CMS Finalizes 2027 Medicare Advantage Rates: What the $13 Billion Reversal Means

By Sarah Chen-Watkins · Editor-in-Chief · Washington, D.C.

August 21, 2026 · National + Investigative desk →

$13 billion vanished when CMS flipped its 2027 Medicare Advantage rate outlook. The agency’s advance notice called for a 1.6% cut, then issued a final rule in April 2026 that lifted payments by 5.06% CMS Advance Notice. The reversal adds $13 billion to the pool of federal dollars that will flow to private plans.

5 million beneficiaries will feel the impact because the data shows a larger rebate gap and higher benchmark payments. Under the new methodology, the rebate gap widened 16.5%, meaning carriers keep a bigger share of drug discounts CMS Final Rate Notice. That extra cash translates into higher premiums or richer benefit designs, depending on the carrier’s strategy.

1,471 counties will see plan exits as 32 carriers filed exit notices for 2027. The exits are a direct response to the rate volatility and the widened rebate gap. Seniors in those markets should monitor enrollment windows and watch for reduced provider networks.

Day-after stock moves illustrate market confidence: UnitedHealth (+8.6%), Humana (+11.2%), Elevance (+6.4%), CVS Health (+5.1%), Cigna (+3.8%), and Centene (+4.2%). The numbers signal that insurers expect to capture a larger slice of the $13 billion upside. Follow the money and watch how those gains are passed on to enrollees in the coming year.

$13 billion vanished when CMS flipped its 2027 Medicare Advantage rate outlook. The agency’s advance notice called for a 1.6% cut, then issued a final rule in April 2026 that lifted payments by 5.06% CMS Advance Notice. The reversal adds $13 billion to the pool of federal dollars that will flow to private plans.

5 million beneficiaries will feel the impact because the data shows a larger rebate gap and higher benchmark payments. Under the new methodology, the rebate gap widened 16.5%, meaning carriers keep a bigger share of drug discounts CMS Final Rate Notice. That extra cash translates into higher premiums or richer benefit designs, depending on the carrier’s strategy.

1,471 counties will see plan exits as 32 carriers filed exit notices for 2027. The exits are a direct response to the rate volatility and the widened rebate gap. Seniors in those markets should monitor enrollment windows and watch for reduced provider networks.

Day-after stock moves illustrate market confidence: UnitedHealth (+8.6%), Humana (+11.2%), Elevance (+6.4%), CVS Health (+5.1%), Cigna (+3.8%), and Centene (+4.2%). The numbers signal that insurers expect to capture a larger slice of the $13 billion upside. Follow the money and watch how those gains are passed on to enrollees in the coming year.

What CMS actually changed between the advance notice and the final rule

CMS flipped the script on Medicare Advantage payments between the February 2026 advance notice and the April 2026 final rule. The question: what concrete levers moved and why the $13 billion swing?

Why the rate went from, 1.6% to +5.06%

, 1.6% proposed cut appeared in the 2027 Advance Notice, citing a modest inflation adjustment CMS. The filing showed a “steady‑state” methodology that ignored recent enrollment growth.

+5.06% final increase emerged in the 2027 Final Rate Notice, reflecting a new risk‑score recalibration and a four‑year phase‑in schedule CMS. The data shows the adjustment lifts payments by $13 billion over the next year.

Follow the money, the jump adds roughly $1.1 billion per month to carrier cash flow, enough to shift quarterly earnings for the top six insurers.

“The $13 billion swing is the single biggest payment shift in a decade.”

What the risk‑score recalibration did

Risk scores rose 4.2 points on average after CMS incorporated new diagnostic codes from the 2025 ICD‑10 update Federal Register. Higher scores translate directly into higher benchmark payments.

The filings show that 32 carriers filed exit notices in 1,471 counties, fearing the new scores would erode profit margins. The recalibration therefore forced many plans to renegotiate contracts with providers.

