Free tool · public CMS data
Iowa Medicare Advantage market share
In September 2026, 244,864 Iowa Medicare beneficiaries were enrolled in a Medicare Advantage plan across 74 parent carriers and 99 counties, led by CVS Health Corporation with 32.6% of counted enrollment.
Data month
September 2026
Advantage enrollees
244,864
-0.1% vs September 2025
Parent carriers
74
Advantage penetration
37.1%
CMS Medicare Monthly Enrollment, 2024
Carriers in Iowa
CMS Monthly Enrollment by Contract/Plan/State/County (CPSC) · September 2026
| # | Parent organisation | Enrollees | Share | Counties | vs September 2025 |
|---|---|---|---|---|---|
| 1 | CVS Health Corporation | 79,731 | 32.6% | 99 | +23.6% |
| 2 | UnitedHealth Group, Inc. | 69,688 | 28.5% | 99 | -33.9% |
| 3 | Humana Inc. | 35,137 | 14.3% | 99 | +33.5% |
| 4 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 33,082 | 13.5% | 99 | -0.8% |
| 5 | Centene Corporation | 12,400 | 5.1% | 85 | +280.4% |
| 6 | Trinity Health Corporation | 7,810 | 3.2% | 67 | +125.1% |
| 7 | Elevance Health, Inc. | 3,734 | 1.5% | 99 | -32.9% |
| 8 | Mitchell Family Office | 1,390 | 0.6% | 87 | +23.2% |
| 9 | Molina Healthcare, Inc. | 827 | 0.3% | 89 | — |
| 10 | Devoted Health, Inc. | 301 | 0.1% | 12 | — |
| 11 | University of Wisconsin Hospitals and Clincs Autho | 209 | 0.1% | 4 | -20.2% |
| 12 | Medica Holding Company | 184 | 0.1% | 71 | +11.5% |
| 13 | Sanford Health | 177 | 0.1% | 13 | +176.6% |
| 14 | Highmark Health | 152 | 0.1% | 99 | +6.3% |
| 15 | Health Care Service Corporation | 42 | 0.0% | 99 | — |
| 16 | Alignment Healthcare USA, LLC | 0 | 0.0% | 99 | — |
| 17 | AllCare Health, Inc. | 0 | 0.0% | 1 | — |
| 18 | Allina Health and Aetna Insurance Holding Company | 0 | 0.0% | 99 | — |
| 19 | Athena Healthcare Holdings, LLC | 0 | 0.0% | 1 | — |
| 20 | Aultman Health Foundation | 0 | 0.0% | 99 | — |
| 21 | Aware Integrated, Inc. | 0 | 0.0% | 99 | — |
| 22 | Baystate Health, Inc. | 0 | 0.0% | 99 | — |
| 23 | Blue Cross & Blue Shield of Rhode Island | 0 | 0.0% | 99 | — |
| 24 | Blue Cross and Blue Shield of Massachusetts, Inc. | 0 | 0.0% | 99 | — |
| 25 | Blue Cross Blue Shield of Arizona | 0 | 0.0% | 3 | — |
| 26 | Blue Cross Blue Shield of Kansas | 0 | 0.0% | 99 | — |
| 27 | Blue Cross Blue Shield of Nebraska | 0 | 0.0% | 99 | — |
| 28 | BlueCross BlueShield of Alabama | 0 | 0.0% | 99 | — |
| 29 | BlueCross BlueShield of South Carolina (BCBSSC) | 0 | 0.0% | 99 | — |
| 30 | BlueCross BlueShield of Tennessee | 0 | 0.0% | 99 | — |
| 31 | California Physicians' Service | 0 | 0.0% | 99 | — |
