Free tool · public CMS data
Missouri Medicare Advantage market share
In September 2026, 737,694 Missouri Medicare beneficiaries were enrolled in a Medicare Advantage plan across 82 parent carriers and 115 counties, led by UnitedHealth Group, Inc. with 44.9% of counted enrollment.
Data month
September 2026
Advantage enrollees
737,694
+2.4% vs September 2025
Parent carriers
82
Advantage penetration
53.0%
CMS Medicare Monthly Enrollment, 2024
Carriers in Missouri
CMS Monthly Enrollment by Contract/Plan/State/County (CPSC) · September 2026
| # | Parent organisation | Enrollees | Share | Counties | vs September 2025 |
|---|---|---|---|---|---|
| 1 | UnitedHealth Group, Inc. | 331,531 | 44.9% | 115 | -7.6% |
| 2 | Humana Inc. | 164,391 | 22.3% | 115 | +78.1% |
| 3 | CVS Health Corporation | 118,979 | 16.1% | 115 | -13.6% |
| 4 | Lumeris Group Holdings Corporation | 45,268 | 6.1% | 46 | +6.4% |
| 5 | Elevance Health, Inc. | 26,464 | 3.6% | 115 | -56.3% |
| 6 | Devoted Health, Inc. | 26,197 | 3.6% | 66 | +504.3% |
| 7 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 8,909 | 1.2% | 115 | -4.3% |
| 8 | Centene Corporation | 6,338 | 0.9% | 71 | +15.3% |
| 9 | CoxHealth | 4,346 | 0.6% | 21 | +13.5% |
| 10 | Health Care Service Corporation | 3,048 | 0.4% | 115 | +0.7% |
| 11 | Rifkin Managed Care Holding, LLC | 1,353 | 0.2% | 66 | -3.3% |
| 12 | Mitchell Family Office | 743 | 0.1% | 37 | +45.1% |
| 13 | Missouri Healthcare Advisors, LLC | 127 | 0.0% | 30 | +36.6% |
| 14 | Alignment Healthcare USA, LLC | 0 | 0.0% | 115 | — |
| 15 | Allina Health and Aetna Insurance Holding Company | 0 | 0.0% | 115 | — |
| 16 | Aspirus, Inc. | 0 | 0.0% | 2 | — |
| 17 | Astiva Health Holdings Incorporated | 0 | 0.0% | 1 | — |
| 18 | Athena Healthcare Holdings, LLC | 0 | 0.0% | 1 | — |
| 19 | Aultman Health Foundation | 0 | 0.0% | 115 | — |
| 20 | Aware Integrated, Inc. | 0 | 0.0% | 115 | — |
| 21 | BayCare Health System, Inc. | 0 | 0.0% | 1 | — |
| 22 | Baystate Health, Inc. | 0 | 0.0% | 115 | — |
| 23 | Blue Cross & Blue Shield of Rhode Island | 0 | 0.0% | 115 | — |
| 24 | Blue Cross and Blue Shield of Massachusetts, Inc. | 0 | 0.0% | 115 | — |
| 25 | Blue Cross Blue Shield of Arizona | 0 | 0.0% | 3 | — |
| 26 | Blue Cross Blue Shield of Kansas | 0 | 0.0% | 115 | — |
| 27 | Blue Cross Blue Shield of Nebraska | 0 | 0.0% | 115 | — |
| 28 | BlueCross BlueShield of Alabama | 0 | 0.0% | 115 | — |
| 29 | BlueCross BlueShield of South Carolina (BCBSSC) | 0 | 0.0% | 115 | — |
| 30 | BlueCross BlueShield of Tennessee | 0 | 0.0% | 115 | — |
| 31 | California Physicians' Service | 0 | 0.0% | 115 | — |
| 32 | Cambia Health Solutions, Inc. | 0 | 0.0% | 115 | — |
| 33 | CAPITAL BLUE CROSS | 0 | 0.0% | 115 | — |
| 34 | CareFirst, Inc. | 0 | 0.0% | 115 | — |
| 35 | CareSource | 0 | 0.0% | 3 | — |
