Delaware Medicare Advantage market share
In September 2026, 83,735 Delaware Medicare beneficiaries were enrolled in a Medicare Advantage plan across 67 parent carriers and 3 counties, led by UnitedHealth Group, Inc. with 41.1% of counted enrollment.
Data month
September 2026
Advantage enrollees
83,735
+2.7% vs September 2025
Parent carriers
67
Advantage penetration
31.9%
CMS Medicare Monthly Enrollment, 2024
Carriers in Delaware
CMS Monthly Enrollment by Contract/Plan/State/County (CPSC) · September 2026
| # | Parent organisation | Enrollees | Share | Counties | vs September 2025 |
|---|---|---|---|---|---|
| 1 | UnitedHealth Group, Inc. | 34,386 | 41.1% | 3 | +19.3% |
| 2 | CVS Health Corporation | 23,808 | 28.4% | 3 | +9.8% |
| 3 | Highmark Health | 8,609 | 10.3% | 3 | -52.7% |
| 4 | Humana Inc. | 7,628 | 9.1% | 3 | +22.7% |
| 5 | Centene Corporation | 3,887 | 4.6% | 3 | +137.4% |
| 6 | Health Care Service Corporation | 2,156 | 2.6% | 3 | -30.9% |
| 7 | Independence Health Group, Inc. | 1,287 | 1.5% | 3 | +148.9% |
| 8 | Elevance Health, Inc. | 856 | 1.0% | 3 | -8.5% |
| 9 | Devoted Health, Inc. | 655 | 0.8% | 2 | — |
| 10 | CareFirst, Inc. | 392 | 0.5% | 3 | +5.4% |
| 11 | Horizon Mutual Holdings, Inc | 47 | 0.1% | 3 | +261.5% |
| 12 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 24 | 0.0% | 3 | -29.4% |
| 13 | Alignment Healthcare USA, LLC | 0 | 0.0% | 3 | — |
| 14 | Allina Health and Aetna Insurance Holding Company | 0 | 0.0% | 3 | — |
| 15 | Athena Healthcare Holdings, LLC | 0 | 0.0% | 3 | — |
| 16 | Aultman Health Foundation | 0 | 0.0% | 3 | — |
| 17 | Aware Integrated, Inc. | 0 | 0.0% | 3 | — |
| 18 | Baystate Health, Inc. | 0 | 0.0% | 3 | — |
| 19 | Blue Cross & Blue Shield of Rhode Island | 0 | 0.0% | 3 | — |
| 20 | Blue Cross and Blue Shield of Massachusetts, Inc. | 0 | 0.0% | 3 | — |
| 21 | Blue Cross Blue Shield of Arizona | 0 | 0.0% | 1 | — |
| 22 | Blue Cross Blue Shield of Kansas | 0 | 0.0% | 3 | — |
| 23 | Blue Cross Blue Shield of Nebraska | 0 | 0.0% | 3 | — |
| 24 | BlueCross BlueShield of Alabama | 0 | 0.0% | 3 | — |
| 25 | BlueCross BlueShield of South Carolina (BCBSSC) | 0 | 0.0% | 3 | — |
| 26 | BlueCross BlueShield of Tennessee | 0 | 0.0% | 3 | — |
| 27 | California Physicians' Service | 0 | 0.0% | 3 | — |
| 28 | Cambia Health Solutions, Inc. | 0 | 0.0% | 3 | — |
| 29 | CAPITAL BLUE CROSS | 0 | 0.0% | 3 | — |
| 30 | CareSource | 0 | 0.0% | 1 | — |
| 31 | Clover Health Holdings, Inc. | 0 | 0.0% | 3 | — |
| 32 | Corewell Health | 0 | 0.0% | 3 | — |
| 33 | CuraCor Solutions Corp. | 0 | 0.0% | 3 | — |
| 34 | Elderplan, Inc. | 0 | 0.0% | 1 | — |
| 35 | EmblemHealth, Inc. | 0 | 0.0% | 3 | — |
| 36 | Fallon Community Health Plan, Inc. | 0 | 0.0% | 3 | — |
| 37 | Fenyx Health Holdings, Inc. | 0 | 0.0% | 3 | — |
| 38 | General Catalyst Group Management Holdings LP | 0 | 0.0% | 3 | — |
| 39 | Gold Kidney Health Plan | 0 | 0.0% | 1 | — |
| 40 | Guidewell Mutual Holding Corporation | 0 | 0.0% | 3 | — |
| 41 | Hawaii Medical Service Association | 0 | 0.0% | 3 | — |
| 42 | Healthfirst, Inc. | 0 | 0.0% | 3 | — |
| 43 | HealthPartners, Inc. | 0 | 0.0% | 3 | — |
| 44 | Henry Ford Health System | 0 | 0.0% | 3 | — |
| 45 | Imperial Health Plan of California | 0 | 0.0% | 1 | — |
| 46 | Independent Health Association, Inc. | 0 | 0.0% | 3 | — |
| 47 | Johns Hopkins Healthcare LLC | 0 | 0.0% | 3 | — |
| 48 | Kaiser Foundation Health Plan, Inc. | 0 | 0.0% | 3 | — |
| 49 | LifeBridge Health, Inc. | 0 | 0.0% | 2 | — |
| 50 | Lifetime Healthcare, Inc. | 0 | 0.0% | 3 | — |
| 51 | Louisiana Health Service & Indemnity Company | 0 | 0.0% | 3 | — |
| 52 | Martin's Point Health Care, Inc. | 0 | 0.0% | 3 | — |
| 53 | Medica Holding Company | 0 | 0.0% | 3 | — |
| 54 | MEDICAL MUTUAL OF OHIO | 0 | 0.0% | 3 | — |
| 55 | MHH Healthcare, L.P. | 0 | 0.0% | 2 | — |
| 56 | MVP Health Care, Inc. | 0 | 0.0% | 3 | — |
| 57 | Network Health, Inc. | 0 | 0.0% | 3 | — |
| 58 | Risant Health, Inc. | 0 | 0.0% | 1 | — |
| 59 | SCAN Group | 0 | 0.0% | 1 | — |
| 60 | The Health Plan of West Virginia, Inc. | 0 | 0.0% | 3 | — |
| 61 | Thomas Jefferson University | 0 | 0.0% | 3 | — |
| 62 | Trinity Health Corporation | 0 | 0.0% | 1 | — |
| 63 | UNICO Services, Inc. | 0 | 0.0% | 1 | — |
| 64 | Universal Health Services, Inc. | 0 | 0.0% | 1 | — |
| 65 | UPMC Health System | 0 | 0.0% | 3 | — |
| 66 | USAble Mutual Insurance Company | 0 | 0.0% | 3 | — |
| 67 | Visiting Nurse Service of New York | 0 | 0.0% | 1 | — |
County view
Leading carrier and Advantage enrollment in each Delaware county. Penetration is from CMS Medicare Monthly Enrollment, 2024.
| County | Advantage enrollees | Leading carrier | Leader share | Carriers | Penetration |
|---|---|---|---|---|---|
| New Castle | 39,337 | UnitedHealth Group, Inc. | 34.6% | 59 | 33.1% |
| Sussex | 29,190 | UnitedHealth Group, Inc. | 47.1% | 58 | 29.8% |
| Kent | 15,208 | UnitedHealth Group, Inc. | 46.2% | 59 | 33.2% |
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).