Free tool · public CMS data
Arizona Medicare Advantage market share
In September 2026, 802,868 Arizona Medicare beneficiaries were enrolled in a Medicare Advantage plan across 99 parent carriers and 15 counties, led by UnitedHealth Group, Inc. with 40.6% of counted enrollment.
Data month
September 2026
Advantage enrollees
802,868
+2.7% vs September 2025
Parent carriers
99
Advantage penetration
50.3%
CMS Medicare Monthly Enrollment, 2024
Carriers in Arizona
CMS Monthly Enrollment by Contract/Plan/State/County (CPSC) · September 2026
| # | Parent organisation | Enrollees | Share | Counties | vs September 2025 |
|---|---|---|---|---|---|
| 1 | UnitedHealth Group, Inc. | 325,922 | 40.6% | 15 | -9.9% |
| 2 | Humana Inc. | 176,331 | 22.0% | 15 | +42.3% |
| 3 | Health Care Service Corporation | 76,900 | 9.6% | 15 | +0.4% |
| 4 | Blue Cross Blue Shield of Arizona | 47,344 | 5.9% | 15 | +15.4% |
| 5 | Centene Corporation | 46,664 | 5.8% | 15 | +2.2% |
| 6 | CVS Health Corporation | 38,605 | 4.8% | 15 | -35.1% |
| 7 | Devoted Health, Inc. | 18,961 | 2.4% | 13 | +59.1% |
| 8 | Banner Health | 18,252 | 2.3% | 12 | -26.8% |
| 9 | SCAN Group | 11,516 | 1.4% | 15 | +231.1% |
| 10 | Mercy Care | 10,880 | 1.4% | 15 | +0.2% |
| 11 | Alignment Healthcare USA, LLC | 10,418 | 1.3% | 15 | +74.9% |
| 12 | Elevance Health, Inc. | 8,579 | 1.1% | 15 | -5.9% |
| 13 | Gold Kidney Health Plan | 5,762 | 0.7% | 14 | +126.2% |
| 14 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 2,623 | 0.3% | 15 | -3.8% |
| 15 | Eternal Health of Delaware, Inc. | 2,368 | 0.3% | 6 | +164.6% |
| 16 | California Physicians' Service | 702 | 0.1% | 15 | +6.2% |
| 17 | Molina Healthcare, Inc. | 357 | 0.0% | 10 | +73.3% |
| 18 | Highmark Health | 238 | 0.0% | 15 | -1.2% |
| 19 | Kaiser Foundation Health Plan, Inc. | 128 | 0.0% | 12 | 0.0% |
| 20 | Aware Integrated, Inc. | 87 | 0.0% | 15 | +128.9% |
| 21 | Verda Healthcare, Inc. | 81 | 0.0% | 1 | — |
| 22 | Cambia Health Solutions, Inc. | 63 | 0.0% | 15 | -21.2% |
| 23 | Corewell Health | 31 | 0.0% | 15 | -8.8% |
| 24 | Medica Holding Company | 19 | 0.0% | 15 | -13.6% |
| 25 | CareFirst, Inc. | 14 | 0.0% | 15 | -17.6% |
| 26 | Imperial Health Plan of California | 12 | 0.0% | 8 | — |
| 27 | MVP Health Care, Inc. | 11 | 0.0% | 15 | — |
| 28 | AllCare Health, Inc. | 0 | 0.0% | 1 | — |
| 29 | Allina Health and Aetna Insurance Holding Company | 0 | 0.0% | 15 | — |
| 30 | Astiva Health Holdings Incorporated | 0 | 0.0% | 4 | — |
| 31 | Athena Healthcare Holdings, LLC | 0 | 0.0% | 1 | — |
| 32 | ATRIO Health Plans | 0 | 0.0% | 2 | — |