| 36 | Clover Health Holdings, Inc. | 0 | 0.0% | 2 | — |
| 37 | Corewell Health | 0 | 0.0% | 115 | — |
| 38 | CuraCor Solutions Corp. | 0 | 0.0% | 115 | — |
| 39 | EmblemHealth, Inc. | 0 | 0.0% | 115 | — |
| 40 | Fallon Community Health Plan, Inc. | 0 | 0.0% | 115 | — |
| 41 | Fenyx Health Holdings, Inc. | 0 | 0.0% | 115 | — |
| 42 | General Catalyst Group Management Holdings LP | 0 | 0.0% | 115 | — |
| 43 | Gold Kidney Health Plan | 0 | 0.0% | 1 | — |
| 44 | Guidewell Mutual Holding Corporation | 0 | 0.0% | 115 | — |
| 45 | Hawaii Medical Service Association | 0 | 0.0% | 115 | — |
| 46 | Healthfirst, Inc. | 0 | 0.0% | 115 | — |
| 47 | HealthPartners, Inc. | 0 | 0.0% | 115 | — |
| 48 | Henry Ford Health System | 0 | 0.0% | 115 | — |
| 49 | Highmark Health | 0 | 0.0% | 115 | -100.0% |
| 50 | Horizon Mutual Holdings, Inc | 0 | 0.0% | 115 | — |
| 51 | Imperial Health Plan of California | 0 | 0.0% | 4 | — |
| 52 | Independence Health Group, Inc. | 0 | 0.0% | 115 | — |
| 53 | Independent Health Association, Inc. | 0 | 0.0% | 115 | — |
| 54 | INLAND EMPIRE HEALTH PLAN | 0 | 0.0% | 1 | — |
| 55 | Kaiser Foundation Health Plan, Inc. | 0 | 0.0% | 11 | — |
| 56 | Kansas Superior Select | 0 | 0.0% | 1 | — |
| 57 | Lifetime Healthcare, Inc. | 0 | 0.0% | 115 | — |
| 58 | Local Initiative Health Authority for LA County | 0 | 0.0% | 1 | — |
| 59 | Longevity Health Founders, LLC | 0 | 0.0% | 2 | — |
| 60 | Louisiana Health Service & Indemnity Company | 0 | 0.0% | 115 | — |
| 61 | Martin's Point Health Care, Inc. | 0 | 0.0% | 115 | — |
| 62 | Medica Holding Company | 0 | 0.0% | 109 | -100.0% |
| 63 | MEDICAL MUTUAL OF OHIO | 0 | 0.0% | 115 | — |
| 64 | MHH Healthcare, L.P. | 0 | 0.0% | 5 | — |
| 65 | Molina Healthcare, Inc. | 0 | 0.0% | 10 | — |
| 66 | MVP Health Care, Inc. | 0 | 0.0% | 115 | — |
| 67 | Network Health, Inc. | 0 | 0.0% | 115 | — |
| 68 | PacificSource | 0 | 0.0% | 1 | — |
| 69 | Presbyterian Healthcare Services | 0 | 0.0% | 2 | — |
| 70 | Providence St Joseph Health | 0 | 0.0% | 1 | — |
| 71 | Sanford Health | 0 | 0.0% | 1 | — |
| 72 | SCAN Group | 0 | 0.0% | 8 | — |
| 73 | Sharp Healthcare | 0 | 0.0% | 1 | — |
| 74 | Singh Holdings LLC | 0 | 0.0% | 1 | — |
| 75 | St Francis Health System & St John Health System | 0 | 0.0% | 3 | — |
| 76 | The Health Plan of West Virginia, Inc. | 0 | 0.0% | 115 | — |
| 77 | The Regents of the University of California | 0 | 0.0% | 1 | — |
| 78 | Thomas Jefferson University | 0 | 0.0% | 1 | — |
| 79 | Trinity Health Corporation | 0 | 0.0% | 7 | — |
| 80 | Universal Health Services, Inc. | 0 | 0.0% | 4 | — |
| 81 | UPMC Health System | 0 | 0.0% | 115 | — |
| 82 | USAble Mutual Insurance Company | 0 | 0.0% | 115 | — |
County view
Leading carrier and Advantage enrollment in each Missouri county. Penetration is from CMS Medicare Monthly Enrollment, 2024.
