Medicare Advantage market share by carrier
Which parent carriers hold Medicare Advantage enrollment, nationally and in every state and county. Built from the CMS Monthly Enrollment by Contract/Plan/State/County (CPSC) file, aggregated from contract level up to the parent organisation, with the same month a year earlier for comparison.
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Data month
September 2026
Advantage enrollees counted
35,552,879
+2.6% vs September 2025
Parent carriers
166
Top five carrier share
68.7%
3,259 counties covered
In September 2026, UnitedHealth Group, Inc. led Medicare Advantage with 9,245,550 enrollees (26.0% of counted enrollment), and the five largest parent organisations together held 68.7%.
Ten largest carriers
CMS Monthly Enrollment by Contract/Plan/State/County (CPSC) · September 2026
National carrier league table
| # | Parent organisation | Enrollees | Share | Counties | vs September 2025 |
|---|---|---|---|---|---|
| 1 | UnitedHealth Group, Inc. | 9,245,550 | 26.0% | 3,256 | -8.9% |
| 2 | Humana Inc. | 7,107,757 | 20.0% | 3,259 | +23.9% |
| 3 | CVS Health Corporation | 4,111,243 | 11.6% | 3,257 | -0.3% |
| 4 | Kaiser Foundation Health Plan, Inc. | 2,066,150 | 5.8% | 834 | +4.5% |
| 5 | Elevance Health, Inc. | 1,874,007 | 5.3% | 3,257 | -15.5% |
| 6 | Centene Corporation | 893,139 | 2.5% | 2,252 | -5.9% |
| 7 | Health Care Service Corporation | 876,254 | 2.5% | 3,255 | -6.3% |
| 8 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 665,250 | 1.9% | 3,255 | -15.4% |
| 9 | Devoted Health, Inc. | 520,966 | 1.5% | 1,316 | +155.5% |
| 10 | SCAN Group | 459,086 | 1.3% | 527 | +48.8% |
| 11 | Highmark Health | 415,628 | 1.2% | 3,255 | -12.8% |
| 12 | MHH Healthcare, L.P. | 377,154 | 1.1% | 282 | +9.4% |
| 13 | Healthfirst, Inc. | 371,872 | 1.0% | 3,163 | +3.3% |
| 14 | Lifetime Healthcare, Inc. | 332,328 | 0.9% | 3,215 | +18.8% |
| 15 | Alignment Healthcare USA, LLC | 297,297 | 0.8% | 3,255 | +30.9% |
| 16 | Aware Integrated, Inc. | 295,009 | 0.8% | 3,255 | +44.5% |
| 17 | Corewell Health | 284,908 | 0.8% | 3,137 | +12.7% |
| 18 | Guidewell Mutual Holding Corporation | 257,008 | 0.7% | 3,216 | -4.5% |
| 19 | UPMC Health System | 225,754 | 0.6% | 3,239 | -1.0% |
| 20 | Molina Healthcare, Inc. | 219,687 | 0.6% | 1,085 | +1.2% |
| 21 | BlueCross BlueShield of Tennessee | 218,068 | 0.6% | 3,215 | +5.0% |
| 22 | CuraCor Solutions Corp. | 183,612 | 0.5% | 3,138 | +11.2% |
| 23 | Clover Health Holdings, Inc. | 156,849 | 0.4% | 316 | +46.4% |
| 24 | Independence Health Group, Inc. | 148,895 | 0.4% | 3,215 | -3.0% |
| 25 | Point32Health, Inc. | 147,420 | 0.4% | 128 | +0.4% |
| 26 | Medica Holding Company | 140,532 | 0.4% | 3,077 | +69.3% |
| 27 | Network Health, Inc. | 132,208 | 0.4% | 3,255 | +53.9% |
| 28 | Henry Ford Health System | 132,027 | 0.4% | 3,215 | +54.3% |
| 29 | California Physicians' Service | 120,877 | 0.3% | 3,256 | -9.1% |
| 30 | BlueCross BlueShield of Alabama | 118,501 | 0.3% | 3,137 | +1.2% |
| 31 | Risant Health, Inc. | 118,296 | 0.3% | 175 | +0.5% |
| 32 | Trinity Health Corporation | 99,549 | 0.3% | 415 | +80.7% |
| 33 | Sanford Health | 91,750 | 0.3% | 307 | +904.0% |
| 34 | MEDICAL MUTUAL OF OHIO | 89,682 | 0.3% | 3,255 | -13.0% |
| 35 | Blue Cross and Blue Shield of Massachusetts, Inc. | 86,920 | 0.2% | 3,138 | -11.5% |
| 36 | CareSource | 82,625 | 0.2% | 544 | +234.2% |
| 37 | Blue Cross & Blue Shield of Rhode Island | 76,311 | 0.2% | 3,255 | -2.0% |
| 38 | Horizon Mutual Holdings, Inc | 76,178 | 0.2% | 3,147 | -4.3% |
