Planning for 2027: Understanding Medicare Prescription Changes

Medicare Part D's yearly out-of-pocket cap is set to increase to approximately $2,400 in 2027, up from $2,100 in 2026. This adjustment is part of ongoing changes under the Inflation Reduction Act, which continues to reshape drug pricing and premium structures each plan year. Additional shifts, including new negotiated drug prices and updated formulary tiers, make it worth reviewing your current prescriptions and coverage before costs change. Medicare Open Enrollment 2027 runs October 15 through December 7, 2026, and serves as the designated window to switch or adjust your plan. Inside Rx can help you compare potential savings on eligible medications ahead of that deadline.

Start With Your Current Prescription Costs

Your Explanation of Benefits (EOB) from last year is the most reliable starting point for 2027 planning. It documents what you paid out of pocket, what your plan covered, and which coverage stage you reached, concrete numbers that give you an accurate baseline rather than an estimate.

Four components make up your total Part D costs: the premium charged monthly regardless of whether you fill prescriptions, the deductible you pay before coverage applies, and copayments or coinsurance at the pharmacy. The 2027 deductible ceiling is $700, though some plans set it lower or eliminate it entirely.

Your plan's formulary determines how each drug is priced at the counter. Medications placed in lower tiers carry lower cost-sharing; those in higher tiers cost more. For beneficiaries whose prescriptions are mostly generics, plans with reduced or waived generic copayments tend to offer the most value, generic versions of brand-name drugs can reduce costs substantially.

Beneficiaries who qualify for Extra Help receive $0 premiums and deductibles, with per-prescription costs capped at $5.80 for generics and $14.40 for brand-name drugs in 2027. After total out-of-pocket spending reaches $2,400 for the year, cost-sharing drops to $0 for the remainder of that plan year.

Which Medicare 2027 Changes Could Affect Your Budget?

Not all Medicare 2027 updates carry equal financial weight, and several structural changes could affect what you pay month to month.

The second round of Medicare drug price negotiations takes effect January 1, 2027, reducing costs on 15 Part D drugs, including Ozempic, Wegovy, and Trelegy Ellipta. Approximately 5.3 million Part D enrollees use these medications, and the negotiated prices are projected to reduce beneficiary out-of-pocket spending by $685 million. At the same time, drugs such as Stelara, Entresto, Xarelto, and Novolog are scheduled to exit the negotiation program by January 1, 2027.

CMS is also formalizing structural changes to Part D, including the elimination of the coverage gap phase and the Manufacturer Discount Program. On premiums, the picture is uneven. The average Part D premium increases from $35 to $36, a modest shift for most enrollees, but AARP Medicare Rx Preferred members who stay in their current plan could face monthly increases of $50 or more. Enrollees without low-income subsidies will find no $0 premium plans available in 2027.

Formulary changes add another layer of uncertainty. A drug that was covered this year may shift to a higher cost tier, require prior authorization, or lose coverage entirely under a 2027 plan. Checking your plan's drug list before Medicare Open Enrollment 2027 closes is the most direct way to identify these gaps early. Inside Rx can help you compare savings on eligible medications.

Build Your Prescription Coverage Plan for 2027

With a clear picture of current spending and upcoming structural changes, the next step is putting that information to work before Medicare Open Enrollment 2027 closes on December 7, 2026.

Each plan mails an Annual Notice of Change (ANOC) letter by September 30, detailing adjustments to premiums, deductibles, drug tiers, and pharmacy networks for the coming year. This document is the most direct source for understanding whether your current Medicare Part D plan remains cost-effective heading into 2027.

Three steps can guide your review:

1. Ask what's changing, check premiums, drug coverage, and whether your pharmacies remain in network.
2. Compare alternatives using the Medicare Plan Finder to see how other plans cover your specific medications.
3. Choose to stay enrolled or switch before the Medicare Open Enrollment 2027 deadline.

For enrollees whose out-of-pocket drug costs concentrate in certain months, the Medicare Prescription Payment Plan offers one way to manage cash flow. It distributes yearly costs into equal monthly installments at no extra charge and with no interest, though total spending remains the same. Note that switching Part D plans during Open Enrollment requires re-electing into this payment option separately.

Inside Rx can help you compare potential savings on eligible medications at participating pharmacies as you finalize your 2027 coverage.

Conclusion

The 2027 Medicare Part D changes, higher out-of-pocket caps, negotiated drug prices, and shifting premiums, have a direct bearing on what certain medications cost you. Waiting until January to assess the impact leaves little room to course-correct. Your ANOC letter, the Medicare Plan Finder, and the Open Enrollment window through December 7, 2026, are the tools available to make an informed decision. Inside Rx can help you compare potential savings on eligible medications at participating pharmacies.

References

• https://mysourcewise.com/prepare-for-medicare-medi-cal-changes-in-2027/
• https://www.medicare.gov/publications/12229-your-medicare-in-2027-whats-new-and-changing.pdf
• https://www.cms.gov/newsroom/fact-sheets/medicare-part-d-2027-national-average-monthly-bid-amount-information
• https://www.medicareplanning.com/medicare-part-d-2027-bid-amount-changes/
• https://www.medicare.gov/health-drug-plans/part-d/basics/costs
• https://www.medicare.gov/health-drug-plans/part-d/what-drug-plans-cover/how-drug-plans-work
• https://www.medicare.gov/basics/costs/help/drug-costs
• https://www.cms.gov/newsroom/press-releases/hhs-announces-15-additional-drugs-selected-medicare-drug-price-negotiations-continued-effort-lower
• https://www.kff.org/medicare/key-facts-about-medicare-drug-price-negotiation/
• https://www.cms.gov/initiatives/medicare-prescription-drug-affordability/overview/medicare-drug-price-negotiation-program/selected-drugs-negotiated-prices
• https://www.cms.gov/newsroom/fact-sheets/contract-year-2027-medicare-advantage-part-d-final-rule
• https://www.kff.org/medicare/many-medicare-part-d-stand-alone-drug-plan-enrollees-will-see-modest-premium-increases-for-2027-but-others-could-pay-much-more-if-they-dont-switch-plans/
• https://www.uhc.com/medicare/medicare-education/part-d-changes.html
• https://www.ncoa.org/article/what-is-a-medicare-annual-notice-of-change-anoc/
• https://www.medicare.gov/prescription-payment-plan
• https://www.cms.gov/medicare/health-drug-plans/medicare-prescription-payment-plan
• https://medicare.excellusbcbs.com/prescriptions/medications/prescription-payment