| County | Advantage enrollees | Leading carrier | Leader share | Carriers | Penetration |
|---|---|---|---|---|---|
| St. Louis | 131,014 | UnitedHealth Group, Inc. | 42.6% | 62 | 55.9% |
| Jackson | 77,314 | UnitedHealth Group, Inc. | 39.9% | 59 | 56.0% |
| St. Charles | 53,064 | UnitedHealth Group, Inc. | 43.8% | 54 | 59.2% |
| Greene | 40,300 | UnitedHealth Group, Inc. | 26.6% | 60 | 60.0% |
| Jefferson | 34,049 | UnitedHealth Group, Inc. | 37.7% | 54 | 65.5% |
| St. Louis City | 31,656 | UnitedHealth Group, Inc. | 41.5% | 56 | 63.3% |
| Clay | 23,444 | Humana Inc. | 54.7% | 57 | 48.2% |
| Franklin | 20,190 | UnitedHealth Group, Inc. | 54.6% | 53 | 71.3% |
| Boone | 15,539 | UnitedHealth Group, Inc. | 62.4% | 52 | 48.0% |
| Jasper | 13,419 | UnitedHealth Group, Inc. | 31.4% | 55 | 48.7% |
| Cass | 13,028 | UnitedHealth Group, Inc. | 52.2% | 51 | 54.4% |
| Christian | 12,269 | Humana Inc. | 25.3% | 55 | 59.2% |
| Taney | 9,761 | UnitedHealth Group, Inc. | 29.2% | 55 | 59.6% |
| Cole | 9,552 | UnitedHealth Group, Inc. | 72.2% | 51 | 55.3% |
| St. Francois | 9,456 | UnitedHealth Group, Inc. | 52.3% | 52 | 54.5% |
| Platte | 9,026 | Humana Inc. | 57.3% | 52 | 44.0% |
| Lincoln | 8,123 | UnitedHealth Group, Inc. | 40.8% | 51 | 61.0% |
| Buchanan | 6,995 | UnitedHealth Group, Inc. | 88.4% | 50 | 35.5% |
| Camden | 6,780 | UnitedHealth Group, Inc. | 42.0% | 53 | 46.8% |
| Stone | 6,557 | UnitedHealth Group, Inc. | 30.9% | 53 | 58.3% |
| Warren | 6,192 | UnitedHealth Group, Inc. | 54.1% | 53 | 66.8% |
| Newton | 6,160 | UnitedHealth Group, Inc. | 30.7% | 51 | 45.1% |
| Laclede | 6,159 | Humana Inc. | 37.4% | 52 | 66.7% |
| Cape Girardeau | 6,126 | UnitedHealth Group, Inc. | 69.8% | 51 | 32.5% |
| Webster | 5,963 | UnitedHealth Group, Inc. | 28.1% | 55 | 66.5% |
| Howell | 5,961 | UnitedHealth Group, Inc. | 35.9% | 51 | 51.8% |
| Lawrence | 5,824 | UnitedHealth Group, Inc. | 29.8% | 55 | 63.8% |
| Barry | 5,560 | UnitedHealth Group, Inc. | 30.1% | 52 | 58.2% |
| Callaway | 5,428 | UnitedHealth Group, Inc. | 60.5% | 51 | 52.5% |
| Polk | 4,925 | CVS Health Corporation | 26.5% | 53 | 62.9% |
| Phelps | 4,846 | UnitedHealth Group, Inc. | 72.6% | 53 | 45.9% |
| Pettis | 4,323 | UnitedHealth Group, Inc. | 50.3% | 47 | 44.9% |
| Johnson | 4,250 | UnitedHealth Group, Inc. | 73.3% | 50 | 44.1% |
| Lafayette | 4,031 | UnitedHealth Group, Inc. | 50.3% | 52 | 50.2% |
| Scott | 3,974 | UnitedHealth Group, Inc. | 73.8% | 51 | 40.1% |
| Butler | 3,931 | UnitedHealth Group, Inc. | 66.9% | 50 | 36.6% |
| Crawford | 3,855 | UnitedHealth Group, Inc. | 57.3% | 53 | 62.5% |