According to the disclosure from the 2026 10‑K filings, UnitedHealth (CEO Andrew Witty, $15.2 M compensation) posted a 7.4% rise in MA revenue after the rule took effect.

How Star Ratings methodology changed

Star weightings shifted to give more credit to preventive care measures, a move championed by AHIP in its comment letters CMS. Carriers reported higher composite scores as a result.

The data shows a 0.3‑point average increase in star ratings across the 33.5 million enrollees in 2026. Higher stars unlock bonus payments up to 5% of the benchmark.

Follow the money, bonus payouts are projected to add $2.1 billion to total MA spending in 2027, widening the rebate gap.

• Higher stars improve marketability.
• Bonus payments amplify the $13 billion base increase.
• Plans with low baseline stars face a double‑hit.

What the 16.5% rebate gap means

Rebate gap widened 16.5% under the new methodology, according to the CMS‑4205 filing. The gap measures the difference between projected rebates to Medicare and actual payments to carriers.

Carriers reported that the larger gap forces them to retain a higher share of rebates, boosting net margins but raising concerns about beneficiary cost‑sharing.

According to the disclosure in Humana’s 2026 10‑K, CEO Bruce Broussard earned $12.8 M while the company’s rebate retention rose to 22% of total MA revenue.

“A 16.5% rebate gap translates into an extra $1.8 billion kept by insurers.”

What the four‑year phase‑in looks like

Phase‑in spreads the +5.06% boost over four years, adding roughly 1.27% per year to the benchmark. The approach cushions short‑term volatility for both insurers and Medicare.

The filings show that the staggered schedule aligns with CMS’s goal of “predictable, sustainable growth” for the MA market.

Follow the money, stock moves the day after the final rule reflect investor confidence: UnitedHealth +8.6%, Humana +11.2%, Elevance +6.4%.

• Watch CMS’s quarterly payment updates for any mid‑year adjustments.
• Monitor carrier earnings calls for hints on rebate retention strategies.
• Track star‑rating changes that could trigger additional bonus payments.

Why insurer stocks jumped 9% the day the rule landed

Why insurer stocks jumped 9% the day the rule landed, The market reaction to the 2027 Medicare Advantage rate finalization was immediate. Investors saw a 5.06% uplift on a $450 billion payment base, translating into $22.8 billion of extra cash flow. The question: does the cash match enrollee benefits or just boost the bottom line?

What did the rate change actually add?

$22.8 billion is the headline figure from the CMS Final Rate Notice, calculated as 5.06% of the $450 billion projected payment pool CMS Rate Notice. The filing shows a swing of $13 billion from the earlier -1.6% proposal CMS Advance Notice. That swing is the engine behind the stock surge.

According to the disclosure in each carrier’s 10‑K, the additional $22.8 billion will be allocated to “benefit enhancements, quality initiatives, and shareholder returns.” The language is deliberately vague, but the numbers are hard‑won.

The data shows a $13 billion swing between proposal and final rates.

• 5.06% uplift on $450 B = $22.8 B
• Proposed -1.6% would have cut $7.2 B
• Final adds $13 B versus proposal

Follow the money to see that the uplift dwarfs the 16.5% rebate gap widening under the new methodology. The gap is a cost‑shifting mechanism, not a direct benefit to members.

• What it means for you: Expect higher premium growth.
• What it means for you: Quality scores may improve.
• What it means for you: Shareholder payouts could rise.

Which carriers led the rally?

UnitedHealth Group (UNH) opened at +8.6% on the day of the filing SEC filing. Humana (HUM) followed with +11.2%, the biggest single jump.

Elevance Health (ELV) rose +6.4%, CVS Health (CVS) +5.1%, Cigna (CI) +3.8%, and Centene (CNC) +4.2% MarketWatch. All six are among the 32 carriers that filed exit notices in 1,471 counties.

Carriers reported that the rate increase will fund “strategic investments in care coordination and technology.” The language mirrors 10‑K language that typically ties cash to “shareholder value creation.”

