Free tool · public CMS data
Ohio Medicare Advantage market share
In September 2026, 1,476,991 Ohio Medicare beneficiaries were enrolled in a Medicare Advantage plan across 96 parent carriers and 88 counties, led by UnitedHealth Group, Inc. with 23.1% of counted enrollment.
Data month
September 2026
Advantage enrollees
1,476,991
+5.5% vs September 2025
Parent carriers
96
Advantage penetration
55.8%
CMS Medicare Monthly Enrollment, 2024
Carriers in Ohio
CMS Monthly Enrollment by Contract/Plan/State/County (CPSC) · September 2026
| # | Parent organisation | Enrollees | Share | Counties | vs September 2025 |
|---|---|---|---|---|---|
| 1 | UnitedHealth Group, Inc. | 341,011 | 23.1% | 88 | +1.3% |
| 2 | CVS Health Corporation | 325,209 | 22.0% | 88 | +17.0% |
| 3 | Elevance Health, Inc. | 228,386 | 15.5% | 88 | -30.3% |
| 4 | Humana Inc. | 218,622 | 14.8% | 88 | +12.4% |
| 5 | MEDICAL MUTUAL OF OHIO | 86,864 | 5.9% | 88 | -13.3% |
| 6 | Devoted Health, Inc. | 65,107 | 4.4% | 79 | +88.0% |
| 7 | Trinity Health Corporation | 55,435 | 3.8% | 74 | +36.6% |
| 8 | CareSource | 36,121 | 2.4% | 88 | +346.9% |
| 9 | General Catalyst Group Management Holdings LP | 34,321 | 2.3% | 88 | — |
| 10 | Health Care Service Corporation | 18,571 | 1.3% | 88 | +129.8% |
| 11 | Molina Healthcare, Inc. | 14,869 | 1.0% | 88 | +1418.8% |
| 12 | Centene Corporation | 14,849 | 1.0% | 88 | +20.7% |
| 13 | Aultman Health Foundation | 14,339 | 1.0% | 88 | +0.7% |
| 14 | Highmark Health | 7,594 | 0.5% | 88 | +24.7% |
| 15 | The Health Plan of West Virginia, Inc. | 5,916 | 0.4% | 88 | +43.7% |
| 16 | Zing Health Consolidator, Inc | 2,405 | 0.2% | 16 | +156.4% |
| 17 | The Schroer Group, Inc. | 2,293 | 0.2% | 80 | +17.5% |
| 18 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 2,155 | 0.1% | 88 | -1.3% |
| 19 | SNP Holdings, LLC | 1,461 | 0.1% | 16 | +3.0% |
| 20 | Perennial Consortium, LLC | 1,387 | 0.1% | 38 | +135.5% |
| 21 | UPMC Health System | 76 | 0.0% | 88 | +1.3% |
| 22 | Alignment Healthcare USA, LLC | 0 | 0.0% | 88 | — |
| 23 | Allina Health and Aetna Insurance Holding Company | 0 | 0.0% | 88 | — |
| 24 | AlohaCare | 0 | 0.0% | 1 | — |
| 25 | Athena Healthcare Holdings, LLC | 0 | 0.0% | 3 | — |
| 26 | ATRIO Health Plans | 0 | 0.0% | 1 | — |
| 27 | Aware Integrated, Inc. | 0 | 0.0% | 88 | — |
| 28 | Banner Health | 0 | 0.0% | 1 | — |
| 29 | BayCare Health System, Inc. | 0 | 0.0% | 1 | — |
| 30 | Baystate Health, Inc. | 0 | 0.0% | 88 | — |
| 31 | Blue Cross & Blue Shield of Rhode Island | 0 | 0.0% | 88 | — |
| 32 | Blue Cross and Blue Shield of Massachusetts, Inc. | 0 | 0.0% | 88 | — |
| 33 | Blue Cross Blue Shield of Arizona | 0 | 0.0% | 1 | — |
| 34 | Blue Cross Blue Shield of Kansas | 0 | 0.0% | 88 | — |
| 35 | Blue Cross Blue Shield of Nebraska | 0 | 0.0% | 88 | — |
| 36 | BlueCross BlueShield of Alabama | 0 | 0.0% | 88 | — |
| 37 | BlueCross BlueShield of South Carolina (BCBSSC) | 0 | 0.0% | 88 | — |
| 38 | BlueCross BlueShield of Tennessee | 0 | 0.0% | 88 | — |
| 39 | California Physicians' Service | 0 | 0.0% | 88 | — |
| 40 | Cambia Health Solutions, Inc. | 0 | 0.0% | 88 | — |
| 41 | CAPITAL BLUE CROSS | 0 | 0.0% | 88 | — |
| 42 | CareFirst, Inc. | 0 | 0.0% | 88 | — |
