A client called me last year holding two Medicare Advantage brochures side by side, one with a big gold "5 Stars" badge and one with a plain "3.5 Stars." She wanted to know why anyone would pick the second one. Fair question, and the honest answer took longer than she expected, because the star rating measures a lot of things that have nothing to do with whether her cardiologist takes the plan or whether her specific drugs are covered well.
Star ratings are a genuinely useful tool, produced by a federal agency with no incentive to favor one carrier over another, and they're worth understanding. They're just not the whole story, and treating them as the only variable that matters leads people to the wrong plan more often than you'd think.
§ 01Who scores the plans, and how
Every fall, the Centers for Medicare and Medicaid Services (CMS) publishes a star rating from 1 to 5 for nearly every Medicare Advantage and Part D plan sold in the country. The ratings, explained in detail at Medicare.gov's Plan Finder, roll up more than thirty individual measures into a single overall score. Broad categories include:
- Staying healthy: screenings, tests, and vaccines the plan's members actually receive, like flu shots and cancer screenings.
- Managing chronic conditions: how well the plan supports members with diabetes, kidney disease, or other ongoing conditions.
- Member experience: satisfaction survey results, including how members rate their doctors and the plan itself.
- Member complaints and plan performance: how often people file complaints and how quickly the plan resolves them.
- Customer service: call center responsiveness, appeals handling, and similar operational measures.
Each measure gets its own score, and CMS weights and combines them into the single number you see advertised. It's a genuinely rigorous process, and unlike a lot of what gets marketed to Medicare beneficiaries, nobody's paying to inflate it.
§ 02Why the rating matters financially, not just for peace of mind
Here's the part most people don't know: star ratings aren't just a consumer signal, they change how much money the plan receives from the federal government. Plans that score 4 stars or higher receive bonus payments from CMS, which many carriers reinvest into richer benefits: lower copays, better dental and vision allowances, or a lower premium. A high-rated plan often isn't just better reviewed, it's frequently a better-funded plan with more to offer.
A 5-star rating isn't a marketing sticker. It unlocks real federal bonus dollars that often show up as better benefits in your pocket, not just a nicer badge on the brochure.
§ 03The 5-star Special Enrollment Period
This is the detail almost nobody outside the industry knows, and it's genuinely useful. If a 5-star plan is available in your county, you get a Special Enrollment Period that lets you switch into that plan once per year, at any time, outside the normal Annual Enrollment window. In Florida, a handful of counties have had 5-star options in recent years, and Broward County residents should check availability every year rather than assuming it's the same as last year, because 5-star status can appear or disappear from one plan year to the next.
This SEP is one-directional. It lets you move into a 5-star plan; it doesn't let you leave one using the same rule. If you're already happy where you are, this isn't a reason to switch, but if a 5-star option opens up mid-year and your current plan is struggling, it's worth a look outside the usual AEP window I covered in preparing for Medicare AEP in Broward County.
§ 04Where the rating can mislead you
Here's the honest caveat, and it's the reason I don't let clients choose a plan on stars alone.
It's an average, not a personal score
A 4.5-star plan might excel at chronic disease management and diabetes care while performing only adequately on customer service call times. If quick phone support matters more to you than the disease-management measures, the "better" plan on paper might frustrate you daily.
It says nothing about your specific network or formulary
Star ratings don't measure whether your cardiologist is in network or whether your specific medication sits on a favorable tier. A 5-star plan that doesn't cover your prescriptions is still the wrong plan for you, full stop. This is exactly the kind of gap I walk through when reviewing formularies, which matters even more given the current Part D out-of-pocket cap I detailed in what happens after you hit the $2,100 drug cap.
Small plans can swing wildly year to year
A plan with a smaller Broward County membership can see its rating jump or drop based on a relatively small number of survey responses or complaints. A big statewide plan's rating tends to be steadier because the sample size smooths out the noise. Don't assume last year's 5 stars guarantees this year's 5 stars, and don't panic if a small plan dips a half star, either. Check the trend, not just the snapshot.
A useful habit
Check the rating every fall, not just once.
CMS updates star ratings annually, typically each October ahead of Annual Enrollment. A plan that scored well when you joined three years ago may have drifted. Building the star rating check into your yearly Medicare review, alongside your formulary and network check, catches problems before they cost you.
§ 05How to actually use the star rating
- Start with your doctors and drugs, not the stars. Narrow the field to plans that actually cover what you need first. Only compare stars among plans that already pass that test.
- Look at the category breakdown, not just the overall number. If member experience and complaints matter most to you, weight those categories more heavily than a broad average would.
- Treat anything below 3 stars as a real flag. Low-performing plans can face consequences from CMS, including limits on marketing or, in persistent cases, contract termination. If you're on a plan sitting there, ask why.
- Remember the rating measures the plan, not your specific doctors. A great plan with a mediocre local network is still a mediocre choice for you specifically.
§ 06Bringing it together
Star ratings are one of the few genuinely independent, non-marketing signals in the entire Medicare shopping process, and I use them with every client. But I use them as a tiebreaker among plans that already fit your doctors, your drugs, and your budget, never as the first filter. The plan search that starts and ends with "find me the 5-star option" occasionally lands on a plan that's excellent on paper and wrong for the person actually holding the card.
If you're heading into your own Medicare review, whether it's your first time on turning 65 or your annual AEP check, send me your plan name, your doctors, and your medication list. I'll pull the current star rating alongside the network and formulary check, so you get the whole picture instead of just the badge on the envelope.
If you want your current plan reviewed against the alternatives, see how I review Medicare plans in Broward County or call 954-806-5830.