MA Enrollment Explorer / Parent organizations / Highmark Health
Highmark Health: Medicare Advantage enrollment and market share
Highmark Health had 424,853 Medicare Advantage members in October 2026, #11 nationally with 1.2% of all MA enrollment. It lost 61,497 members (−12.6%) since October 2025, and has enrollment in 43 states and 503 counties with 11 or more members, leading the market in 11 of them. In the 2026 Annual Election Period (December to February) it lost 63,545 members (−13.1%). For 2027, 13,924 of its members are in plans that terminate and 4,488 in plans leaving their county.
425KMA members, October 2026
−12.6%change since October 2025 (−61,497)
1.2%national MA share, rank 11
9contracts with enrollment
Largest states
| State | Members | Share of state MA |
|---|---|---|
| Pennsylvania | 323,940 | 19.5% |
| New York | 37,177 | 1.7% |
| West Virginia | 18,135 | 7.0% |
| Delaware | 8,664 | 10.2% |
| Ohio | 7,841 | 0.5% |
| Alabama | 3,237 | 0.5% |
| North Carolina | 2,824 | 0.2% |
| Florida | 2,489 | 0.1% |
| Virginia | 2,448 | 0.4% |
| Tennessee | 1,819 | 0.2% |
| Kansas | 1,661 | 0.8% |
| Kentucky | 1,610 | 0.3% |
| Texas | 1,254 | 0.0% |
| Nebraska | 935 | 0.7% |
| Illinois | 864 | 0.1% |
Largest counties
| County | Members | Change since October 2025 | Share of county MA |
|---|---|---|---|
| Allegheny County, PA | 59,095 | +4,567 | 30.3% |
| Westmoreland County, PA | 24,535 | +1,106 | 33.2% |
| Lancaster County, PA | 20,541 | −120 | 31.2% |
| Erie County, NY | 20,216 | −18,499 | 12.9% |
| York County, PA | 15,634 | −243 | 27.6% |
| Washington County, PA | 13,405 | +157 | 34.2% |
| Beaver County, PA | 12,093 | +446 | 36.8% |
| Lehigh County, PA | 11,950 | −384 | 30.1% |
| Butler County, PA | 11,659 | +845 | 32.5% |
| Dauphin County, PA | 10,367 | −665 | 26.6% |
| Berks County, PA | 10,270 | −1,331 | 23.0% |
| Erie County, PA | 9,904 | +402 | 22.9% |
| Cumberland County, PA | 9,367 | −317 | 27.9% |
| Northampton County, PA | 7,438 | −2,732 | 21.0% |
| Lebanon County, PA | 7,364 | −363 | 38.0% |
Contracts
| Contract | Plan type | Oct 2024 | Oct 2025 | Oct 2026 |
|---|---|---|---|---|
| H3916 Highmark Blue Cross Blue Shield or Highmark Blue Shield | Local PPO | 226,479 | 277,632 | 240,144 |
| H3957 Highmark Blue Cross Blue Shield or Highmark Blue Shield | HMO/HMOPOS | 55,015 | 57,679 | 81,792 |
| H5932 Highmark Wholecare Medicare Assured | HMO/HMOPOS | 37,135 | 39,257 | 40,593 |
| H3384 Highmark Blue Cross Blue Shield or Highmark Blue Shield | HMO/HMOPOS | 47,567 | 45,598 | 22,631 |
| H5106 Highmark Blue Cross Blue Shield | Local PPO | 17,570 | 24,180 | 16,063 |
| H5526 Highmark Blue Cross Blue Shield or Highmark Blue Shield | Local PPO | 31,004 | 23,842 | 14,820 |
| H7710 Highmark Blue Cross Blue Shield | HMO/HMOPOS | n/a | 2,293 | 4,483 |
| H8166 Highmark Blue Cross Blue Shield | Local PPO | 10,247 | 15,869 | 4,059 |
| H6224 Highmark Blue Cross Blue Shield | HMO/HMOPOS | n/a | n/a | 268 |
Star ratings for these contracts are in the MA Quality Dashboard.