MA Enrollment Explorer / Parent organizations / Memorial Hermann Health System
Memorial Hermann Health System: Medicare Advantage enrollment and market share
Memorial Hermann Health System had 14,669 Medicare Advantage members in October 2026, #91 nationally with 0.04% of all MA enrollment. It gained 1,834 members (+14.3%) since October 2025, and has enrollment in 1 state and 7 counties with 11 or more members. In the 2026 Annual Election Period (December to February) it gained 1,667 members (+12.9%). For 2027, 14,552 of its members are in plans that terminate and 0 in plans leaving their county, and it leaves 7 counties entirely.
15KMA members, October 2026
+14.3%change since October 2025 (+1,834)
0.04%national MA share, rank 91
1contracts with enrollment
Largest states
| State | Members | Share of state MA |
|---|---|---|
| Texas | 14,571 | 0.5% |
Largest counties
| County | Members | Change since October 2025 | Share of county MA |
|---|---|---|---|
| Harris County, TX | 8,920 | +1,241 | 2.2% |
| Fort Bend County, TX | 2,671 | +281 | 3.5% |
| Montgomery County, TX | 1,694 | +124 | 2.6% |
| Brazoria County, TX | 724 | +93 | 1.9% |
| Galveston County, TX | 447 | +63 | 1.1% |
| Liberty County, TX | 81 | +7 | 0.8% |
| Waller County, TX | 34 | +7 | 0.7% |
Contracts
| Contract | Plan type | Oct 2024 | Oct 2025 | Oct 2026 |
|---|---|---|---|---|
| H7115 Memorial Hermann Health Plan | HMO/HMOPOS | 9,796 | 12,835 | 14,669 |
Star ratings for these contracts are in the MA Quality Dashboard.