When comparing prescription drug plans, it is easy to focus on the monthly premium. But Medicare Part D costs involve much more than that one number. A plan with a low premium could end up costing you more depending on your medications, deductible, pharmacy, and prescription costs.
With Medicare Open Enrollment underway, now is a good time to look at the bigger picture before choosing your coverage for the coming year.
1. Monthly Premium
Your premium is the amount you pay each month for your prescription drug coverage. While a lower premium may sound like the best deal, it does not necessarily mean the plan will cost you less throughout the year.
Consider the premium alongside the other costs associated with the plan.
2. Annual Deductible
The deductible is the amount you may need to pay for covered prescriptions before your plan begins sharing the cost.
For 2026, Medicare Part D plans can have a deductible of up to $615, although some plans may have a lower deductible or no deductible.
When comparing plans, look at how the deductible applies to the medications you regularly take.
3. Copays and Coinsurance
Once your plan’s coverage applies, you may pay a copay or coinsurance for prescriptions. These costs can vary depending on the medication, its drug tier, and the plan you choose.
Your pharmacy matters, too. Some plans may offer lower costs when you use pharmacies within their preferred network.
This makes it important to compare plans using your actual medications and preferred pharmacy rather than focusing only on the premium.
4. Your Total Prescription Costs
Instead of simply asking, “Which plan has the lowest premium?” consider asking:
“Which plan could cost me the least overall based on the prescriptions I actually take?”
For 2026, out-of-pocket spending on covered Medicare Part D drugs is capped at $2,100. Looking at your potential costs for the entire year can give you a much clearer picture of a plan’s overall value.
Take Time to Review Your Medicare Coverage
Prescription needs can change, and Medicare plan costs and coverage can change from year to year. Reviewing your options during Medicare Open Enrollment can help you determine whether your current coverage still fits your needs.
As you compare plans, consider:
- Monthly premium
- Annual deductible
- Prescription copays and coinsurance
- Whether your medications are covered
- Drug tiers
- Pharmacy network
- Estimated total annual costs
The lowest monthly premium isn’t always the lowest-cost option overall. Taking time to compare the full picture can help you make a more informed decision about your Medicare prescription drug coverage.