MA Enrollment Explorer / Parent organizations / Centene Corporation
Centene Corporation: Medicare Advantage enrollment and market share
Centene Corporation had 910,693 Medicare Advantage members in October 2026, #6 nationally with 2.5% of all MA enrollment. It lost 94,825 members (−9.4%) since October 2025, and has enrollment in 32 states and 1,715 counties with 11 or more members, leading the market in 15 of them. In the 2026 Annual Election Period (December to February) it lost 33,146 members (−3.3%). For 2027, 185,169 of its members are in plans that terminate and 58,515 in plans leaving their county, and it leaves 163 counties entirely.
911KMA members, October 2026
−9.4%change since October 2025 (−94,825)
2.5%national MA share, rank 6
58contracts with enrollment
Largest states
| State | Members | Share of state MA |
|---|---|---|
| New York | 161,600 | 7.4% |
| Texas | 106,842 | 3.9% |
| California | 81,458 | 2.2% |
| Florida | 48,520 | 1.6% |
| Illinois | 48,357 | 4.4% |
| Arizona | 46,541 | 5.8% |
| Kentucky | 39,359 | 7.0% |
| Oregon | 36,097 | 6.9% |
| Washington | 33,381 | 4.2% |
| Georgia | 31,824 | 2.8% |
| Michigan | 30,274 | 2.0% |
| South Carolina | 24,967 | 4.1% |
| Arkansas | 24,249 | 7.4% |
| Mississippi | 23,394 | 7.9% |
| Maine | 20,878 | 9.1% |
Largest counties
| County | Members | Change since October 2025 | Share of county MA |
|---|---|---|---|
| Los Angeles County, CA | 36,131 | −6,253 | 3.7% |
| Harris County, TX | 33,409 | −4,684 | 8.2% |
| Cook County, IL | 25,181 | −2,204 | 6.3% |
| Queens County, NY | 18,248 | −2,849 | 7.0% |
| Kings County, NY | 16,764 | −2,096 | 7.0% |
| Suffolk County, NY | 11,732 | −240 | 11.6% |
| Bronx County, NY | 11,235 | −2,135 | 6.7% |
| Dallas County, TX | 11,032 | −4,125 | 5.5% |
| Wayne County, MI | 10,527 | −1,384 | 4.6% |
| Maricopa County, AZ | 9,911 | −967 | 2.3% |
| New York County, NY | 8,479 | −651 | 6.0% |
| Yuma County, AZ | 8,382 | +1,542 | 33.8% |
| Hidalgo County, TX | 8,367 | −1,172 | 8.5% |
| Orange County, FL | 7,480 | −1,407 | 5.3% |
| Nassau County, NY | 7,079 | −581 | 6.9% |
Contracts
| Contract | Plan type | Oct 2024 | Oct 2025 | Oct 2026 |
|---|---|---|---|---|
| H5599 Wellcare | HMO/HMOPOS | 56,745 | 61,470 | 68,773 |
| H2775 Wellcare | Local PPO | 95,000 | 85,956 | 57,788 |
| H1416 Wellcare | HMO/HMOPOS | 57,739 | 55,805 | 55,785 |
| H0174 Wellcare | HMO/HMOPOS | 67,206 | 70,766 | 51,477 |
| H1032 Wellcare | HMO/HMOPOS | 73,008 | 60,230 | 48,592 |
| H3561 Wellcare | HMO/HMOPOS | 64,126 | 54,560 | 45,175 |
| H4868 Wellcare | HMO/HMOPOS | 65,679 | 37,814 | 39,628 |
| H9730 Wellcare | HMO/HMOPOS | 35,238 | 36,221 | 36,009 |
| H0029 Wellcare | HMO/HMOPOS | 0 | 17,702 | 31,644 |
| H4506 Wellcare | HMO/HMOPOS | 28,394 | 26,704 | 28,488 |
| H5590 Wellcare | HMO/HMOPOS | 22,672 | 24,969 | 26,737 |
| H1112 Wellcare | HMO/HMOPOS | 31,419 | 29,750 | 26,025 |
| H0562 Wellcare | HMO/HMOPOS | 46,181 | 35,236 | 23,812 |
| H0351 Wellcare | HMO/HMOPOS | 18,429 | 20,999 | 23,252 |
| H9630 Wellcare | HMO/HMOPOS | 21,394 | 23,914 | 20,358 |
| H5439 Wellcare | Local PPO | 18,016 | 23,302 | 19,271 |
| H5475 Wellcare | HMO/HMOPOS | 23,615 | 19,571 | 19,176 |
| H5294 Wellcare | HMO/HMOPOS | 39,364 | 25,469 | 16,465 |
| H6971 Wellcare | HMO/HMOPOS | n/a | n/a | 15,094 |
| H9364 Wellcare | HMO/HMOPOS | 7,852 | 12,834 | 14,854 |
| H2915 Wellcare | HMO/HMOPOS | 10,492 | 14,678 | 14,480 |
| H1862 Wellcare | HMO/HMOPOS | 1,102 | 4,126 | 12,928 |
| H5779 Wellcare | HMO/HMOPOS | 9,390 | 7,643 | 12,891 |
| H7326 Wellcare | Local PPO | 16,618 | 16,448 | 12,763 |
| H8189 Wellcare | HMO/HMOPOS | 7,575 | 8,423 | 12,733 |
Star ratings for these contracts are in the MA Quality Dashboard.