| 32 | Cambia Health Solutions, Inc. | 0 | 0.0% | 99 | — |
| 33 | CAPITAL BLUE CROSS | 0 | 0.0% | 99 | — |
| 34 | CareFirst, Inc. | 0 | 0.0% | 99 | — |
| 35 | CareOregon, Inc. | 0 | 0.0% | 2 | — |
| 36 | CareSource | 0 | 0.0% | 1 | — |
| 37 | Community Health Plan of Washington | 0 | 0.0% | 1 | — |
| 38 | Corewell Health | 0 | 0.0% | 99 | — |
| 39 | CuraCor Solutions Corp. | 0 | 0.0% | 99 | — |
| 40 | EmblemHealth, Inc. | 0 | 0.0% | 99 | — |
| 41 | Fallon Community Health Plan, Inc. | 0 | 0.0% | 99 | — |
| 42 | Fenyx Health Holdings, Inc. | 0 | 0.0% | 99 | — |
| 43 | General Catalyst Group Management Holdings LP | 0 | 0.0% | 99 | — |
| 44 | Guidewell Mutual Holding Corporation | 0 | 0.0% | 99 | — |
| 45 | Hawaii Medical Service Association | 0 | 0.0% | 99 | — |
| 46 | Healthfirst, Inc. | 0 | 0.0% | 99 | — |
| 47 | HealthPartners, Inc. | 0 | 0.0% | 99 | — |
| 48 | Henry Ford Health System | 0 | 0.0% | 99 | — |
| 49 | Horizon Mutual Holdings, Inc | 0 | 0.0% | 99 | — |
| 50 | Imperial Health Plan of California | 0 | 0.0% | 1 | — |
| 51 | Independence Health Group, Inc. | 0 | 0.0% | 99 | — |
| 52 | Independent Health Association, Inc. | 0 | 0.0% | 99 | — |
| 53 | Intermountain Health Care, Inc. | 0 | 0.0% | 1 | — |
| 54 | Johns Hopkins Healthcare LLC | 0 | 0.0% | 1 | — |
| 55 | Kaiser Foundation Health Plan, Inc. | 0 | 0.0% | 10 | — |
| 56 | Lifetime Healthcare, Inc. | 0 | 0.0% | 99 | — |
| 57 | Longevity Health Founders, LLC | 0 | 0.0% | 2 | — |
| 58 | Louisiana Health Service & Indemnity Company | 0 | 0.0% | 99 | — |
| 59 | Martin's Point Health Care, Inc. | 0 | 0.0% | 99 | — |
| 60 | MEDICAL MUTUAL OF OHIO | 0 | 0.0% | 99 | — |
| 61 | MVP Health Care, Inc. | 0 | 0.0% | 99 | — |
| 62 | NEIGHBORHOOD HEALTH PLAN OF RHODE ISLAND | 0 | 0.0% | 1 | — |
| 63 | Network Health, Inc. | 0 | 0.0% | 99 | — |
| 64 | PacificSource | 0 | 0.0% | 2 | — |
| 65 | Presbyterian Healthcare Services | 0 | 0.0% | 3 | — |
| 66 | Providence St Joseph Health | 0 | 0.0% | 1 | — |
| 67 | SCAN Group | 0 | 0.0% | 3 | — |
| 68 | Sharp Healthcare | 0 | 0.0% | 1 | — |
| 69 | The Health Plan of West Virginia, Inc. | 0 | 0.0% | 99 | — |
| 70 | Thomas Jefferson University | 0 | 0.0% | 1 | — |
| 71 | Universal Health Services, Inc. | 0 | 0.0% | 2 | — |
| 72 | UPMC Health System | 0 | 0.0% | 99 | — |
| 73 | USAble Mutual Insurance Company | 0 | 0.0% | 99 | — |
| 74 | Zing Health Consolidator, Inc | 0 | 0.0% | 1 | — |
County view
Leading carrier and Advantage enrollment in each Iowa county. Penetration is from CMS Medicare Monthly Enrollment, 2024.
