Medicare Advantage Star Ratings 2027: What Actually Changed

CMS’s Contract Year 2027 Medicare Advantage and Part D final rule, published April 2, 2026, removed 11 Star Ratings measures it judged too focused on administrative process to help a beneficiary tell one plan from another, kept the existing reward factor instead of adopting a new health-equity-weighted one, and — in a separate but related document four days later — raised its own baseline 2027 payment growth estimate from 0.09% to 2.48% between January and April. None of that changes the rating your client’s plan shows this AEP. All of it changes what that rating is worth by 2029, and reading it secondhand off three different FMO blog posts is exactly how you end up quoting a client the wrong number.

The pain: three blog posts, three different numbers

Here’s what actually happened while researching this article. A search for “how many Star Ratings measures did CMS cut for 2027” turned up one industry blog reporting 10, another reporting 11, and a wire-service headline implying the whole system got gutted. None of them were lying, exactly. They were each describing a different document, or rounding a number CMS itself changed between draft and final, and none of them told you which.

That’s the actual pain point, and it’s a specific one: you’re the person who has to say something accurate to a client or in a piece of content, and your source is a stack of FMO marketing emails that all summarized the same 100-plus-page rule in the fifteen minutes before their competitor’s newsletter went out. If you quote the wrong measure count, or tell a client their rating changed for a reason that’s actually two years out, you’re the one who sounds unreliable, not the blog you read it on.

What actually changed, in two sentences

CMS’s Contract Year 2027 Medicare Advantage and Part D final rule finalized the removal of 11 Star Ratings measures, framed as measures focused on administrative processes where plans perform too similarly for the score to tell a beneficiary anything useful, effective with the 2027 measurement year and first visible in the 2029 Star Ratings (CMS, Contract Year 2027 Medicare Advantage and Part D Final Rule Fact Sheet, April 2, 2026). Under the current measure set, Medicare Advantage Prescription Drug (MA-PD) contracts are rated on up to 43 measures, MA-only contracts on up to 33, and standalone Part D plans on up to 12 — cutting 11 measures is a real reduction in the total scoring surface, not a rounding change.

CMS also declined to implement a new reward, previously called the Health Equity Index and re-proposed as the “Excellent Health Outcomes for All” reward, and instead kept the existing reward factor, which rewards contracts for consistently high performance across all enrollees on all measures, unchanged for 2027 (same source). That’s a second real decision, separate from the measure cuts, and it matters because it means the mechanism CMS uses to reward consistency didn’t get rebuilt around equity-weighted outcomes the way an earlier proposal floated.

Source: CMS, Contract Year 2027 Medicare Advantage and Part D Final Rule Fact Sheet, April 2, 2026.

Why the story got confusing before it reached you

This isn’t one document. It’s at least four, published across seven months by the same agency, each covering a different slice of the same contract year, and each with its own headline number that trade press tends to lift without noting which document it came from.

Sources: CMS fact sheets and memo, dated as shown above; see full citation list at the end of this article.

Two things fall out of that table that explain most of the confusion you’ve probably run into.

First, the measure count moved between documents, on purpose, through the normal comment process. CMS’s proposed rule, published November 25, 2025, proposed cutting 12 measures. At least one commenter successfully argued to keep one of them — trade coverage attributes this to the diabetes eye-exam measure, though CMS’s own fact sheet doesn’t name the surviving measure — and the final rule cut 11. A source written off the proposed rule says 12. A source written off the final rule says 11. A source that split the 11 into six MA-only, one Part D-only, and three shared measures, then reported only one of those subtotals, produced the “10” you may have also seen. All three numbers are technically defensible depending on which document and which subset you’re reading. Only one of them, 11, is the actual final number.