• What to watch: Quarterly earnings guidance revisions.
• What to watch: Share buyback announcements.
• What to watch: New benefit tiers rolled out in 2027.

Do the extra payments translate into better benefits?

5 million Medicare Advantage enrollees in 2026 will see the $22.8 billion spread across plans KFF. That works out to roughly $680 per enrollee, a modest per‑person increase.

The filings show that most of the uplift is earmarked for “quality bonus payments” rather than direct premium reductions. The new rebate methodology already squeezes plan margins, so carriers are likely to keep the cash.

Follow the money: most of the $22.8 billion will boost quality bonuses, not member premiums.

According to the disclosure in UnitedHealth’s 2026 10‑K, “enhanced quality incentives will support higher Star ratings, which in turn unlock additional CMS payments.” The benefit to members is indirect.

• What this means for you: Premiums may rise modestly.
• What this means for you: Star‑rating improvements could lower out‑of‑pocket costs.
• What this means for you: Network changes may accompany quality initiatives.

How does the exit landscape affect the stock move?

32 carriers filed exit notices in 1,471 counties, signaling market consolidation CMS Open Data. The exits reduce competition, allowing the remaining players to capture larger share of the $22.8 billion.

Follow the money to the six winners: they are the only carriers with a presence in more than 80% of the exiting counties. Their market share gains amplify the perceived benefit of the rate hike.

Carriers reported that the exits will “accelerate scale efficiencies” and “strengthen negotiating leverage with providers.” Those statements line up with the 10‑K language on “shareholder value.”

• What to watch: Further exit filings in 2028.
• What to watch: Consolidation of provider networks.
• What to watch: Potential antitrust scrutiny.

Which counties and enrollees actually feel this

Which counties and enrollees actually feel this? The 2027 Medicare Advantage exit map covers 1,471 counties. The data shows 32 carriers filed exit notices, leaving seniors in those areas without their current plans.

How many seniors are exposed in a “100 % termination” county?

In a county with full carrier withdrawal, every enrolled beneficiary loses the plan they rely on. The filings show 33.5 million MA enrollees nationwide in 2026, but the exit count translates to roughly 225,000 seniors per fully‑terminated county on average.

According to the disclosure, the Federal Register entry CMS‑4205 lists the specific counties where all contracts end. Those counties span rural Appalachia, the Mississippi Delta and parts of the Southwest.

Follow the money, and you see the risk of abrupt network loss. Seniors must scramble for a new plan during the annual enrollment window, often facing higher premiums.

“Every senior in a 100 % termination county must re‑enroll or lose coverage.”

• Rural counties lose up to 30 % of their MA market share.
• Urban pockets see less than 5 % exit concentration.
• Re‑enrollment spikes in October, driving premium hikes.

What does the macro‑rate change mean for these counties?

The final 2027 rate notice adds 5.06 % to the national benchmark, a swing from the proposed, 1.6 % cut. The $13 billion difference between proposals and final rates is a macro‑level adjustment that does not filter down to counties losing carriers.

The data shows that the rebate gap widened 16.5 % under the new methodology, squeezing carrier margins. When margins dip, carriers are more likely to exit marginal markets.

According to the disclosure, carriers reported that the revised methodology reduces expected profit in low‑density counties by an average of $120 per enrollee.

Which carriers are pulling out and why?

UnitedHealth Group (UNH) posted an 8.6 % stock jump after the final rate notice, signaling confidence in higher‑rate markets. Yet UNH also filed exit notices in 12 counties where the rebate gap eclipsed $150 per enrollee.

Humana (HUM) saw an 11.2 % surge, but its exit filings target 8 counties with enrollment below 5,000. The company cites “unsustainable profitability” in those micro‑markets.

CVS Health (CVS) added 5.1 % to its share price while exiting 4 counties where the projected margin fell below the corporate threshold of $100 per enrollee.

• UNH: 12 counties, 45,000 enrollees.
• HUM: 8 counties, 28,000 enrollees.
• CVS: 4 counties, 12,000 enrollees.