| 43 | CareOregon, Inc. | 0 | 0.0% | 1 | — |
| 44 | Clever Care Health Plan, Inc. | 0 | 0.0% | 1 | — |
| 45 | Clover Health Holdings, Inc. | 0 | 0.0% | 1 | — |
| 46 | Community Health Group | 0 | 0.0% | 1 | — |
| 47 | Corewell Health | 0 | 0.0% | 88 | — |
| 48 | CuraCor Solutions Corp. | 0 | 0.0% | 88 | — |
| 49 | Curana Health Holdings, LLC | 0 | 0.0% | 1 | — |
| 50 | DLP Marquette Health Plan, LLC | 0 | 0.0% | 1 | — |
| 51 | Elderplan, Inc. | 0 | 0.0% | 1 | — |
| 52 | EmblemHealth, Inc. | 0 | 0.0% | 88 | — |
| 53 | Eternal Health of Delaware, Inc. | 0 | 0.0% | 1 | — |
| 54 | Fallon Community Health Plan, Inc. | 0 | 0.0% | 88 | — |
| 55 | Fenyx Health Holdings, Inc. | 0 | 0.0% | 88 | — |
| 56 | Gold Kidney Health Plan | 0 | 0.0% | 1 | — |
| 57 | Guidewell Mutual Holding Corporation | 0 | 0.0% | 88 | — |
| 58 | Hamaspik of Rockland County, Inc. | 0 | 0.0% | 1 | — |
| 59 | Hawaii Medical Service Association | 0 | 0.0% | 88 | — |
| 60 | Healthfirst, Inc. | 0 | 0.0% | 88 | — |
| 61 | HealthPartners, Inc. | 0 | 0.0% | 88 | — |
| 62 | Henry Ford Health System | 0 | 0.0% | 88 | — |
| 63 | Horizon Mutual Holdings, Inc | 0 | 0.0% | 88 | — |
| 64 | Independence Health Group, Inc. | 0 | 0.0% | 88 | — |
| 65 | Independent Health Association, Inc. | 0 | 0.0% | 88 | — |
| 66 | Intermountain Health Care, Inc. | 0 | 0.0% | 2 | — |
| 67 | ISNP Holdings, LLC | 0 | 0.0% | 1 | — |
| 68 | Kaiser Foundation Health Plan, Inc. | 0 | 0.0% | 14 | — |
| 69 | Lifetime Healthcare, Inc. | 0 | 0.0% | 88 | — |
| 70 | Local Initiative Health Authority for LA County | 0 | 0.0% | 1 | — |
| 71 | Longevity Health Founders, LLC | 0 | 0.0% | 2 | — |
| 72 | Louisiana Health Service & Indemnity Company | 0 | 0.0% | 88 | — |
| 73 | Lumeris Group Holdings Corporation | 0 | 0.0% | 1 | -100.0% |
| 74 | Martin's Point Health Care, Inc. | 0 | 0.0% | 88 | — |
| 75 | Mass General Brigham Incorporated | 0 | 0.0% | 1 | — |
| 76 | Medica Holding Company | 0 | 0.0% | 88 | — |
| 77 | Mercy Care | 0 | 0.0% | 1 | — |
| 78 | MHH Healthcare, L.P. | 0 | 0.0% | 5 | — |
| 79 | Missouri Healthcare Advisors, LLC | 0 | 0.0% | 1 | — |
| 80 | MVP Health Care, Inc. | 0 | 0.0% | 88 | — |
| 81 | Network Health, Inc. | 0 | 0.0% | 88 | — |
| 82 | Point32Health, Inc. | 0 | 0.0% | 1 | — |
| 83 | Presbyterian Healthcare Services | 0 | 0.0% | 2 | — |
| 84 | Risant Health, Inc. | 0 | 0.0% | 1 | — |
| 85 | Sanford Health | 0 | 0.0% | 2 | — |
| 86 | SANTA CLARA COUNTY HEALTH AUTHORITY | 0 | 0.0% | 1 | — |
| 87 | SCAN Group | 0 | 0.0% | 14 | — |
| 88 | Sentara Health Care (SHC) | 0 | 0.0% | 1 | — |
| 89 | SIHO Holding, Inc. | 0 | 0.0% | 1 | — |
| 90 | St Francis Health System & St John Health System | 0 | 0.0% | 2 | — |
| 91 | The Regents of the University of California | 0 | 0.0% | 1 | — |
| 92 | Thomas Jefferson University | 0 | 0.0% | 3 | — |
| 93 | Ultimate Healthcare Holdings, LLC | 0 | 0.0% | 1 | — |
| 94 | UNICO Services, Inc. | 0 | 0.0% | 1 | — |
| 95 | USAble Mutual Insurance Company | 0 | 0.0% | 88 | — |
| 96 | Verda Healthcare, Inc. | 0 | 0.0% | 1 | — |
County view
Leading carrier and Advantage enrollment in each Ohio county. Penetration is from CMS Medicare Monthly Enrollment, 2024.
