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You’ve probably noticed the star ratings next to every plan on Medicare’s comparison tools, but it isn’t always clear what they actually measure — or how much weight they deserve in your decision. Here’s what changed for 2026, one dramatic real-world example of how much a rating can shift, and how to actually use the stars when comparing plans.
The Quick Answer
- CMS rates every Medicare Advantage contract from 1 to 5 stars, in half-star increments, based on up to 33 quality measures — updated every October, ahead of the Annual Enrollment Period
- Ratings apply to the contract, not the individual plan brochure — one insurance company can offer multiple plans under a single contract, so it’s worth confirming which specific contract your plan falls under
- 2026 brought a real methodology shift: CMS reduced the weight given to patient experience and complaints (from 4 down to 2), shifting more emphasis toward clinical outcomes — and cut points keep getting harder to hit
- A plan’s rating can change significantly year to year even if the underlying care didn’t change much, because the bar itself moves
How the Rating System Actually Works
Every fall, CMS evaluates Medicare Advantage contracts across dozens of measures, grouped into categories:
- Preventive screenings and vaccines
- How well a plan helps manage chronic conditions
- Member experience and satisfaction
- Member complaints and how quickly problems get resolved
- Customer service responsiveness
For each measure, CMS sets thresholds called cut points that determine whether a contract earns one star or five on that specific measure. Here’s the part most people don’t realize: those cut points are recalculated every single year based on how all contracts performed nationally. That means a plan’s rating can shift even if its actual, real-world performance stayed exactly the same — the bar itself moved.
What Changed for 2026
CMS made some genuinely significant methodology changes for the ratings that apply to 2026 (published October 9, 2025):
- Patient experience and complaints now count for less. The weight given to patient experience, complaints, and access measures was cut from 4 down to 2, shifting more emphasis toward clinical outcome measures instead.
- A new equity measure was introduced. Called EHO4All, it specifically rewards plans that deliver strong results for underserved populations, reinforcing CMS’s long-term push to reduce care gaps.
- The 4-star threshold keeps getting harder to hit. For 2026, 63% of 4-star cut points were harder to achieve than in 2025 (when 70% had gotten harder compared to the year before) — a continuing trend of rising standards.
- A statistical cleanup method (Tukey outlier deletion) continues phasing in, removing extreme outlier performance from how cut points are calculated, which has pushed cut points to the highest levels in the program’s history.
Why This Matters So Much to Insurers (and Indirectly, to You)
The 4-star threshold isn’t just a marketing number — it’s the dividing line for Quality Bonus Payments (QBP), extra money CMS pays to highly rated plans. This creates real financial stakes that explain why insurers fight so hard over their ratings, and it’s worth understanding because it directly affects what benefits a plan can afford to offer you.
A real example worth knowing: in 2024, 94% of Humana’s Medicare Advantage members were enrolled in plans rated 4 stars or higher. By 2026, that figure had fallen to just 20%. Humana sued CMS over the ratings methodology twice — and lost both times. This wasn’t a case of care quality collapsing overnight; it largely reflects how much harder the bar became to clear under the new methodology. Clover Health faced a similarly dramatic situation: when its largest contract fell below 4 stars for 2026, analysts estimated it could eliminate most of the company’s pre-tax earnings.
Why this matters to you as a member: when a plan loses its 4-star status, it loses access to bonus payments that often fund the exact extras members value most — OTC allowances, dental coverage, reduced copays. A dropping star rating can be an early signal that a plan’s benefits may shrink at the next renewal, even before you see it reflected in your specific plan’s changes.
The Big Picture for 2026
Despite individual insurers like Humana and Clover Health seeing dramatic swings, the market overall has stabilized:
- The weighted average star rating across all plans sits around 3.96–3.99, roughly flat compared to the prior year, after several years of decline
- About 64% of Medicare Advantage enrollees are currently in plans rated 4 stars or higher — essentially unchanged from the year before
- Enrollment in 5-star plans remains small but growing slightly, at about 2.3% of total membership
- 34 contracts earned the full 5-star rating for 2026, up sharply from just 7 the year before
- Access remains strong overall — more than 99% of Medicare beneficiaries can choose from at least one Medicare Advantage plan, and 97% have 10 or more options
How to Actually Use Star Ratings When Comparing Plans
- Check the rating at the contract level, not just the carrier’s national average — the same company can have very different ratings across different contracts and states
- Don’t treat the stars as the only signal. A 4-star plan that doesn’t cover your doctors or medications is a worse fit than a 3.5-star plan that does — network and formulary matter just as much
- Understand why a rating changed before switching plans based on it — a drop may reflect industry-wide tighter cut points rather than an actual decline in the specific care you’d receive
- If a 5-star plan is available in your county, remember you have a special enrollment window — the 5-Star Special Enrollment Period lets you switch into it once per year, any time between December 8 and November 30, outside the standard windows
- Watch for a pattern, not just one year’s number — a plan hovering just below 4 stars for a couple of consecutive years is a different situation than one that dropped sharply in a single year due to methodology changes
Frequently Asked Questions
Do star ratings apply to individual plans or to the whole company? Ratings are assigned at the contract level, not to individual plan brochures or to the company as a whole. A single insurer can have several different contracts with different ratings, so check the specific contract your plan of interest falls under.
Why did some plans’ ratings drop so much for 2026 without a scandal or obvious quality problem? CMS tightened its methodology significantly for 2026 — reducing the weight of patient experience measures, introducing a new equity measure, and continuing to raise cut points. Some notable drops (like Humana’s) reflect these systemic changes more than a sudden decline in actual care quality.
What’s the practical effect of a plan losing its 4-star status? It loses access to Quality Bonus Payments from CMS, which often fund the extra benefits members value most — meaning a rating drop can be an early warning sign that a plan’s benefits might shrink at a future renewal.
Is a 5-star plan always the best choice? Not necessarily for you specifically — it’s a strong quality signal, but always weigh it against whether the plan’s network includes your doctors and whether its formulary covers your medications at a reasonable cost.
Can I switch to a 5-star plan any time of year? Yes, if one is available in your county. The 5-Star Special Enrollment Period lets you make this switch once per year, any time between December 8 and November 30.
Bottom Line
Star ratings are a genuinely useful quality signal, but 2026 is a good reminder that the underlying bar moves every year — a dramatic rating change doesn’t always mean a plan’s actual care changed just as dramatically. Use the ratings as one input alongside network coverage, formulary fit, and out-of-pocket costs, check the rating at the contract level rather than the company average, and remember that a nearby 5-star plan comes with a special, more flexible enrollment window if you want to switch.
Check your specific plan’s current rating using the official Medicare Plan Finder, or speak with a licensed insurance agent or your local State Health Insurance Assistance Program (SHIP) for free, unbiased guidance.
Disclaimer: Star rating figures, methodology details, and examples mentioned in this article reflect 2026 CMS data and industry reporting, and are subject to annual change. Always confirm current details directly with Medicare.gov, 1-800-MEDICARE, or a licensed agent before making a decision.