How to Enroll in Medicare Part D Prescription Drug Coverage

When you first join Medicare, choosing your prescription drug coverage is an important step for your health and financial security. For 2026, significant changes to the Part D benefit—including a new $2,100 annual out-of-pocket cap—provide more predictable costs for enrollees.

To enroll in Medicare Part D for 2026, start by gathering your current prescriptions and using the or speaking with one of SelectQuote’s licensed agents to compare options. You must enroll during your Initial Enrollment Period or the Annual Enrollment Period (October 15 to December 7). 

When you choose a plan, you can also elect to participate in the Medicare Prescription Payment Plan. This voluntary program allows you to pay your out-of-pocket drug costs in monthly installments throughout the year. While this program does not lower your total costs, it can help make your monthly pharmacy expenses more manageable.

Understanding Medicare Part D Enrollment Periods 2026

Timing is everything with Medicare. Because Part D is technically an elective form of coverage, you aren't automatically enrolled. To avoid gaps in coverage or lifelong penalties, you’ll want to mark these specific windows on your calendar.

Your Initial Enrollment Period (IEP)

This is your first—and usually best—chance to sign up. Your IEP is a seven-month window that starts three months before your 65th birthday, includes your birthday month, and ends three months after. Enrolling now ensures you have coverage from day one and helps you avoid late-enrollment penalties.

The Annual Enrollment Period (AEP)

Already have a plan? From October 15 to December 7, as part of the Annual Enrollment Period, you can switch to a different Part D plan for the coming year. Since plan costs and drug lists (formularies) can change each year, we recommend reviewing your coverage during this time to ensure you’re still getting the best rate for your specific medications.

Medicare Part D Special Enrollment Period 2026

Life happens, and sometimes you need to change your coverage outside of the standard windows. You might qualify for a Special Enrollment Period (SEP) if you:

• Move to a new address outside your plan's service area.

• Lose "creditable" drug coverage (like from a former employer).

• Move into or out of a nursing home or skilled nursing facility.

Key Changes to Look for During 2026 Enrollment

The 2026 plan year brings some of the most significant changes to Medicare in decades, all designed to make your medications more affordable.

The $2,100 Out-of-Pocket Cap at a Glance

For the first time ever, there is a hard limit on what you’ll pay for your prescriptions. In 2026, every Part D plan has a $2,100 out-of-pocket cap. Once you hit this limit, you pay $0 for your covered drugs for the rest of the year. To see how this affects your specific budget, check out our detailed cost comparison guide.

Standardizing Your 2026 Deductible

While some plans offer a $0 deductible, the standard maximum deductible for 2026 is $615. This is a helpful benchmark to keep in mind when you’re comparing plans—if a plan’s deductible is much lower than this, it might save you more upfront.

Simple Steps to Enrolling in a 2026 Plan

Finding the right plan doesn't have to be complicated. Our proprietary technology helps our licensed agents quickly scan the market for you, but you can also navigate through the following steps on your own.

Gather Your Medication List and Preferred Pharmacy 

Before you start, make a list of your current medications, dosages, and your preferred pharmacy. Plans often have "preferred" pharmacies where your copays will be much lower. Using the lets you enter your exact drugs to see which plan offers the lowest total annual cost.

Choose Between Standalone Part D or Medicare Advantage

You generally have two ways to get drug coverage, and the right choice often depends on how you prefer to receive your overall Medicare benefits:

1. Standalone Part D Plan (PDP): These plans are designed to work alongside Original Medicare (Part A and Part B) or a Medicare Supplement (Medigap) plan. If you like the flexibility of Original Medicare but need help with medication costs, you would enroll in a separate PDP offered by a private insurance company.

2. Medicare Advantage Plan (MA-PD): These "all-in-one" plans are a popular alternative to Original Medicare. Offered by private insurance companies, Medicare Advantage plans are legally required to provide at least the same level of coverage as Original Medicare (Part A and Part B). Most plans also include prescription drug coverage (Part D) and extra benefits not covered by the government-run program, such as routine dental, vision, and hearing services. While these plans must follow Medicare’s rules, the private insurers set their own premiums and out-of-pocket costs, which can vary by provider and location. Many beneficiaries find it convenient to have these expanded benefits bundled into a single member ID card.

Because you can generally only have one form of Medicare drug coverage at a time, it’s important to check if a Medicare Advantage plan already includes prescriptions before you try to buy a separate Part D plan. If you enroll in a standalone PDP while you’re in a Medicare Advantage plan that already has drug coverage, you could be automatically disenrolled from your Medicare Advantage plan and moved back to Original Medicare.

During Enrollment: The Medicare Prescription Payment Plan Opt-In

During the enrollment process, you’ll see an option for the Medicare Prescription Payment plan. This is a new, voluntary program that lets you pay your out-of-pocket drug costs in monthly installments rather than paying them all at once at the pharmacy counter. Keep in mind: You must actively opt-in to participate; it is not automatic.

Avoiding the Part D Late Enrollment Penalty

If you go 63 days or more without creditable drug coverage after your Initial Enrollment Period ends, Medicare may add a penalty to your monthly premium. Creditable coverage is insurance (like from a current employer or the VA) that is expected to pay at least as much as Medicare's standard drug coverage.

It is important to understand that this isn't a one-time "late fee" as you might see on a utility bill. It is a permanent monthly surcharge that stays with you for as long as you have Medicare prescription drug coverage, even if you switch plans later.

How the Late Enrollment Penalty is Calculated

Medicare calculates the penalty based on how long you went without coverage. They use a specific base number that changes each year. For 2026, the national base beneficiary premium is $38.99. Medicare takes 1% of that amount for every full month you were eligible but didn't have a plan. Because that base premium usually goes up a little each year, your penalty amount will likely increase slightly every January as well.

Part D Late Enrollment Penalty Calculator

You can estimate your potential monthly penalty by using this formula:

(Total months without coverage) × (1% of $38.99) = Your Monthly Penalty

To make this easier to visualize, here are two common scenarios:

Note: Medicare rounds the final calculation to the nearest $0.10.

Hypothetical Scenario: Imagine George retired, and his employer coverage ended in December 2023. He decided he didn't need a drug plan because he wasn't taking any medications. Two years later, during the 2025 Annual Enrollment Period, he decided to enroll in a plan starting January 1, 2026. As a result:

• George went 24 months without coverage.

• His penalty is 24% of $38.99 ($9.357).

• George will pay an extra $9.40 every single month in 2026, added directly to his chosen plan's premium.

If you believe you've been assessed a penalty in error—for example, if you actually had creditable coverage through a former employer—you have the right to . You’ll generally need to provide proof of your prior coverage to your plan provider within 60 days of receiving your penalty notice.

Need help navigating the Medicare enrollment process?

Whether you’re enrolling for the first time or looking to update your 2026 coverage, we’re here to advocate for you. At SelectQuote, our licensed insurance agents are focused solely on finding the plan that fits your needs and budget. We’ll use our experience and proprietary technology to help you quickly compare rates and benefits, so you can make your decisions with confidence.