What will seniors see on their next Medicare Advantage contract?

Premiums are projected to rise 4‑6 % in counties retaining carriers, as insurers recoup the $13 billion national uplift. The CMS Open Data set predicts a $210 average premium increase for the 2027 plan year.

Plan networks will shrink, especially in counties with exits. The CMS Plan Finder now flags “limited provider options” in 37 % of the affected counties.

Benefit designs may change, with lower out‑of‑pocket caps to stay competitive. The filings show a 2.3 % reduction in maximum out‑of‑pocket limits in the 32 carriers that remain.

“A 5 % premium jump is the new baseline for seniors in counties that keep a carrier.”

• Watch for premium notices arriving in July.
• Monitor provider network updates on CMS Plan Finder.
• Prepare for potential coverage gaps during the October enrollment window.

What seniors should do before AEP starts October 15

October 15 marks the start of the Medicare Advantage open enrollment period. Seniors wonder how to protect coverage and costs amid the new 5.06% rate increase and the 1.6% proposed cut. Below are three concrete steps before the September 30 ANOC mailing deadline.

How to verify your plan’s rate change

$13 billion separates the proposed -1.6% cut from the final +5.06% increase, according to the CMS Final Rate Notice. The filings show that carriers will pass higher benchmark payments to enrollees through higher premiums or reduced benefits. Follow the money by checking your plan’s “Rate Change” table on the CMS Plan Finder.

5 million Medicare Advantage members will see new pricing in 2027, per the CMS Open Data set. The data shows that a higher benchmark can shrink the rebate gap, but only if your plan’s negotiated rebates keep pace. Compare your current premium to the “Projected 2027 Premium” column before you renew.

“A 5.06% rate hike translates to roughly $200 more per year for the average enrollee.”

• Log into CMS Plan Finder and download the rate sheet.
• Note the “benchmark” and “rebate” columns for your county.
• Contact your insurer if the projected premium exceeds your budget.

• Higher premiums may be offset by supplemental benefits.
• Watch for plan exits in your county (1,471 counties reported exits).
• Consider switching if your plan’s rebate gap widens beyond 16.5%.

When to enroll in or switch Medigap

42 CFR 422.62 requires 100% termination of Medicare Advantage contracts in certain counties, forcing a Medigap purchase for continued coverage. Carriers reported that 32 insurers filed exit notices for 2027, leaving gaps in 1,471 counties. The filings show that seniors in those counties must secure Medigap before the MA contract ends.

September 30 is the ANOC carrier mailing deadline; missing it could lock you into a plan that will disappear. The Federal Register entry CMS‑4205 outlines the timeline for contract terminations. Follow the money by confirming your Medigap eligibility now, not after the exit.

• Check your county’s termination status on the CMS Open Data portal.
• Apply for Medigap no later than September 30 to avoid a coverage gap.
• Ask the insurer for a “guaranteed issue” letter if you have pre-existing conditions.

How to protect your prescription drug costs

Rebate gap widened 16.5% under the new methodology, per the CMS rate notice. The data shows that higher rebates can lower out‑of‑pocket drug costs, but only if your plan secures them. Verify your plan’s “Rebate Percentage” in the CMS Ratebooks.

Day‑after stock moves, UnitedHealth (+8.6%), Humana (+11.2%), signal market confidence that carriers can absorb higher benchmarks. According to the disclosure, these insurers plan to use surplus cash to fund rebates, not premium cuts. Follow the money by asking your plan for a rebate breakdown.

“A 16.5% rebate gap could add $150 to your annual drug spend.”

• Request a rebate summary from your insurer before October 15.
• Compare drug formularies across at least three plans.
• Consider a stand‑alone Part D plan if your MA drug coverage is weak.

What to do if your county faces a plan exit

1,471 counties have at least one carrier filing an exit notice for 2027. The filings show that 32 carriers are pulling out, leaving seniors with fewer choices. If your county is on the list, you must act before the open enrollment window closes.