Second, and more consequential for your AEP math, CMS’s own baseline payment-growth estimate for the same contract year moved from 0.09% in the January 26, 2026 advance notice to 2.48% in the April 6, 2026 final rate announcement — a swing of more than $12 billion in CMS’s own numbers, in ten weeks, on the same underlying rate calculation, before either figure accounts for the separate effect of coding-pattern trend. That’s not a media distortion. That’s what happened inside two CMS fact sheets you can read yourself.

What it costs: the money behind the stars

The reason a methodology change is worth your attention, and not just a policy-wonk curiosity, is that Star Ratings drive real payments to the plans your clients are enrolled in, and those payments are visibly shifting.

Medicare Advantage plans that earn 4 stars or higher get a Quality Bonus Payment: an additional 5 percentage points added to their county benchmark in most counties, or 10 percentage points in “double bonus” counties with historically high MA enrollment and low fee-for-service costs. Plans that are new to the market or have low enrollment get a smaller, 3.5-percentage-point boost regardless of rating (KFF, Medicare Advantage Quality Bonus Payments, July 1, 2026).

Sit those two KFF numbers next to each other and you get the actual story: fewer plans are qualifying for the bonus, and the total dollars flowing through the bonus program are still going up. That combination is exactly how a carrier ends up trimming the dental allowance or the OTC card in one county while the industry-wide bonus pool grows — the money isn’t spread evenly across every plan the way it might look from a single “MA spending is up” headline.

The applicable percentage matters here too, and it’s more granular than a flat “you get the bonus or you don’t.” A plan’s actual bonus payment per enrollee equals the gap between its bonus-adjusted benchmark and what the benchmark would be with no bonus, multiplied by a percentage tied to the star tier — KFF cites 65% for 4-star plans and 70% for plans at 4.5 stars or higher as the applicable percentages used in the 2025 calculation (same source). A plan sitting right at 4.0 versus one at 4.5 isn’t just “both bonus-qualifying” — the dollar difference between those two tiers is real and it’s built into the formula, not a rounding artifact.

A worked example: what the compensation change means for a renewal book

The Star Ratings and bonus-payment mechanics move money at the carrier level. The compensation memo moves money directly into your business, and the math is simple enough to run against your own book right now.

Sources: CMS memo, June 1, 2026 (CY2027) and CMS memo, June 18, 2025 (CY2026). Figures are maximum fair market value amounts, not guaranteed payouts — what you're actually paid depends on your specific upline agreement.

Run that against an illustrative solo book: 200 active Medicare Advantage clients in their renewal years. At the CY2026 renewal rate of $347, that book’s maximum renewal compensation pool is $69,400. At the CY2027 rate of $363, the same 200-client book’s maximum pool is $72,600 — a $3,200 increase from the rate change alone, before any new business, and before accounting for the fact that your actual contracted renewal rate with your upline is very likely below the CMS maximum.

How to read the primary documents yourself

This is the part we’re not holding back. If you want to verify any CMS regulatory claim yourself, including the ones in this article, here’s the actual process, with no tool required beyond a browser and the patience to open a PDF.

How Ambrose’s Brain gets this right without the game of telephone

Ambrose OS, the platform included with a Tech Savvy membership, ships an internal service the documentation calls the Brain: “an internal service that fronts 25+ federal/healthcare data MCPs (CMS, NADAC, FDA, Federal Register, FEMA, …),” confirmed directly in Ambrose’s Glossary and System Architecture pages this session (Ambrose docs, Glossary; Ambrose docs, System architecture). That count is documented as “25+,” not a fixed number, and it’s grown before — treat it as accurate as of August 2026 and expect the catalog to be larger by the time you’re reading this, so check the current docs rather than assuming this article’s figure still holds.

What that means in practice: instead of Googling a policy question and reading whichever FMO blog ranks first, you ask the question in the same chat window you already use for other agency work, and the answer is sourced back to the federal document behind it, because that’s the data the Brain is actually reaching, not a paraphrase layer on top of it. If a plain-English answer says “11 measures were removed,” you can follow that straight to the CMS fact sheet in one step, the same way this article did, rather than reconciling three blog posts that each summarized a different draft.