| County | Advantage enrollees | Leading carrier | Leader share | Carriers | Penetration |
|---|---|---|---|---|---|
| Polk | 40,249 | UnitedHealth Group, Inc. | 37.6% | 60 | 43.2% |
| Linn | 22,540 | CVS Health Corporation | 43.3% | 55 | 47.1% |
| Scott | 18,006 | CVS Health Corporation | 43.8% | 53 | 47.0% |
| Black Hawk | 14,169 | UnitedHealth Group, Inc. | 46.6% | 53 | 49.8% |
| Pottawattamie | 9,791 | UnitedHealth Group, Inc. | 45.2% | 52 | 44.6% |
| Woodbury | 8,935 | CVS Health Corporation | 54.1% | 55 | 44.9% |
| Johnson | 8,388 | CVS Health Corporation | 37.2% | 53 | 33.7% |
| Dallas | 6,325 | CVS Health Corporation | 36.3% | 51 | 37.4% |
| Clinton | 4,879 | CVS Health Corporation | 37.9% | 52 | 42.2% |
| Warren | 4,827 | UnitedHealth Group, Inc. | 36.8% | 51 | 41.6% |
| Story | 4,257 | UnitedHealth Group, Inc. | 46.3% | 50 | 27.1% |
| Dubuque | 3,849 | UnitedHealth Group, Inc. | 53.5% | 53 | 59.4% |
| Jasper | 3,770 | UnitedHealth Group, Inc. | 34.2% | 51 | 40.3% |
| Marshall | 3,711 | UnitedHealth Group, Inc. | 37.7% | 50 | 40.1% |
| Muscatine | 3,517 | CVS Health Corporation | 32.9% | 51 | 40.9% |
| Wapello | 3,379 | UnitedHealth Group, Inc. | 34.7% | 51 | 44.8% |
| Cerro Gordo | 3,108 | UnitedHealth Group, Inc. | 27.2% | 50 | 27.2% |
| Des Moines | 3,092 | UnitedHealth Group, Inc. | 32.7% | 51 | 30.7% |
| Webster | 2,817 | CVS Health Corporation | 35.6% | 49 | 33.2% |
| Marion | 2,638 | CVS Health Corporation | 27.2% | 51 | 32.9% |
| Benton | 2,355 | CVS Health Corporation | 40.8% | 52 | 37.5% |
| Jones | 2,201 | CVS Health Corporation | 37.0% | 51 | 42.9% |
| Jefferson | 2,146 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 26.7% | 51 | 44.1% |
| Boone | 2,124 | UnitedHealth Group, Inc. | 26.9% | 51 | 33.6% |
| Lee | 2,049 | Humana Inc. | 33.1% | 51 | 23.0% |
| Buchanan | 1,949 | UnitedHealth Group, Inc. | 33.2% | 51 | 40.2% |
| Bremer | 1,902 | CVS Health Corporation | 41.8% | 52 | 34.0% |
| Mahaska | 1,836 | Humana Inc. | 24.3% | 51 | 37.4% |
| Washington | 1,793 | CVS Health Corporation | 30.2% | 51 | 32.2% |
| Fayette | 1,649 | UnitedHealth Group, Inc. | 34.9% | 53 | 31.3% |
| Cedar | 1,585 | CVS Health Corporation | 40.2% | 51 | 36.3% |
| Tama | 1,538 | CVS Health Corporation | 39.9% | 51 | 37.7% |
| Plymouth | 1,520 | CVS Health Corporation | 55.9% | 52 | 29.6% |
| Madison | 1,468 | UnitedHealth Group, Inc. | 36.5% | 51 | 42.5% |
| Jackson | 1,404 | UnitedHealth Group, Inc. | 38.0% | 51 | 45.8% |
| Appanoose | 1,394 | Trinity Health Corporation | 23.2% | 51 | 41.5% |
| Iowa | 1,374 | CVS Health Corporation | 44.0% | 51 | 32.8% |
| Poweshiek | 1,336 | CVS Health Corporation | 41.1% | 50 | 30.0% |
| Delaware | 1,324 | CVS Health Corporation | 37.5% | 51 | 35.1% |
| Hardin | 1,275 | UnitedHealth Group, Inc. | 26.6% | 51 | 29.2% |
| Henry | 1,264 | UnitedHealth Group, Inc. | 29.7% | 51 | 25.4% |
| Butler | 1,206 | UnitedHealth Group, Inc. | 36.8% | 51 | 31.4% |
| Mills | 1,133 | UnitedHealth Group, Inc. | 36.4% | 51 | 33.3% |
| Clayton | 1,131 | UnitedHealth Group, Inc. | 34.4% | 52 | 34.8% |
| Carroll | 1,066 | CVS Health Corporation | 45.4% | 49 | 21.4% |
| Floyd | 1,065 | UnitedHealth Group, Inc. | 29.2% | 51 | 27.1% |
| Grundy | 1,062 | CVS Health Corporation | 32.7% | 51 | 36.3% |
| Harrison | 1,060 | UnitedHealth Group, Inc. | 30.7% | 52 | 30.2% |
| Page | 1,032 | CVS Health Corporation | 35.0% | 52 | 25.4% |
| Guthrie | 1,003 | CVS Health Corporation | 65.4% | 49 | 35.5% |
