MA Enrollment Explorer / States / Delaware
Medicare Advantage in Delaware: enrollment, penetration and market share
85,047 people in Delaware were enrolled in Medicare Advantage in October 2026. 32.6% of the state's 260,862 eligible Medicare beneficiaries are in Medicare Advantage, −0.1 pts since October 2025. UnitedHealth Group, Inc. is the largest parent organization with 41% of reported enrollment; 15 parent organizations have 11 or more members, and the market's HHI is 2,682 (highly concentrated). Through the 2026 Annual Election Period (December to February), reported MA enrollment in Delaware changed by −338 (−0.4%).
32.6%MA penetration, October 2026
85KMA enrollees
15parent organizations (11+ members)
2,682HHI, highly concentrated
Parent organizations in Delaware
| Parent organization | Members | Change | Share | Share change |
|---|---|---|---|---|
| UnitedHealth Group, Inc. | 34,495 | +5,547 | 40.8% | +5.6 pts |
| CVS Health Corporation | 23,935 | +2,090 | 28.3% | +1.8 pts |
| Highmark Health | 8,664 | −9,586 | 10.2% | −11.9 pts |
| Humana Inc. | 7,700 | +1,430 | 9.1% | +1.5 pts |
| Centene Corporation | 3,898 | +2,254 | 4.6% | +2.6 pts |
| Health Care Service Corporation | 2,187 | −962 | 2.6% | −1.2 pts |
| Independence Health Group, Inc. | 1,332 | +794 | 1.6% | +0.9 pts |
| Elevance Health, Inc. | 855 | −87 | 1.0% | −0.1 pts |
| Devoted Health, Inc. | 665 | new | 0.8% | +0.8 pts |
| CareFirst, Inc. | 425 | +49 | 0.5% | +0.05 pts |
| Trinity Health Corporation | 290 | −4 | 0.3% | −0.01 pts |
| Milford Wellness Village PACE, LLC | 71 | +8 | under 0.1% | +0.01 pts |
| Horizon Mutual Holdings, Inc | 53 | +15 | under 0.1% | +0.02 pts |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 30 | −8 | under 0.1% | −0.01 pts |
| EmblemHealth, Inc. | 11 | 0 | under 0.1% | −0.00 pts |
Change and share change are since October 2025. Shares are of reported enrollment in the CMS State/County/Contract file.
Counties
| County | MA enrollees | Penetration | Leading parent |
|---|---|---|---|
| New Castle County | 40,011 | 33.7% | UnitedHealth Group, Inc. 34% |
| Sussex County | 29,540 | 30.1% | UnitedHealth Group, Inc. 47% |
| Kent County | 15,496 | 35.1% | UnitedHealth Group, Inc. 46% |