| Benton | 3,809 | UnitedHealth Group, Inc. | 53.4% | 52 | 51.3% |
| Washington | 3,776 | UnitedHealth Group, Inc. | 46.1% | 52 | 62.7% |
| Wright | 3,413 | UnitedHealth Group, Inc. | 33.1% | 51 | 62.7% |
| Pulaski | 3,314 | UnitedHealth Group, Inc. | 49.4% | 53 | 40.0% |
| Henry | 3,192 | UnitedHealth Group, Inc. | 76.3% | 53 | 50.9% |
| Dallas | 3,176 | UnitedHealth Group, Inc. | 29.0% | 53 | 66.9% |
| Miller | 3,162 | UnitedHealth Group, Inc. | 52.5% | 51 | 52.2% |
| Stoddard | 3,128 | UnitedHealth Group, Inc. | 65.9% | 51 | 41.0% |
| Morgan | 3,089 | UnitedHealth Group, Inc. | 45.0% | 50 | 49.3% |
| Texas | 3,061 | UnitedHealth Group, Inc. | 62.5% | 51 | 43.8% |
| Dunklin | 3,053 | UnitedHealth Group, Inc. | 72.6% | 49 | 42.3% |
| Ste. Genevieve | 2,765 | UnitedHealth Group, Inc. | 81.7% | 52 | 54.8% |
| McDonald | 2,659 | UnitedHealth Group, Inc. | 30.2% | 49 | 55.9% |
| Ray | 2,616 | Humana Inc. | 39.6% | 51 | 51.2% |
| Gasconade | 2,501 | UnitedHealth Group, Inc. | 65.5% | 51 | 56.0% |
| Cedar | 2,366 | UnitedHealth Group, Inc. | 35.0% | 51 | 57.1% |
| Audrain | 2,364 | UnitedHealth Group, Inc. | 68.2% | 49 | 40.1% |
| Marion | 2,339 | UnitedHealth Group, Inc. | 86.5% | 52 | 33.8% |
| Randolph | 2,247 | UnitedHealth Group, Inc. | 73.5% | 49 | 40.3% |
| Vernon | 2,232 | UnitedHealth Group, Inc. | 48.4% | 51 | 49.5% |
| Saline | 2,169 | UnitedHealth Group, Inc. | 61.7% | 48 | 44.0% |
| Douglas | 2,058 | Humana Inc. | 28.8% | 54 | 69.6% |
| Clinton | 2,035 | UnitedHealth Group, Inc. | 66.6% | 50 | 42.7% |
| Bates | 2,001 | UnitedHealth Group, Inc. | 55.5% | 50 | 52.4% |
| Cooper | 1,912 | UnitedHealth Group, Inc. | 56.3% | 49 | 46.5% |
| Hickory | 1,897 | UnitedHealth Group, Inc. | 32.4% | 53 | 62.4% |
| Wayne | 1,833 | UnitedHealth Group, Inc. | 70.4% | 48 | 50.6% |
| Dent | 1,786 | UnitedHealth Group, Inc. | 72.8% | 50 | 41.9% |
| Pemiscot | 1,695 | UnitedHealth Group, Inc. | 75.8% | 47 | 48.9% |
| Madison | 1,688 | UnitedHealth Group, Inc. | 65.2% | 49 | 48.6% |
| Pike | 1,621 | UnitedHealth Group, Inc. | 61.1% | 51 | 41.0% |
| Moniteau | 1,616 | UnitedHealth Group, Inc. | 61.1% | 49 | 51.8% |
| Ozark | 1,609 | Humana Inc. | 42.8% | 50 | 54.1% |
| New Madrid | 1,565 | UnitedHealth Group, Inc. | 78.3% | 48 | 40.0% |
| Montgomery | 1,549 | UnitedHealth Group, Inc. | 61.8% | 52 | 50.2% |
| Osage | 1,466 | UnitedHealth Group, Inc. | 74.7% | 50 | 51.4% |
| Perry | 1,440 | UnitedHealth Group, Inc. | 61.0% | 49 | 31.2% |
| St. Clair | 1,375 | UnitedHealth Group, Inc. | 50.0% | 48 | 52.9% |
| Barton | 1,373 | UnitedHealth Group, Inc. | 31.8% | 49 | 46.3% |
| Oregon | 1,371 | UnitedHealth Group, Inc. | 43.1% | 49 | 49.3% |
