Planning to Keep Your Medicare Plan for 2027? Review These 5 Prescription Coverage Details

Sticking with the same Medicare plan for another year may seem like the simplest choice, particularly if your prescriptions have stayed affordable and your pharmacy is easy to reach. But a plan that worked well one year can become much more expensive the next, even when your medications stay the same. Medicare prescription drug plans can change the medicines they cover, the pharmacies in their networks, the amount you pay, and the rules attached to coverage from one year to the next.

During Medicare’s annual Open Enrollment Period, it makes sense to review your next-year prescription coverage before new changes take effect on January 1. These five prescription details are worth a closer look before you decide whether to keep your current plan.

1. Your Medication May Have Been Moved to a Costlier Tier

One easy-to-miss change involves where a drug appears on your plan’s formulary. Medicare Part D plans usually place covered drugs into tiers, and each tier can carry different copayments or coinsurance. A medication that once cost $10 at the pharmacy could become more expensive if its tier changes or its cost-sharing terms are revised for the new year.

Every Medicare drug plan has its own formulary and must also meet federal rules on covered medications. Before renewing your plan, compare the formularies for both years for every prescription you take, including medicines you only use from time to time.

2. Your Usual Pharmacy May No Longer Be the Cheapest Option

Many Medicare enrollees assume their regular neighborhood pharmacy will remain the least expensive choice because it has been convenient for years. In reality, Part D plans may have preferred pharmacy networks that offer lower costs than standard network pharmacies, and those arrangements can change annually.

The Medicare Plan Compare tool lets people enter their prescriptions and estimate costs at different pharmacies. For anyone taking several maintenance drugs, even small monthly differences can add up over the course of a year. When checking your coverage, confirm whether your pharmacy is still in-network, whether it has preferred status, and whether mail-order service could lower your costs.

3. New Coverage Rules Could Apply to Your Prescription

Being listed on a plan’s covered drug list does not always mean a medication can be filled without extra steps. Medicare prescription plans may require prior authorization, step therapy, or quantity limits for certain drugs. The Centers for Medicare & Medicaid Services oversees Medicare Part D rules, including formularies and other utilization management policies.

That means a medication you have taken for years could suddenly need more approval or paperwork under your updated plan rules. Review the restrictions tied to each prescription and talk with your prescriber about possible coverage issues before your current supply runs out.

4. The Out-of-Pocket Cap Does Not Make Every Prescription Free

Medicare’s Part D drug benefit includes an annual limit on out-of-pocket spending, but that protection is often misunderstood. For the new year, the standard Part D annual out-of-pocket threshold is $2,400. Once your qualifying out-of-pocket spending reaches that amount, you generally will not owe additional cost-sharing for covered Part D drugs for the rest of the calendar year.

Even so, monthly premiums, drugs excluded from Part D coverage, and some other expenses do not count toward that limit. That means your overall prescription-related spending can still go beyond $2,400. Understanding how the cap works is especially important if you use expensive brand-name drugs or specialty medications.

5. Your Total Yearly Prescription Spending Could Still Rise Even If the Premium Stays the Same

A low monthly premium can make a Medicare prescription plan look appealing, but it does not reflect the full cost. Your real annual spending may include premiums, deductibles, copayments, coinsurance, and costs for prescriptions that are not covered. A plan with a lower premium may still cost more overall if it charges much higher out-of-pocket amounts for your medications.

Medicare encourages people to review coverage every year, and the State Health Insurance Assistance Program, or SHIP, offers free personalized counseling for those who want help comparing options. Instead of focusing on the premium alone, estimate your total yearly expenses using your full medication list and the pharmacies you actually use.

Don’t Let Automatic Renewal Decide for You

Keeping your current Medicare plan may still be the right move, but it should be a deliberate choice rather than an automatic one. Review your Annual Notice of Change, compare formularies, verify pharmacy networks, and look for new prescription restrictions before the enrollment deadline. If your plan is ending or your coverage is changing significantly, pay close attention to the notices that explain your options and deadlines. You can compare Medicare prescription coverage through Medicare.gov, call 1-800-MEDICARE for help, or contact a local SHIP counselor for free guidance.