| 33 | Aultman Health Foundation | 0 | 0.0% | 15 | — |
| 34 | BayCare Health System, Inc. | 0 | 0.0% | 1 | — |
| 35 | Baystate Health, Inc. | 0 | 0.0% | 15 | — |
| 36 | Blue Cross & Blue Shield of Rhode Island | 0 | 0.0% | 15 | — |
| 37 | Blue Cross and Blue Shield of Massachusetts, Inc. | 0 | 0.0% | 15 | — |
| 38 | Blue Cross Blue Shield of Kansas | 0 | 0.0% | 15 | — |
| 39 | Blue Cross Blue Shield of Nebraska | 0 | 0.0% | 15 | — |
| 40 | BlueCross BlueShield of Alabama | 0 | 0.0% | 15 | — |
| 41 | BlueCross BlueShield of South Carolina (BCBSSC) | 0 | 0.0% | 15 | — |
| 42 | BlueCross BlueShield of Tennessee | 0 | 0.0% | 15 | — |
| 43 | CAPITAL BLUE CROSS | 0 | 0.0% | 15 | — |
| 44 | CareSource | 0 | 0.0% | 2 | — |
| 45 | Champion Health Plans-USA, LLC. | 0 | 0.0% | 4 | — |
| 46 | CHRISTUS Health | 0 | 0.0% | 1 | — |
| 47 | Clever Care Health Plan, Inc. | 0 | 0.0% | 1 | — |
| 48 | Clover Health Holdings, Inc. | 0 | 0.0% | 1 | — |
| 49 | Community Health Group | 0 | 0.0% | 3 | — |
| 50 | Community Health Plan of Washington | 0 | 0.0% | 1 | — |
| 51 | CuraCor Solutions Corp. | 0 | 0.0% | 15 | — |
| 52 | DLP Marquette Health Plan, LLC | 0 | 0.0% | 2 | — |
| 53 | EmblemHealth, Inc. | 0 | 0.0% | 15 | — |
| 54 | Fallon Community Health Plan, Inc. | 0 | 0.0% | 15 | — |
| 55 | Fenyx Health Holdings, Inc. | 0 | 0.0% | 15 | — |
| 56 | Gemstone Holdings, Inc. | 0 | 0.0% | 2 | — |
| 57 | General Catalyst Group Management Holdings LP | 0 | 0.0% | 15 | — |
| 58 | Guidewell Mutual Holding Corporation | 0 | 0.0% | 15 | — |
| 59 | Hawaii Medical Service Association | 0 | 0.0% | 15 | — |
| 60 | Healthfirst, Inc. | 0 | 0.0% | 15 | — |
| 61 | HealthPartners, Inc. | 0 | 0.0% | 15 | — |
| 62 | Henry Ford Health System | 0 | 0.0% | 15 | — |
| 63 | Horizon Mutual Holdings, Inc | 0 | 0.0% | 15 | — |
| 64 | Independence Health Group, Inc. | 0 | 0.0% | 15 | — |
| 65 | Independent Health Association, Inc. | 0 | 0.0% | 15 | — |
| 66 | INLAND EMPIRE HEALTH PLAN | 0 | 0.0% | 2 | — |
| 67 | Intermountain Health Care, Inc. | 0 | 0.0% | 6 | — |
| 68 | ISNP Holdings, LLC | 0 | 0.0% | 1 | — |
| 69 | Lifetime Healthcare, Inc. | 0 | 0.0% | 15 | — |
| 70 | Local Initiative Health Authority for LA County | 0 | 0.0% | 4 | — |
| 71 | Longevity Health Founders, LLC | 0 | 0.0% | 1 | — |
| 72 | Louisiana Health Service & Indemnity Company | 0 | 0.0% | 15 | — |
| 73 | Lumeris Group Holdings Corporation | 0 | 0.0% | 2 | — |
| 74 | Martin's Point Health Care, Inc. | 0 | 0.0% | 15 | — |
| 75 | Mass General Brigham Incorporated | 0 | 0.0% | 1 | — |
| 76 | MEDICAL MUTUAL OF OHIO | 0 | 0.0% | 15 | — |
