Do star ratings actually win members?
The whole idea behind rating private Medicare plans is that a higher score should steer people toward the better ones. The ratings are public, and so is the count of how many people sign up for each plan, but the two live far apart, so almost nobody checks whether the idea holds. Put them side by side and you can watch people vote with their choices: where higher-rated plans pull members in, and where a strong rating does nothing for growth.
Ratings and members live apart.
A plan's rating is meant to be both a signpost for the shopper and a reward for the insurer, more stars, more money, more members. But the ratings are kept in one place and the count of who actually signed up is published separately, month by month. To ask whether the rating drives sign-ups, someone first has to match each plan across both sides and line them up over time, and that effort is exactly what leaves the question unanswered.
Once the rating and the sign-ups sit together, the relationship comes into view. You can hold a plan's rating next to how many members it has and how fast it's growing, keep the market steady and let the rating change, and see whether stars really predict where people go, or whether price, brand, and the people selling the plans are drowning out the signal.
Questions you can finally ask.
Each is a question you simply ask and get an answer to, not a three-week analysis project.
Do higher-rated plans grow faster?
Compare how fast plans add members across rating levels to see whether quality and momentum actually move together.
Where do members stay in low-rated plans?
Surface the plans holding lots of members despite weak ratings, the cases where the stars clearly aren't steering people's choices.
Which markets reward ratings the most?
Rank places by how closely sign-ups track the rating, showing where the signpost works and where it's ignored.
How did a rating change move sign-ups?
Follow plans that gained or lost a star and measure how member counts responded in the months that followed.
Which insurers turn ratings into members?
Roll plans up to the parent company to see which insurers turn high ratings into growth and which let good plans go unsold.
Does the drug rating or the overall rating matter more?
Separate the prescription side from the overall plan rating to test which one people actually respond to.
What the answer pulls together.
Each plan's rating
The overall score for every plan, plus the underlying marks for care, customer experience, and service that build it.
How many people signed up
The month-by-month count of members in each plan, the plain record of where people actually landed.
Which company owns each plan
The link that ties a plan's rating to its members and rolls individual plans up to the insurer behind them.
Enormous effort goes into rating these plans on the belief that members will follow the stars. Whether they actually do is a simple question, and it stayed open only because the rating and the sign-ups never sat in one place.
What people ask about this.
Doesn't it take time for ratings to show up in sign-ups?
It does, and that delay is exactly what lining them up over time captures. Because both sides stay matched across many months, you can compare a plan's rating in one stretch against how its membership moved in the months after, instead of reading a single frozen moment. The point is the trajectory, not one snapshot.
Can you tell new members from people who stayed?
The counts show the net change in members over time, so you can read growth and decline directly, and compare plans in the same market to account for the broader trend. Splitting brand-new members from switchers needs finer detail, but the net movement against the rating is exactly what answers whether stars draw people in.
How current is the answer?
It stays current on its own. When new information is published, it's already in there, so you're asking against today's picture, not a year-old extract.
Want to see
if stars sell?
Whether you're an insurer measuring your own plans or sizing up a market, I can get you the exact ratings-versus-sign-ups answer you care about.