Medicare Advantage in Montgomery County, Maryland
45,114 people in Montgomery County, Maryland were enrolled in Medicare Advantage in October 2026, 22.6% of 199,967 eligible beneficiaries (−1.1 pts since October 2025). Kaiser Foundation Health Plan, Inc. is the largest parent organization with 50% of reported enrollment; 13 parent organizations have 11 or more members and the HHI is 3,000 (highly concentrated). For 2027, 4,105 members here are in plans that terminate or leave the county, and CVS Health Corporation, SNP Holdings, LLC leave. MA plans offered go from 27 to 20.
Parent organizations in Montgomery County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Kaiser Foundation Health Plan, Inc. | 22,315 | +1,649 | 49.8% |
| CareFirst, Inc. | 6,781 | +4,198 | 15.1% |
| UnitedHealth Group, Inc. | 5,014 | −8,846 | 11.2% |
| CVS Health Corporation | 3,981 | −107 | 8.9% |
| Humana Inc. | 3,553 | +1,430 | 7.9% |
| Johns Hopkins Healthcare LLC | 2,367 | +686 | 5.3% |
| LifeBridge Health, Inc. | 461 | +342 | 1.0% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 89 | +1 | 0.2% |
| Trinity Health Corporation | 78 | +43 | 0.2% |
| Elevance Health, Inc. | 70 | 0 | 0.2% |
| Health Care Service Corporation | 64 | −10 | 0.1% |
| Highmark Health | 41 | −1 | under 0.1% |
| SNP Holdings, LLC | 31 | −5 | under 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 34,512 beneficiaries in Montgomery County were assigned to 249 Medicare Shared Savings Program ACOs, 35.9% of assignable Original Medicare beneficiaries. Together, roughly 50% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.