MA Enrollment Explorer / States / Maryland
Medicare Advantage in Maryland: enrollment, penetration and market share
299,433 people in Maryland were enrolled in Medicare Advantage in October 2026. 24.8% of the state's 1,209,085 eligible Medicare beneficiaries are in Medicare Advantage, −0.7 pts since October 2025. Kaiser Foundation Health Plan, Inc. is the largest parent organization with 26% of reported enrollment; 18 parent organizations have 11 or more members, and the market's HHI is 1,645 (moderately concentrated). Through the 2026 Annual Election Period (December to February), reported MA enrollment in Maryland changed by −9,793 (−3.3%).
24.8%MA penetration, October 2026
299KMA enrollees
18parent organizations (11+ members)
1,645HHI, moderately concentrated
Parent organizations in Maryland
| Parent organization | Members | Change | Share | Share change |
|---|---|---|---|---|
| Kaiser Foundation Health Plan, Inc. | 75,840 | +3,279 | 25.5% | +1.1 pts |
| CareFirst, Inc. | 52,798 | +24,055 | 17.8% | +8.1 pts |
| Humana Inc. | 49,946 | +17,025 | 16.8% | +5.7 pts |
| UnitedHealth Group, Inc. | 42,756 | −37,884 | 14.4% | −12.8 pts |
| CVS Health Corporation | 33,777 | −11,582 | 11.4% | −3.9 pts |
| Johns Hopkins Healthcare LLC | 14,384 | +1,522 | 4.8% | +0.5 pts |
| LifeBridge Health, Inc. | 14,163 | +4,498 | 4.8% | +1.5 pts |
| Health Care Service Corporation | 10,195 | −173 | 3.4% | −0.1 pts |
| Elevance Health, Inc. | 1,318 | −69 | 0.4% | −0.02 pts |
| ISNP Holdings, LLC | 528 | +45 | 0.2% | +0.01 pts |
| Highmark Health | 431 | −21 | 0.1% | −0.01 pts |
| SNP Holdings, LLC | 301 | −245 | 0.1% | −0.1 pts |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 262 | −9 | under 0.1% | −0.00 pts |
| The Johns Hopkins Health System Corporation | 139 | +4 | under 0.1% | +0.00 pts |
| Trinity Health Corporation | 78 | +43 | under 0.1% | +0.01 pts |
| Volunteers of America National Services | 50 | new | under 0.1% | +0.02 pts |
| West Baltimore PACE Community Coalition LLC | 47 | +16 | under 0.1% | +0.01 pts |
| UMWA Health and Retirement Funds | 37 | −12 | 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.