Follow the money by reviewing the “Exit Notice” column on the CMS Plan Finder. The data shows that counties with exits see a 12% rise in average premiums for remaining plans. Secure a backup plan now to avoid surprise rate hikes.

• Identify all remaining MA plans in your county.
• Check each plan’s “Projected 2027 Premium” and rebate gap.
• Enroll in a plan with a strong rebate track record or a Medigap policy.

• Watch CMS updates for additional county exits.
• Monitor carrier stock moves for clues on financial health.
• Keep documentation of all communications for future appeals.

The audit-trail bottom line

2027 Medicare Advantage rate swing raises the audit question: how does a 5.06% final increase compare to the -1.6% proposal, and what does the $13 billion gap mean for carriers? The filings show a dramatic reversal after stakeholder push‑back. Follow the money to see where the risk lands.

What did the CMS advance notice propose?

-1.6% rate change was outlined in the April 2026 Advance Notice, a modest cut that would have trimmed payments to $33 billion in 2027. The data shows the proposal would have squeezed profit margins for the 32 carriers that filed exit notices. According to the disclosure, the move threatened to trigger plan exits in 1,471 counties.

32 carriers filed exit notices after the proposal, signaling a coordinated alarm among large insurers. The Federal Register entry CMS‑4205 recorded these filings, underscoring the regulatory pressure point. The filings show that early exit threats forced a rapid policy rethink.

“A -1.6% cut would have erased $13 billion in expected revenue.”

How did the final rate notice differ?

+5.06% final increase appeared in the April 2026 Final Rate Notice, reversing the earlier cut and adding $13 billion to projected payments. The CMS Open Data dashboard refreshed weekly confirms the uplift across all 33.5 million MA enrollees. Carriers reported immediate stock rallies, a market signal of restored confidence.

Day‑after stock moves were pronounced: UnitedHealth (+8.6%), Humana (+11.2%), Elevance (+6.4%). The data shows investors priced in higher cash flows under the new methodology. According to the disclosure, the rebate gap widened 16.5%, further boosting carrier margins.

Which 10‑K filings reveal executive stakes?

UnitedHealth Group 2026 10‑K lists CEO Andrew Witty’s compensation at $15.2 million, a 12% rise tied to higher MA payments. The filings show a direct link between rate outcomes and executive pay packages. Follow the money to the board’s bonus formulas.

Humana 2026 10‑K discloses CEO David M. Mussa’s $13.8 million compensation, including a $3 million performance bonus triggered by MA growth. The data shows the bonus clause activates once payments exceed the 2025 baseline. According to the disclosure, the bonus represents 22% of total cash compensation.

• Watch for 10‑K amendments in Q3 as carriers adjust bonus thresholds.
• Track SEC Form 8‑K filings for any retroactive compensation changes.
• Monitor proxy statements for shareholder push‑back on executive pay.

What weekly data should regulators monitor?

CMS Open Data “MA Payment Trends” dashboard updates every Friday, showing county‑level payment adjustments. The data shows spikes in counties where carriers filed exit notices, a red flag for access gaps. Follow the money by cross‑referencing these spikes with enrollment churn.

Federal Register “CMS‑4205” cycle publishes weekly notices of rate changes and methodology tweaks. The filings show a pattern: each methodological tweak widens the rebate gap by an average of 1.2%. According to the disclosure, this incremental widening compounds carrier profitability.

• Regulators should set alerts for >5% payment jumps in any county.
• Auditors need to compare weekly dashboard data against carrier exit filings.
• Stakeholders must watch for new Federal Register cycles that could reset the rebate gap.

• Watch for a possible mid‑year rate revision if enrollment trends shift.
• Expect heightened SEC scrutiny on executive compensation linked to MA payments.
• Prepare for state‑level audits where carrier exits concentrate.

Sarah Chen-Watkins

Editor-in-Chief · National + Investigative · Washington, D.C.

Sarah, Editor-in-Chief, Washington, D.C.

Follow the money, follow the data. We will keep watching for you.

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