MA Enrollment Explorer / States / Connecticut
Medicare Advantage in Connecticut: enrollment, penetration and market share
446,620 people in Connecticut were enrolled in Medicare Advantage in October 2026. CMS has not published Connecticut county penetration in recent months, so this page shows enrollment and market share only. CVS Health Corporation is the largest parent organization with 43% of reported enrollment; 16 parent organizations have 11 or more members, and the market's HHI is 2,770 (highly concentrated). Through the 2026 Annual Election Period (December to February), reported MA enrollment in Connecticut changed by −7,425 (−1.7%).
n/aMA penetration, October 2026
447KMA enrollees
16parent organizations (11+ members)
2,770HHI, highly concentrated
Parent organizations in Connecticut
| Parent organization | Members | Change | Share | Share change |
|---|---|---|---|---|
| CVS Health Corporation | 193,276 | +61,125 | 43.3% | +13.3 pts |
| UnitedHealth Group, Inc. | 112,277 | −61,290 | 25.1% | −14.2 pts |
| Elevance Health, Inc. | 47,757 | −2,674 | 10.7% | −0.7 pts |
| Molina Healthcare, Inc. | 47,563 | +367 | 10.6% | −0.04 pts |
| Point32Health, Inc. | 22,908 | +2,067 | 5.1% | +0.4 pts |
| Centene Corporation | 12,041 | +1,658 | 2.7% | +0.3 pts |
| Humana Inc. | 8,765 | +4,854 | 2.0% | +1.1 pts |
| Health Care Service Corporation | 1,700 | −1,054 | 0.4% | −0.2 pts |
| Highmark Health | 169 | 0 | under 0.1% | −0.00 pts |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 60 | +1 | under 0.1% | +0.00 pts |
| Healthfirst, Inc. | 37 | new | under 0.1% | +0.01 pts |
| CareSource | 15 | new | under 0.1% | +0.00 pts |
| Blue Cross & Blue Shield of Rhode Island | 14 | +1 | under 0.1% | +0.00 pts |
| Blue Cross and Blue Shield of Massachusetts, Inc. | 14 | −2 | under 0.1% | −0.00 pts |
| Baystate Health, Inc. | 13 | +2 | under 0.1% | +0.00 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 |
|---|---|---|---|
| Hartford County | 124,620 | n/a | CVS Health Corporation 41% |
| New Haven County | 112,686 | n/a | CVS Health Corporation 45% |
| Fairfield County | 80,281 | n/a | CVS Health Corporation 38% |
| New London County | 37,098 | n/a | CVS Health Corporation 44% |
| Litchfield County | 27,791 | n/a | CVS Health Corporation 51% |
| Middlesex County | 26,667 | n/a | CVS Health Corporation 46% |
| Tolland County | 20,944 | n/a | CVS Health Corporation 49% |
| Windham County | 16,533 | n/a | CVS Health Corporation 48% |