A Medicare drug plan can look affordable until you price the medications you take every month. That is why learning how to compare Medicare drug plans starts with your personal prescription list, not a plan’s monthly premium. The right choice depends on what you take, where you fill prescriptions, and how costs may change during the year.
Start With Your Actual Prescription List
Before looking at any plan, make a current list of every prescription drug you use. Include the drug name, dosage, how often you take it, and whether you use a brand-name or generic medication. Also note whether your doctor expects a medication change in the coming year.
This step matters because each Part D plan has its own formulary, which is the list of drugs it covers. A plan may cover your medication, but place it on a higher cost tier than another plan. In some cases, a plan may not cover it at all or may require the doctor to request approval first.
Bring these details together before comparing options:
- Your prescription names, strengths, and monthly quantities
- Your preferred pharmacy and any mail-order preference
- Whether you are willing to use a different pharmacy to lower costs
- Any medications that are especially expensive or medically necessary
A plan that works well for a neighbor may be a poor fit for you. Even two people taking the same medication can pay different amounts based on dosage, pharmacy choice, and plan rules.
How to Compare Medicare Drug Plans Beyond the Premium
The monthly premium is easy to see, so it often gets too much attention. It is only one part of your total drug cost. A lower-premium plan can cost more over the year if it has a high deductible, places your drugs on costly tiers, or does not include your usual pharmacy in its preferred network.
When comparing plans, estimate what you could spend for the full year. Add the monthly premium, deductible, prescription copays or coinsurance, and any costs you may pay before reaching the plan’s annual out-of-pocket limit. Your projected cost will not be exact, especially if prescriptions change, but it provides a more useful comparison than premium alone.
Check the Drug Formulary and Tier
Plans generally group drugs into tiers. Lower tiers commonly include many preferred generic drugs, while higher tiers may include non-preferred brand-name or specialty medications. Higher tiers usually mean higher copays or coinsurance.
Look for every drug on your list. Then check its tier in each plan and whether the plan has restrictions. Common restrictions include prior authorization, step therapy, and quantity limits. Prior authorization means the plan wants the prescriber to confirm medical need. Step therapy may require trying another covered drug first. Quantity limits restrict the amount covered during a certain period.
These rules do not automatically make a plan wrong for you. But if you rely on a medication with restrictions, make sure you and your doctor can meet those requirements without disrupting treatment.
Compare Pharmacy Networks Carefully
Most Medicare drug plans have pharmacy networks, and your price can change significantly from one pharmacy to another. A pharmacy may be in-network but not preferred, meaning you could pay more there than at another participating pharmacy.
Check the prices at the pharmacy you already use, then compare preferred network pharmacies in your area. If you use mail-order service or regularly travel, confirm that option works for you as well. Convenience has value, particularly when you need medications quickly or have limited transportation. The lowest estimated cost is not always the best fit if it requires a pharmacy you cannot reasonably use.
Review the Deductible and Cost-Sharing Rules
Some plans apply a deductible before they begin paying for certain drugs. Others may waive the deductible for lower-tier generics. Review which drugs are subject to the deductible, not just the deductible amount itself.
Also look at whether a plan charges a fixed copay or coinsurance. A copay is a set dollar amount. Coinsurance is a percentage of the drug’s price, which can be harder to predict for expensive medications. If you take a high-cost brand-name or specialty drug, coinsurance can have a major effect on your budget.
Medicare Part D costs and benefit rules can change from year to year. Review annual plan materials rather than assuming last year’s copays, formulary, or pharmacy network will remain the same.
Know Which Type of Drug Coverage You Have
Medicare prescription drug coverage usually comes through either a standalone Part D plan or a Medicare Advantage plan that includes drug coverage, often called an MA-PD plan. The right comparison begins with knowing which path fits your overall Medicare coverage.
If you have Original Medicare and want prescription coverage, you can generally choose a standalone Medicare Part D plan. If you enroll in a Medicare Advantage plan with drug coverage, you usually receive your medical and prescription coverage through that plan instead.
Do not enroll in a standalone Part D plan without checking how it affects your current coverage. In many cases, joining a separate Part D plan can cause you to lose a Medicare Advantage plan that already includes drug coverage. Employer or retiree coverage can also have its own rules. If you have drug coverage from an employer, union, or another source, confirm whether it is considered creditable coverage before making a change.
Use Plan Ratings as a Tie-Breaker, Not the Starting Point
Medicare plan ratings can offer useful insight into member experience, customer service, and how well plans perform on certain measures. A higher-rated plan can be appealing, but ratings should not replace a review of your drugs and expected costs.
For example, a highly rated plan is not necessarily the better value if it places one of your essential prescriptions on a costly tier. On the other hand, if two plans cover your medications at similar costs, ratings, customer service, and pharmacy access can help you make the final decision.
Watch the Enrollment Deadlines
For most people, the main time to review and change Medicare drug coverage is the Annual Enrollment Period, which runs from October 15 through December 7. Changes made during that period generally take effect January 1.
You may qualify for a Special Enrollment Period if certain life events occur, such as moving outside your plan’s service area, losing other coverage, or qualifying for Extra Help. People enrolled in Medicare Advantage may also have an opportunity early in the year to make certain coverage changes. Eligibility rules vary, so do not assume you can switch plans whenever you want.
If you are first becoming eligible for Medicare, pay close attention to your initial enrollment window. Going without creditable prescription coverage for too long may result in a late enrollment penalty if you enroll in Part D later.
Ask the Questions That Prevent Costly Surprises
A careful comparison should leave you with clear answers. Are all of your medications covered? What will each one cost at your preferred pharmacy? Does the plan require prior authorization or step therapy? Is there a deductible, and does it apply to your medications? Can you afford the plan’s likely costs if a brand-name drug becomes necessary?
If the answers are hard to find or you are comparing several options, an agent can help organize the details. RFM Insurance Solutions can help you review Medicare plan options based on your medications, budget, pharmacy preferences, and coverage situation.
Your prescriptions are personal, and your drug coverage should be too. Set aside time to review your medications before enrollment season, keep your list current, and ask for help before choosing a plan that will affect your care all year.