| 39 | Visiting Nurse Service of New York | 72,022 | 0.2% | 100 | +105.3% |
| 40 | Cambia Health Solutions, Inc. | 70,733 | 0.2% | 3,138 | -14.3% |
| 41 | Intermountain Health Care, Inc. | 66,643 | 0.2% | 197 | -2.3% |
| 42 | Martin's Point Health Care, Inc. | 66,121 | 0.2% | 3,255 | -22.5% |
| 43 | Providence St Joseph Health | 63,716 | 0.2% | 87 | -19.7% |
| 44 | Lumeris Group Holdings Corporation | 60,955 | 0.2% | 168 | +10.1% |
| 45 | HealthPartners, Inc. | 59,827 | 0.2% | 3,101 | +17.4% |
| 46 | MVP Health Care, Inc. | 58,362 | 0.2% | 3,216 | -20.1% |
| 47 | Louisiana Health Service & Indemnity Company | 56,631 | 0.2% | 3,255 | +22.5% |
| 48 | Allina Health and Aetna Insurance Holding Company | 56,605 | 0.2% | 3,137 | +91.1% |
| 49 | PacificSource | 54,729 | 0.2% | 206 | +6.2% |
| 50 | CareFirst, Inc. | 54,212 | 0.2% | 3,255 | +83.5% |
Showing the 50 largest of 166 parent organisations.
By state
Penetration is Advantage share of all Medicare beneficiaries from CMS Medicare Monthly Enrollment, 2024.
| State | Advantage enrollees | Leading carrier | Leader share | Carriers | Penetration |
|---|---|---|---|---|---|
| California | 3,710,031 | Kaiser Foundation Health Plan, Inc. | 41.1% | 127 | 50.7% |
| Florida | 3,049,980 | Humana Inc. | 38.1% | 127 | 56.1% |
| Texas | 2,735,120 | UnitedHealth Group, Inc. | 47.9% | 125 | 53.4% |
| New York | 2,162,046 | CVS Health Corporation | 18.6% | 105 | 52.1% |
| Pennsylvania | 1,635,578 | CVS Health Corporation | 27.2% | 92 | 52.9% |
| Ohio | 1,476,991 | UnitedHealth Group, Inc. | 23.1% | 96 | 55.8% |
| Michigan | 1,464,676 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 36.6% | 91 | 61.5% |
| North Carolina | 1,331,757 | Humana Inc. | 33.5% | 103 | 55.3% |
| Georgia | 1,120,044 | Humana Inc. | 29.4% | 106 | 54.8% |
| Illinois | 1,078,152 | CVS Health Corporation | 31.9% | 88 | 42.8% |
| Tennessee | 806,862 | UnitedHealth Group, Inc. | 28.4% | 96 | 52.4% |
| Arizona | 802,868 | UnitedHealth Group, Inc. | 40.6% | 99 | 50.3% |
| Washington | 780,858 | UnitedHealth Group, Inc. | 45.7% | 95 | 48.7% |
| New Jersey | 760,895 | CVS Health Corporation | 30.6% | 84 | 40.3% |
| Wisconsin | 739,071 | UnitedHealth Group, Inc. | 37.3% | 81 | 56.9% |
| Missouri | 737,694 | UnitedHealth Group, Inc. | 44.9% | 82 | 53.0% |
| Indiana | 716,600 | UnitedHealth Group, Inc. | 35.3% | 85 | 49.3% |
| Alabama | 695,994 | Humana Inc. | 33.2% | 80 | 59.4% |
| Puerto Rico | 676,025 | MHH Healthcare, L.P. | 53.0% | 66 | 85.4% |
| Virginia | 674,361 | Humana Inc. | 34.2% | 99 | 38.1% |
| Minnesota | 598,620 | Aware Integrated, Inc. | 49.2% | 83 | 59.4% |
| South Carolina | 595,987 | Humana Inc. | 37.5% | 91 | 45.4% |
| Colorado | 557,957 | UnitedHealth Group, Inc. | 44.7% | 96 | 52.1% |
| Louisiana | 553,703 | Humana Inc. | 41.7% | 80 | 55.8% |
| Kentucky | 540,939 | Humana Inc. | 53.6% | 86 | 53.5% |
| Massachusetts | 533,013 | Point32Health, Inc. | 23.3% | 93 | 35.4% |
| Oregon | 518,912 | UnitedHealth Group, Inc. | 30.1% | 92 | 54.6% |
| Connecticut | 445,344 | CVS Health Corporation | 43.2% | 78 | 56.2% |
| Oklahoma | 345,304 | UnitedHealth Group, Inc. | 41.7% | 81 | 40.4% |
| Nevada | 327,025 | UnitedHealth Group, Inc. | 30.4% | 92 | 50.7% |
| Arkansas | 317,734 | UnitedHealth Group, Inc. | 40.7% | 72 | 45.0% |
| Maryland | 294,173 | Kaiser Foundation Health Plan, Inc. | 25.7% | 87 | 24.0% |
| Mississippi | 290,331 | Humana Inc. | 43.5% | 71 | 42.8% |
| Utah | 268,264 | UnitedHealth Group, Inc. | 47.1% | 77 | 51.8% |
