With dozens of Medicare Advantage and Part D plans available in most areas, choosing the right coverage can feel overwhelming. A structured comparison process can simplify the decision considerably. This guide walks you through each step.
Step 1: Understand Your Plan Options
Before you start comparing, make sure you know what types of plans are available:
- Original Medicare (Parts A and B): Fee-for-service coverage administered by the federal government. You can see any provider that accepts Medicare, but you pay deductibles and coinsurance with no annual out-of-pocket cap.
- Medicare Advantage (Part C): Private plans that bundle Part A, Part B, and usually Part D. They often include extras like dental and vision but use provider networks and may require referrals.
- Standalone Part D plans: Prescription drug coverage that you add to Original Medicare.
- Medigap (Medicare Supplement): Supplemental policies that cover cost-sharing gaps in Original Medicare. These are separate from Medicare Advantage.
Your first decision is whether Original Medicare plus a Medigap and Part D plan or a Medicare Advantage plan better suits your situation. From there, you compare specific plans within your chosen category.
Step 2: Use Medicare Plan Finder
Medicare Plan Finder is a free online tool at Medicare.gov that lets you compare plans available in your area. It is the most comprehensive resource for side-by-side plan comparisons and should be your starting point.
Here is how to use it effectively:
- Enter your ZIP code to see all plans available where you live
- Add your prescriptions to the tool so it can estimate your drug costs under each plan
- Enter your pharmacy preferences to see which plans cover your pharmacies
- Check whether your doctors participate in each plan's network
- Compare up to three plans side by side on costs, coverage, and ratings
The tool calculates estimated annual costs based on the information you provide, which makes it much easier to compare plans on an apples-to-apples basis rather than looking at premiums alone.
Step 3: Compare Premiums and Deductibles
Premiums and deductibles are your most visible costs, but they only tell part of the story. A plan with a zero-dollar premium may have higher copays or a larger deductible, while a plan with a modest monthly premium might save you more overall.
When comparing costs, look at:
- Monthly premium: What you pay each month for the plan, in addition to your Part B premium
- Annual deductible: The amount you pay out of pocket before the plan begins covering services
- Drug deductible: Some Part D and MA plans have a separate deductible for prescription drugs
- Maximum out-of-pocket (MOOP): The most you would pay in a year for covered services under a Medicare Advantage plan. Original Medicare has no MOOP.
A low premium with a high MOOP can be cost-effective if you are healthy, but risky during a major health event. A higher premium with a lower MOOP provides more predictable spending.
Step 4: Evaluate Drug Coverage and Formularies
If you take prescription medications, drug costs can be one of the largest components of your annual health spending. Every Part D and Medicare Advantage plan maintains a formulary, which is the list of drugs the plan covers and the tier each drug is assigned to.
To compare drug coverage:
- Check whether each of your medications is on the plan's formulary. If a drug is not listed, the plan will not cover it unless you receive an exception.
- Note the tier placement. Drugs on lower tiers (typically generics) have lower copays. Specialty drugs on higher tiers can cost hundreds of dollars per fill.
- Look for quantity limits, step therapy, or prior authorization requirements. These restrictions can delay or limit your access to certain medications.
- Understand the current Part D cost structure. The coverage gap (donut hole) was eliminated in 2025 under the Inflation Reduction Act. Part D now follows three phases: a deductible (up to $615), an initial coverage phase where you pay 25% coinsurance, and catastrophic coverage where you pay $0 after reaching $2,100 in total out-of-pocket spending for the year.
Running your specific medications through Medicare Plan Finder gives you personalized drug cost estimates for each plan, which is far more useful than looking at formularies in the abstract.
Step 5: Check Provider Networks
If you are considering Medicare Advantage, verifying that your preferred doctors, specialists, and hospitals are in-network is essential. Out-of-network care is either not covered or significantly more expensive under most MA plans.
Steps to verify your providers:
- Visit the plan's website and use its provider directory to search for your doctors by name
- Call your doctor's office directly and ask whether they accept the specific plan you are considering
- Check whether the plan requires referrals from a primary care physician to see specialists
- If you see providers in multiple states or travel frequently, confirm the plan's service area and out-of-area coverage policies
Under Original Medicare, you can see any provider that accepts Medicare assignment, so network restrictions are not a concern. This is one of the primary advantages of staying with Original Medicare.
Step 6: Review Star Ratings
Medicare assigns star ratings to each plan on a scale of one to five stars, with five being the highest. These ratings are based on member satisfaction, quality of care, customer service, and how well the plan manages chronic conditions and prescription drug coverage.
Star ratings can help you:
- Identify plans with a strong track record of quality and service
- Avoid plans with consistently low ratings that may indicate problems with claims processing, appeals, or member experience
- Find plans eligible for bonus benefits, as higher-rated plans sometimes receive additional funding that they pass along to members
While star ratings are a useful screening tool, they should not be your only criterion. A five-star plan with a limited network or poor drug coverage for your specific medications may not be the best fit for you.
Step 7: Estimate Total Costs and Get Help
The most accurate way to compare plans is to estimate your total annual spending under each option by adding up premiums, deductibles, expected copays and coinsurance, and projected prescription drug costs. Medicare Plan Finder provides an estimated annual total based on your inputs, or you can calculate your own using each plan's Summary of Benefits document.
You do not have to navigate this process alone. State Health Insurance Assistance Programs (SHIPs) offer free, unbiased counseling. Licensed insurance brokers can walk you through your options at no cost to you, as they are paid by the plans. And Medicare.gov provides comparison tools, educational resources, and a helpline.
Taking the time to compare plans methodically during each enrollment period can save you hundreds or even thousands of dollars per year and ensure you have the right coverage when you need it most.