MA Enrollment Explorer / Parent organizations / UnitedHealth Group, Inc.
UnitedHealth Group, Inc.: Medicare Advantage enrollment and market share
UnitedHealth Group, Inc. had 9,354,348 Medicare Advantage members in October 2026, #1 nationally with 25.7% of all MA enrollment. It lost 940,150 members (−9.1%) since October 2025, and has enrollment in 53 states and 2,978 counties with 11 or more members, leading the market in 1,248 of them. In the 2026 Annual Election Period (December to February) it lost 937,967 members (−9.1%). For 2027, 667,325 of its members are in plans that terminate and 307,661 in plans leaving their county, and it leaves 30 counties entirely. Among members who stay, 1,259,303 lose a Part B giveback and 639,461 an OTC allowance.
9.35MMA members, October 2026
−9.1%change since October 2025 (−940,150)
25.7%national MA share, rank 1
61contracts with enrollment
Largest states
| State | Members | Share of state MA |
|---|---|---|
| Texas | 1,319,235 | 47.7% |
| Florida | 882,796 | 28.7% |
| North Carolina | 428,694 | 31.8% |
| New York | 392,759 | 18.0% |
| California | 381,030 | 10.2% |
| Washington | 358,576 | 45.5% |
| Ohio | 343,789 | 23.0% |
| Missouri | 335,519 | 44.8% |
| Arizona | 326,481 | 40.5% |
| Georgia | 320,584 | 28.0% |
| Wisconsin | 277,694 | 35.2% |
| Indiana | 254,920 | 34.9% |
| Colorado | 251,349 | 44.2% |
| Tennessee | 231,909 | 28.3% |
| Illinois | 220,165 | 20.1% |
Largest counties
| County | Members | Change since October 2025 | Share of county MA |
|---|---|---|---|
| Maricopa County, AZ | 162,652 | −25,555 | 38.5% |
| Harris County, TX | 146,942 | −5,255 | 35.9% |
| Miami-Dade County, FL | 119,360 | +2,594 | 30.1% |
| Tarrant County, TX | 110,846 | −2,808 | 60.4% |
| Dallas County, TX | 106,581 | −1,799 | 53.1% |
| Bexar County, TX | 94,740 | −14,431 | 46.6% |
| Pima County, AZ | 88,981 | −4,053 | 58.3% |
| Clark County, NV | 88,460 | −7,618 | 36.2% |
| King County, WA | 87,307 | +1,498 | 44.0% |
| Los Angeles County, CA | 78,898 | −21,828 | 8.0% |
| Cook County, IL | 76,127 | −1,398 | 18.9% |
| San Diego County, CA | 68,703 | −4,431 | 20.3% |
| Milwaukee County, WI | 67,918 | −1,874 | 59.9% |
| St. Louis County, MO | 55,883 | −2,501 | 42.6% |
| Pierce County, WA | 50,722 | +2,746 | 55.2% |
Contracts
| Contract | Plan type | Oct 2024 | Oct 2025 | Oct 2026 |
|---|---|---|---|---|
| H2001 UnitedHealthcare | Local PPO | 2,000,921 | 2,634,251 | 2,250,467 |
| H5253 UnitedHealthcare | HMO/HMOPOS | 788,293 | 1,155,839 | 1,161,236 |
| H0609 UnitedHealthcare | HMO/HMOPOS | 708,855 | 749,816 | 753,515 |
| H2406 UnitedHealthcare | Local PPO | 724,569 | 719,225 | 562,971 |
| H2802 UnitedHealthcare | HMO/HMOPOS | 271,353 | 356,744 | 411,301 |
| H1045 UnitedHealthcare | HMO/HMOPOS | 340,128 | 385,456 | 397,081 |
| H8768 UnitedHealthcare | Local PPO | 504,187 | 525,128 | 300,756 |
| H3805 UnitedHealthcare | HMO/HMOPOS | 144,592 | 218,972 | 287,472 |
| H1889 UnitedHealthcare | Local PPO | 340,731 | 369,746 | 265,678 |
| H0543 UnitedHealthcare | HMO/HMOPOS | 336,299 | 313,753 | 249,748 |
| H5322 UnitedHealthcare | HMO/HMOPOS | 206,309 | 195,808 | 218,576 |
| H4527 UnitedHealthcare | HMO/HMOPOS | 165,677 | 184,523 | 199,921 |
| H1961 Peoples Health | HMO/HMOPOS | 108,569 | 149,883 | 157,054 |
| H4514 UnitedHealthcare | HMO/HMOPOS | 76,245 | 150,205 | 149,674 |
| H3387 UnitedHealthcare | HMO/HMOPOS | 156,130 | 172,294 | 149,185 |
| H4604 UnitedHealthcare | HMO/HMOPOS | 127,930 | 143,526 | 140,052 |
| H1278 UnitedHealthcare | Local PPO | 214,357 | 193,097 | 136,364 |
| H3379 UnitedHealthcare | HMO/HMOPOS | 45,323 | 115,293 | 102,090 |
| H0169 UnitedHealthcare | HMO/HMOPOS | 82,486 | 106,485 | 102,068 |
| H0755 UnitedHealthcare | HMO/HMOPOS | 64,969 | 60,373 | 96,395 |
| H3113 UnitedHealthcare | HMO/HMOPOS | 84,928 | 89,818 | 80,038 |
| H0251 UnitedHealthcare | HMO/HMOPOS | 79,179 | 78,941 | 76,417 |
| H2509 UnitedHealthcare | HMO/HMOPOS | 8,061 | 54,053 | 75,614 |
| H0294 UnitedHealthcare | Local PPO | 161,080 | 138,585 | 71,114 |
| H0321 UnitedHealthcare | HMO/HMOPOS | 68,209 | 71,361 | 70,595 |
Star ratings for these contracts are in the MA Quality Dashboard.