| Iowa | 244,864 | CVS Health Corporation | 32.6% | 74 | 37.1% |
| New Mexico | 239,080 | UnitedHealth Group, Inc. | 33.8% | 79 | 49.7% |
| West Virginia | 238,973 | Humana Inc. | 49.3% | 69 | 53.7% |
| Maine | 228,921 | Martin's Point Health Care, Inc. | 28.9% | 71 | 57.3% |
| Kansas | 196,791 | UnitedHealth Group, Inc. | 39.3% | 69 | 33.2% |
| Idaho | 188,342 | UnitedHealth Group, Inc. | 42.3% | 73 | 48.6% |
| Hawaii | 168,609 | UnitedHealth Group, Inc. | 29.9% | 71 | 53.5% |
| Rhode Island | 150,277 | Blue Cross & Blue Shield of Rhode Island | 50.5% | 64 | 59.1% |
| Nebraska | 126,190 | UnitedHealth Group, Inc. | 41.3% | 66 | 33.7% |
| New Hampshire | 110,323 | Humana Inc. | 38.6% | 70 | 34.6% |
| Delaware | 83,735 | UnitedHealth Group, Inc. | 41.1% | 67 | 31.9% |
| Montana | 77,821 | Humana Inc. | 70.3% | 63 | 29.5% |
| South Dakota | 45,853 | Medica Holding Company | 38.8% | 68 | 36.0% |
| District of Columbia | 33,636 | UnitedHealth Group, Inc. | 62.3% | 57 | 33.0% |
| North Dakota | 31,112 | Medica Holding Company | 36.3% | 59 | 34.2% |
| Vermont | 19,663 | Humana Inc. | 40.3% | 62 | 32.5% |
| Wyoming | 18,243 | UnitedHealth Group, Inc. | 48.0% | 61 | 17.9% |
| VI | 5,537 | UnitedHealth Group, Inc. | 99.7% | 37 | — |
| Alaska | 2,000 | CVS Health Corporation | 50.9% | 64 | 2.6% |
| AS | 0 | — | — | 32 | — |
| GU | 0 | — | — | 29 | — |
| MP | 0 | — | — | 23 | — |
What is missing
CMS suppresses any plan-county cell with fewer than 11 enrollees. Those enrollees are missing from these counts, so every figure is a floor, not an exact total.
2,244,911 plan-county cells were suppressed in September 2026.
What is counted
Counts cover Medicare Advantage contracts only (Local CCP, Regional CCP, PFFS and MSA). Standalone Part D drug plans, cost plans, HCPP and PACE contracts are excluded.
Source: CMS Monthly Enrollment by Contract/Plan/State/County (CPSC).
Common questions
Where does this Medicare Advantage market share data come from?
The CMS Monthly Enrollment by Contract/Plan/State/County (CPSC) files. Every Medicare Advantage contract is mapped to its parent organisation, then enrollment is summed by county, state and nationally.
Which plans are counted as Medicare Advantage?
Contracts whose CMS organisation type is Local CCP, Regional CCP, PFFS or MSA. Standalone Part D drug plans, cost plans, HCPP and PACE contracts are excluded, so the totals are Advantage enrollment rather than all Medicare plan enrollment.
Why do the county numbers not add up to the national total?
CMS suppresses any plan-county cell with fewer than 11 enrollees. Those enrollees are simply missing from the file. We show how many cells were suppressed rather than filling the gap with an estimate, so treat every count as a floor.
Can I see Medicare Advantage enrollment by doctor or practice?
No, and neither can anyone else — CMS does not publish provider-level Medicare Advantage enrollment. Carrier by county is the finest public grain available. Provider-level Medicare data exists only for fee-for-service claims.
How current is it?
The page uses the most recent month CMS has published, with the same month a year earlier for comparison. County penetration is from the CMS Medicare Monthly Enrollment file, which is annual and lags the monthly plan file.
Is it free?
Yes, no account needed. RepVector uses this plus sixty other public sources to rank markets and build target lists for health and life-sciences teams.
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