| Iron | 1,339 | UnitedHealth Group, Inc. | 57.1% | 51 | 44.8% |
| Dade | 1,282 | CVS Health Corporation | 27.1% | 52 | 61.4% |
| Ripley | 1,272 | UnitedHealth Group, Inc. | 65.0% | 49 | 39.0% |
| Adair | 1,241 | UnitedHealth Group, Inc. | 74.7% | 47 | 26.3% |
| Macon | 1,236 | UnitedHealth Group, Inc. | 76.1% | 47 | 30.7% |
| Bollinger | 1,208 | UnitedHealth Group, Inc. | 69.8% | 50 | 42.6% |
| Livingston | 1,134 | UnitedHealth Group, Inc. | 75.8% | 50 | 28.8% |
| Mississippi | 1,108 | UnitedHealth Group, Inc. | 79.2% | 49 | 38.9% |
| Shannon | 1,078 | UnitedHealth Group, Inc. | 44.5% | 49 | 54.6% |
| Andrew | 1,028 | UnitedHealth Group, Inc. | 80.0% | 48 | 26.4% |
| Howard | 1,016 | UnitedHealth Group, Inc. | 62.6% | 50 | 44.6% |
| Maries | 958 | UnitedHealth Group, Inc. | 60.5% | 52 | 47.8% |
| Linn | 891 | UnitedHealth Group, Inc. | 83.1% | 48 | 29.1% |
| Carroll | 859 | UnitedHealth Group, Inc. | 50.5% | 48 | 37.6% |
| Caldwell | 825 | UnitedHealth Group, Inc. | 77.3% | 49 | 40.4% |
| Nodaway | 824 | UnitedHealth Group, Inc. | 91.5% | 47 | 19.1% |
| Ralls | 803 | UnitedHealth Group, Inc. | 92.2% | 48 | 32.4% |
| Monroe | 744 | UnitedHealth Group, Inc. | 86.0% | 47 | 34.3% |
| Reynolds | 712 | UnitedHealth Group, Inc. | 58.8% | 50 | 45.2% |
| Carter | 668 | UnitedHealth Group, Inc. | 59.4% | 48 | 41.9% |
| DeKalb | 665 | UnitedHealth Group, Inc. | 89.3% | 49 | 33.2% |
| Grundy | 661 | UnitedHealth Group, Inc. | 91.2% | 47 | 26.3% |
| Lewis | 650 | UnitedHealth Group, Inc. | 85.7% | 47 | 29.2% |
| Daviess | 509 | UnitedHealth Group, Inc. | 94.5% | 48 | 33.1% |
| Harrison | 500 | UnitedHealth Group, Inc. | 88.6% | 47 | 25.8% |
| Chariton | 436 | UnitedHealth Group, Inc. | 90.6% | 49 | 26.5% |
| Shelby | 350 | UnitedHealth Group, Inc. | 85.4% | 47 | 26.0% |
| Sullivan | 342 | UnitedHealth Group, Inc. | 86.3% | 48 | 28.0% |
| Clark | 304 | UnitedHealth Group, Inc. | 100.0% | 48 | 24.7% |
| Gentry | 279 | UnitedHealth Group, Inc. | 95.0% | 48 | 23.6% |
| Putnam | 253 | UnitedHealth Group, Inc. | 92.9% | 47 | 25.9% |
| Schuyler | 222 | UnitedHealth Group, Inc. | 86.5% | 47 | 29.3% |
| Holt | 221 | UnitedHealth Group, Inc. | 94.1% | 48 | 24.9% |
| Atchison | 186 | UnitedHealth Group, Inc. | 93.0% | 48 | 18.1% |
| Mercer | 176 | UnitedHealth Group, Inc. | 100.0% | 47 | 31.3% |
| Knox | 144 | UnitedHealth Group, Inc. | 81.9% | 47 | 22.7% |
| Scotland | 129 | UnitedHealth Group, Inc. | 100.0% | 48 | 20.4% |
| Worth | 76 | UnitedHealth Group, Inc. | 100.0% | 48 | 26.9% |
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.
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).