MA Enrollment Explorer / States / Vermont
Medicare Advantage in Vermont: enrollment, penetration and market share
20,841 people in Vermont were enrolled in Medicare Advantage in October 2026. 12.1% of the state's 171,554 eligible Medicare beneficiaries are in Medicare Advantage, −18.6 pts since October 2025. Humana Inc. is the largest parent organization with 40% of reported enrollment; 7 parent organizations have 11 or more members, and the market's HHI is 3,004 (highly concentrated). Through the 2026 Annual Election Period (December to February), reported MA enrollment in Vermont changed by −30,721 (−60.2%).
12.1%MA penetration, October 2026
21KMA enrollees
7parent organizations (11+ members)
3,004HHI, highly concentrated
Parent organizations in Vermont
| Parent organization | Members | Change | Share | Share change |
|---|---|---|---|---|
| Humana Inc. | 8,084 | +5,081 | 39.7% | +33.8 pts |
| Health Care Service Corporation | 6,371 | +5,649 | 31.3% | +29.9 pts |
| UnitedHealth Group, Inc. | 4,039 | −8,064 | 19.8% | −3.8 pts |
| CVS Health Corporation | 1,524 | +119 | 7.5% | +4.7 pts |
| Elevance Health, Inc. | 330 | −11 | 1.6% | +1.0 pts |
| Highmark Health | 14 | −6 | under 0.1% | +0.03 pts |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 11 | −33,714 | under 0.1% | −65.7 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 |
|---|---|---|---|
| Chittenden County | 3,970 | 10.8% | UnitedHealth Group, Inc. 56% |
| Windham County | 2,800 | 20.9% | Humana Inc. 75% |
| Bennington County | 2,527 | 22.8% | Humana Inc. 79% |
| Windsor County | 2,496 | 14.1% | Humana Inc. 59% |
| Caledonia County | 1,751 | 20.7% | Humana Inc. 65% |
| Orange County | 1,366 | 16.4% | Humana Inc. 66% |
| Rutland County | 1,265 | 6.7% | Health Care Service Corporation 71% |
| Washington County | 1,097 | 6.9% | Health Care Service Corporation 58% |
| Franklin County | 1,059 | 8.9% | UnitedHealth Group, Inc. 50% |
| Addison County | 715 | 7.1% | Health Care Service Corporation 64% |
| Essex County | 554 | 26.2% | Humana Inc. 80% |
| Orleans County | 497 | 6.0% | Health Care Service Corporation 65% |
| Lamoille County | 481 | 7.7% | Health Care Service Corporation 59% |
| Grand Isle County | 263 | 10.4% | UnitedHealth Group, Inc. 44% |