Be precise about what this is and isn’t. The Brain is a research and retrieval layer over primary federal data, documented as fronting sources like CMS, NADAC, FDA, and the Federal Register — it’s not a compliance officer and it doesn’t replace judgment about what to tell a specific client. Ambrose’s medicare-watchdog spoke, which we covered in detail in our guide to re-shopping your Medicare book, is the tool built specifically to scan your existing client contracts against current-year Star Ratings and plan data. The Brain is the tool for the question this article is actually about: what does the underlying federal rule say, and where’s the source, when the rule itself is what’s in question rather than a specific client’s plan.

The compliance layer this article sits inside

Everything above is regulatory and payment information, not marketing copy aimed at a beneficiary, but it’s still worth naming the two frameworks that govern how you use it once you’re in front of a client. If a conversation touches specific plan benefits, premiums, or a recommendation, CMS’s Medicare Communications and Marketing Guidelines still require the standard TPMO disclosure that you don’t represent every plan available in the service area, delivered before the marketing portion of the conversation, on top of the usual Scope of Appointment and call-recording obligations. Nothing in the CY2027 rule changes that requirement.

Separately, if you’re using any AI tool, including Ambrose, to help you read a regulation, draft a client explanation, or summarize a rule, the NAIC’s Model Bulletin on the Use of Artificial Intelligence Systems by Insurers, adopted December 4, 2023, sets the expectation that insurers and the producers acting for them maintain a written approach to how AI is used, keep a human reviewing what it produces before it reaches a consumer, document the process, and hold any vendor accountable for what its tool outputs (NAIC, Model Bulletin, December 4, 2023). A growing number of states have adopted the bulletin directly. Treat an AI-sourced summary, including anything in this article, as a starting point you verify against the primary document, not a final answer you repeat to a client unchecked.

What about Medicare Supplement, PDP-only, and ACA books

The measure and payment changes covered here are specific to Medicare Advantage and Part D Star Ratings. If a meaningful part of your book is Medicare Supplement, the Star Ratings mechanism doesn’t apply at all — Med Supp plans are standardized by letter (Plan G, Plan N, and so on) and priced by the carrier’s own underwriting and rate filings, not a CMS quality score. A PDP-only book is affected by the Part D side of this rule (up to 12 measures rated, one of the 11 removed measures applies to Part D) and by the Part D compensation increase, but not by the Medicare Advantage Quality Bonus Payment mechanics, since standalone Part D plans don’t receive an MA-style bonus.

If you also write ACA marketplace business, none of this rule touches that market directly — the ACA marketplace runs its own quality-rating system (the Quality Rating System, distinct from MA/Part D Star Ratings) under separate CMS rulemaking. Don’t let a client conflate “my Medicare Advantage plan’s rating” with “my marketplace plan’s rating” — they’re graded by different systems, on different schedules, under different rules.

Building this into how you read CMS news going forward

The compressed version of everything above, useful the next time CMS drops a new fact sheet: identify which of the four annual document types you’re reading (proposed rule, advance notice, final rule, final rate announcement), note its publication date, and treat any number from the proposed rule or advance notice as provisional until the final version confirms or changes it. For 2027 specifically, the sequence ran November 25 (proposed rule), January 26 (advance notice), April 2 (final rule), April 6 (final rate announcement), and June 1 (compensation memo) — expect a similar cadence for CY2028, and expect trade coverage to occasionally blend the stages the same way it did this year.

The close

Everything above, the document trail, the measure-count math, the compensation table, works whether you ever join anything or not — verifying a CMS number yourself just takes longer than asking. If you’d rather ask the question once and get an answer sourced to the actual federal document instead of triangulating three FMO blog posts against each other, one Ambrose seat, including access to the Brain, comes with a Tech Savvy Insurance membership: $97 a month, cancel anytime, and the weekly build-with-you calls are where agents actually learn to ask it well: https://techsavvyinsurance.com/.