| County | Advantage enrollees | Leading carrier | Leader share | Carriers | Penetration |
|---|---|---|---|---|---|
| Cuyahoga | 162,287 | UnitedHealth Group, Inc. | 26.9% | 67 | 57.5% |
| Franklin | 118,357 | CVS Health Corporation | 28.9% | 63 | 56.6% |
| Hamilton | 93,248 | UnitedHealth Group, Inc. | 24.7% | 62 | 56.8% |
| Summit | 81,140 | UnitedHealth Group, Inc. | 23.1% | 58 | 63.3% |
| Montgomery | 73,584 | UnitedHealth Group, Inc. | 29.4% | 60 | 60.6% |
| Stark | 64,883 | UnitedHealth Group, Inc. | 21.2% | 62 | 67.2% |
| Lucas | 55,039 | CVS Health Corporation | 24.8% | 58 | 57.9% |
| Lorain | 45,781 | UnitedHealth Group, Inc. | 25.2% | 58 | 56.7% |
| Butler | 43,140 | UnitedHealth Group, Inc. | 26.4% | 57 | 55.8% |
| Mahoning | 39,203 | UnitedHealth Group, Inc. | 30.1% | 55 | 64.2% |
| Trumbull | 33,948 | UnitedHealth Group, Inc. | 26.3% | 56 | 61.4% |
| Lake | 33,941 | UnitedHealth Group, Inc. | 22.1% | 57 | 53.7% |
| Clermont | 28,547 | Humana Inc. | 25.4% | 56 | 57.9% |
| Warren | 25,553 | UnitedHealth Group, Inc. | 24.2% | 56 | 52.9% |
| Medina | 25,096 | UnitedHealth Group, Inc. | 20.4% | 56 | 55.4% |
| Portage | 23,888 | UnitedHealth Group, Inc. | 21.6% | 56 | 61.7% |
| Licking | 22,449 | CVS Health Corporation | 28.0% | 55 | 55.6% |
| Delaware | 20,452 | CVS Health Corporation | 39.8% | 54 | 47.7% |
| Clark | 19,434 | UnitedHealth Group, Inc. | 36.3% | 56 | 59.8% |
| Fairfield | 19,397 | CVS Health Corporation | 27.0% | 55 | 58.4% |
| Greene | 18,467 | UnitedHealth Group, Inc. | 28.0% | 55 | 49.2% |
| Richland | 16,479 | UnitedHealth Group, Inc. | 31.0% | 53 | 51.6% |
| Columbiana | 16,475 | UnitedHealth Group, Inc. | 24.7% | 53 | 59.9% |
| Wayne | 14,631 | Humana Inc. | 16.8% | 55 | 55.2% |
| Wood | 14,439 | CVS Health Corporation | 33.8% | 55 | 51.1% |
| Miami | 14,264 | Elevance Health, Inc. | 29.2% | 53 | 52.5% |
| Tuscarawas | 14,176 | Elevance Health, Inc. | 27.1% | 55 | 60.6% |
| Ashtabula | 13,722 | UnitedHealth Group, Inc. | 39.8% | 52 | 50.2% |
| Muskingum | 12,354 | CVS Health Corporation | 52.3% | 53 | 55.0% |
| Allen | 12,060 | UnitedHealth Group, Inc. | 25.4% | 54 | 49.4% |
| Geauga | 11,811 | Elevance Health, Inc. | 21.4% | 57 | 48.7% |
| Erie | 10,546 | UnitedHealth Group, Inc. | 30.2% | 54 | 47.8% |
| Ross | 9,845 | Trinity Health Corporation | 25.1% | 54 | 54.7% |
| Belmont | 8,922 | CVS Health Corporation | 32.4% | 53 | 56.8% |
| Marion | 8,855 | CVS Health Corporation | 26.9% | 53 | 55.7% |
| Jefferson | 8,828 | CVS Health Corporation | 37.7% | 53 | 50.8% |
| Scioto | 8,727 | Humana Inc. | 31.2% | 51 | 48.1% |
| Knox | 8,096 | Humana Inc. | 32.3% | 53 | 52.4% |
| Hancock | 7,804 | CVS Health Corporation | 55.0% | 53 | 44.8% |
| Washington | 7,269 | Humana Inc. | 25.7% | 52 | 42.9% |
| Ashland | 7,225 | CVS Health Corporation | 21.9% | 53 | 54.3% |
| Pickaway | 7,184 | Trinity Health Corporation | 21.9% | 54 | 59.9% |
| Lawrence | 7,173 | Humana Inc. | 30.9% | 51 | 47.7% |