| Dickinson | 973 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 54.2% | 49 | 18.7% |
| Monona | 878 | CVS Health Corporation | 42.1% | 49 | 37.8% |
| Cass | 853 | UnitedHealth Group, Inc. | 39.5% | 50 | 24.4% |
| Keokuk | 853 | UnitedHealth Group, Inc. | 25.2% | 51 | 33.2% |
| Hamilton | 841 | CVS Health Corporation | 30.1% | 51 | 24.6% |
| Greene | 833 | CVS Health Corporation | 46.8% | 50 | 34.7% |
| Allamakee | 811 | CVS Health Corporation | 40.2% | 49 | 26.9% |
| Clarke | 811 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 51.7% | 52 | 42.6% |
| Union | 809 | CVS Health Corporation | 45.5% | 50 | 29.7% |
| Montgomery | 801 | CVS Health Corporation | 29.2% | 52 | 28.7% |
| Crawford | 799 | CVS Health Corporation | 35.3% | 48 | 23.9% |
| Louisa | 789 | Humana Inc. | 27.6% | 51 | 35.4% |
| Buena Vista | 758 | Humana Inc. | 30.7% | 50 | 20.4% |
| Winneshiek | 748 | CVS Health Corporation | 47.3% | 50 | 20.4% |
| Lucas | 740 | CVS Health Corporation | 36.8% | 50 | 34.4% |
| Clay | 730 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 36.3% | 49 | 18.5% |
| Shelby | 704 | CVS Health Corporation | 45.3% | 51 | 23.4% |
| Chickasaw | 664 | CVS Health Corporation | 39.6% | 51 | 25.5% |
| Wright | 661 | CVS Health Corporation | 33.1% | 51 | 23.0% |
| Cherokee | 627 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 33.5% | 51 | 20.4% |
| Calhoun | 618 | CVS Health Corporation | 39.0% | 49 | 23.8% |
| Sioux | 614 | CVS Health Corporation | 44.6% | 50 | 17.4% |
| Kossuth | 608 | UnitedHealth Group, Inc. | 29.4% | 50 | 17.9% |
| Decatur | 593 | CVS Health Corporation | 31.0% | 50 | 33.4% |
| Van Buren | 579 | CVS Health Corporation | 39.4% | 49 | 34.3% |
| Monroe | 569 | UnitedHealth Group, Inc. | 25.1% | 51 | 34.4% |
| O'Brien | 544 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 36.6% | 49 | 16.5% |
| Winnebago | 531 | Trinity Health Corporation | 26.4% | 49 | 22.5% |
| Davis | 521 | CVS Health Corporation | 41.8% | 49 | 32.0% |
| Wayne | 510 | CVS Health Corporation | 24.1% | 51 | 34.6% |
| Fremont | 447 | CVS Health Corporation | 45.6% | 51 | 26.1% |
| Humboldt | 446 | UnitedHealth Group, Inc. | 35.9% | 49 | 20.5% |
| Pocahontas | 417 | CVS Health Corporation | 32.4% | 50 | 23.7% |
| Adair | 415 | CVS Health Corporation | 52.5% | 50 | 26.9% |
| Howard | 366 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 62.8% | 48 | 17.0% |
| Emmet | 365 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 40.3% | 49 | 18.0% |
| Sac | 365 | CVS Health Corporation | 38.9% | 49 | 15.5% |
| Hancock | 360 | UnitedHealth Group, Inc. | 27.5% | 50 | 19.0% |
| Franklin | 357 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 31.9% | 51 | 19.7% |
| Mitchell | 346 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 81.2% | 49 | 17.6% |
| Worth | 343 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 27.7% | 49 | 25.3% |
| Ida | 321 | CVS Health Corporation | 49.8% | 50 | 21.6% |
| Palo Alto | 305 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 43.6% | 49 | 15.8% |
| Audubon | 256 | CVS Health Corporation | 37.9% | 49 | 18.7% |
| Lyon | 252 | CVS Health Corporation | 63.5% | 49 | 21.7% |
| Taylor | 232 | CVS Health Corporation | 55.2% | 50 | 15.6% |
| Ringgold | 197 | CVS Health Corporation | 38.1% | 51 | 20.7% |
| Osceola | 134 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 64.2% | 50 | 16.7% |
| Adams | 79 | CVS Health Corporation | 36.7% | 51 | 15.0% |
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).