

Insulin and Vaccines

Covered insulin is capped at $35 for a month's supply, with no deductible applied first. Recommended adult vaccines covered under Part D, such as shingles, cost nothing out of pocket.

Both apply across Part D plans and Medicare Advantage plans with drug coverage.

What This Means for You, Practically

If you take few or inexpensive medications:

You may never get near $2,100, and this change may not affect you at all this year. Your plan's premium, deductible, and copays on your specific drugs are still what matter.

If you take expensive brand-name drugs:

This is the group the change was built for. If you used to dread the middle of the year, that cliff is not there anymore. Your worst case is now a known number.

If you stopped filling a prescription because of cost:

It is worth revisiting with your doctor. The math that made you stop may no longer be the math you are facing.

If your income is limited:

There is help beyond this. Extra Help, also called the Low-Income Subsidy, lowers Part D premiums, deductibles, and copays for people who qualify. If you are on Medicaid or a Medicare Savings Program, you generally qualify for Extra Help automatically. If you are not sure whether you qualify, that is worth checking before comparing plans, because it changes everything downstream.

What Has Not Changed

The coverage gap is gone. Choosing a Part D plan carefully is not less important because of it. In some ways it is more important.

Formularies still differ.

Two plans at a similar premium can cover your medications very differently, or one may not cover one of them at all.

Pharmacy networks still matter.

Many plans have preferred pharmacies where your cost is lower.

Plans change every year.

Your plan can change its drug list, its tiers, its preferred pharmacies, and its premium for the coming year. The plan that fit you last year is not automatically the plan that fits you now.

The late enrollment penalty still exists.

If you go without creditable drug coverage after you are first eligible, a penalty can be added to your premium and can stay there permanently.

That last one is worth a note. Some people look at the new cap and conclude they can skip drug coverage until they need it. That is a costly reading. Part D is insurance against a prescription you do not have yet, and the penalty for waiting follows you.

Bring Us Your Prescription List

The most useful thing you can do with Part D is boring: check your actual medications against what your plan covers for the coming year, before the enrollment window closes.

That is a short conversation if you have your prescription list in hand. Clutch City Insurance is an independent agency in Houston, so we can compare across the carriers we represent rather than steering you to one. There is no cost to sit down with us and no obligation to change anything.

Call 713-870-5044, Monday through Friday, 8:30am to 5pm. Bring your medication names and doses, and your pharmacy.

Our agents speak 17 languages, including Mandarin, Cantonese, Vietnamese, Spanish, Hindi, Urdu, Arabic, Korean, and ASL. If getting to our office on Westheimer is difficult, we can come to you.

For a full list of your options you can also use the plan finder at Medicare.gov, call 1-800-MEDICARE, or get free counseling from your local State Health Insurance Assistance Program (SHIP).