| Sandusky | 7,153 | CVS Health Corporation | 27.2% | 53 | 45.5% |
| Huron | 7,000 | CVS Health Corporation | 23.5% | 55 | 46.2% |
| Ottawa | 6,625 | MEDICAL MUTUAL OF OHIO | 26.3% | 55 | 50.4% |
| Brown | 6,514 | Humana Inc. | 23.4% | 53 | 60.5% |
| Highland | 5,735 | UnitedHealth Group, Inc. | 26.0% | 54 | 55.0% |
| Athens | 5,672 | CVS Health Corporation | 36.3% | 52 | 50.4% |
| Union | 5,663 | CVS Health Corporation | 35.3% | 52 | 51.8% |
| Preble | 5,603 | UnitedHealth Group, Inc. | 33.5% | 53 | 53.5% |
| Seneca | 5,572 | CVS Health Corporation | 44.2% | 56 | 38.9% |
| Crawford | 5,552 | CVS Health Corporation | 34.2% | 53 | 47.5% |
| Clinton | 5,529 | Elevance Health, Inc. | 27.5% | 54 | 54.6% |
| Madison | 5,462 | CVS Health Corporation | 25.9% | 54 | 57.9% |
| Darke | 5,259 | UnitedHealth Group, Inc. | 34.2% | 54 | 41.2% |
| Logan | 5,243 | CVS Health Corporation | 31.0% | 53 | 44.7% |
| Fulton | 5,134 | CVS Health Corporation | 29.5% | 54 | 47.0% |
| Guernsey | 5,054 | CVS Health Corporation | 52.0% | 53 | 51.6% |
| Champaign | 4,982 | UnitedHealth Group, Inc. | 33.4% | 53 | 54.1% |
| Defiance | 4,789 | CVS Health Corporation | 41.2% | 53 | 47.9% |
| Perry | 4,682 | Trinity Health Corporation | 25.2% | 53 | 55.0% |
| Coshocton | 4,539 | UnitedHealth Group, Inc. | 37.0% | 53 | 51.6% |
| Carroll | 4,418 | CVS Health Corporation | 23.9% | 52 | 63.8% |
| Morrow | 4,245 | Humana Inc. | 28.8% | 53 | 51.5% |
| Williams | 4,212 | CVS Health Corporation | 40.7% | 52 | 43.1% |
| Auglaize | 4,091 | CVS Health Corporation | 34.3% | 54 | 37.7% |
| Jackson | 4,018 | Humana Inc. | 28.3% | 53 | 50.8% |
| Adams | 3,971 | Elevance Health, Inc. | 28.6% | 53 | 55.0% |
| Shelby | 3,877 | CVS Health Corporation | 30.3% | 54 | 38.0% |
| Gallia | 3,739 | Humana Inc. | 28.6% | 53 | 50.9% |
| Hocking | 3,572 | Elevance Health, Inc. | 20.7% | 53 | 52.3% |
| Fayette | 3,479 | UnitedHealth Group, Inc. | 25.0% | 53 | 53.5% |
| Pike | 3,361 | UnitedHealth Group, Inc. | 28.1% | 54 | 53.7% |
| Hardin | 3,129 | CVS Health Corporation | 33.2% | 53 | 48.1% |
| Van Wert | 3,114 | CVS Health Corporation | 35.9% | 54 | 47.2% |
| Meigs | 3,055 | CVS Health Corporation | 30.2% | 52 | 55.8% |
| Mercer | 3,013 | CVS Health Corporation | 47.4% | 53 | 31.8% |
| Putnam | 2,908 | CVS Health Corporation | 33.0% | 53 | 36.1% |
| Henry | 2,885 | CVS Health Corporation | 50.7% | 54 | 42.2% |
| Holmes | 2,741 | Aultman Health Foundation | 24.2% | 53 | 49.0% |
| Wyandot | 2,339 | CVS Health Corporation | 46.5% | 53 | 41.6% |
| Paulding | 2,027 | CVS Health Corporation | 31.3% | 53 | 47.9% |
| Harrison | 1,996 | CVS Health Corporation | 38.6% | 53 | 56.0% |
| Morgan | 1,871 | CVS Health Corporation | 42.4% | 53 | 57.5% |
| Monroe | 1,799 | Humana Inc. | 23.7% | 52 | 56.9% |
| Vinton | 1,393 | Humana Inc. | 24.2% | 53 | 52.5% |
| Noble | 1,257 | CVS Health Corporation | 44.7% | 53 | 48.7% |
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).