| 77 | MHH Healthcare, L.P. | 0 | 0.0% | 3 | — |
| 78 | Montage Health | 0 | 0.0% | 2 | — |
| 79 | Network Health, Inc. | 0 | 0.0% | 15 | — |
| 80 | Orange County Health Authority | 0 | 0.0% | 2 | — |
| 81 | PacificSource | 0 | 0.0% | 4 | — |
| 82 | Point32Health, Inc. | 0 | 0.0% | 2 | — |
| 83 | Presbyterian Healthcare Services | 0 | 0.0% | 6 | — |
| 84 | Providence St Joseph Health | 0 | 0.0% | 5 | — |
| 85 | Risant Health, Inc. | 0 | 0.0% | 1 | — |
| 86 | Sanford Health | 0 | 0.0% | 3 | — |
| 87 | SANTA CLARA COUNTY HEALTH AUTHORITY | 0 | 0.0% | 1 | — |
| 88 | Sharp Healthcare | 0 | 0.0% | 5 | — |
| 89 | The Health Plan of West Virginia, Inc. | 0 | 0.0% | 15 | — |
| 90 | The Regents of the University of California | 0 | 0.0% | 4 | — |
| 91 | Thomas Jefferson University | 0 | 0.0% | 2 | — |
| 92 | Trinity Health Corporation | 0 | 0.0% | 5 | — |
| 93 | Triton Health Systems, L.L.C. | 0 | 0.0% | 1 | — |
| 94 | Ultimate Healthcare Holdings, LLC | 0 | 0.0% | 1 | — |
| 95 | Universal Health Services, Inc. | 0 | 0.0% | 8 | — |
| 96 | UPMC Health System | 0 | 0.0% | 15 | — |
| 97 | USAble Mutual Insurance Company | 0 | 0.0% | 15 | — |
| 98 | Ventura County Medi-Cal Managed Care Commission | 0 | 0.0% | 1 | — |
| 99 | Zing Health Consolidator, Inc | 0 | 0.0% | 1 | — |
County view
Leading carrier and Advantage enrollment in each Arizona county. Penetration is from CMS Medicare Monthly Enrollment, 2024.
| County | Advantage enrollees | Leading carrier | Leader share | Carriers | Penetration |
|---|---|---|---|---|---|
| Maricopa | 421,625 | UnitedHealth Group, Inc. | 38.6% | 87 | 50.5% |
| Pima | 152,147 | UnitedHealth Group, Inc. | 58.5% | 75 | 55.7% |
| Pinal | 60,151 | UnitedHealth Group, Inc. | 36.7% | 68 | 55.8% |
| Mohave | 41,285 | Humana Inc. | 59.4% | 66 | 50.7% |
| Yavapai | 40,108 | UnitedHealth Group, Inc. | 37.4% | 65 | 41.3% |
| Yuma | 24,632 | Centene Corporation | 34.0% | 64 | 48.5% |
| Cochise | 18,168 | Centene Corporation | 35.3% | 61 | 46.7% |
| Navajo | 10,282 | UnitedHealth Group, Inc. | 39.5% | 56 | 37.3% |
| Santa Cruz | 7,926 | UnitedHealth Group, Inc. | 29.6% | 56 | 64.6% |
| Coconino | 7,784 | UnitedHealth Group, Inc. | 47.5% | 59 | 33.9% |
| Gila | 7,440 | UnitedHealth Group, Inc. | 50.6% | 60 | 40.9% |
| Apache | 4,222 | UnitedHealth Group, Inc. | 39.9% | 55 | 30.3% |
| Graham | 3,567 | UnitedHealth Group, Inc. | 61.0% | 55 | 54.5% |
| La Paz | 2,865 | Humana Inc. | 36.0% | 60 | 45.2% |
| Greenlee | 666 | UnitedHealth Group, Inc. | 56.6% | 54 | 49.5% |
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).