MA payer · 4 active contracts

HEALTH CARE SERVICE CORPORATION

165,307

Total MA enrolled

592

Counties served

States served

Largest state

Top states by enrollment

1TX60,392
2IL45,789
3NM33,446
4MT13,965
5OK4,370
6FL1,359
7IN786
8AZ675
9WI484
10CO465
11KY436
12CA412
13TN265
14AR261
15NC260

Top counties

by single-county enrollment

Cook, IL
HMO/HMOPOS · contract H3822
9,657
Bernalillo, NM
HMO/HMOPOS · contract H3251
7,408
Cook, IL
Local PPO · contract H0107
6,854
Travis, TX
Local PPO · contract H0107
6,615
Cook, IL
Local PPO · contract H8634
6,249
Harris, TX
Local PPO · contract H0107
5,358
Dallas, TX
Local PPO · contract H0107
4,269
Brazos, TX
Local PPO · contract H0107
3,637
Galveston, TX
Local PPO · contract H0107
3,401
Bexar, TX
Local PPO · contract H0107
3,015
Tarrant, TX
Local PPO · contract H0107
2,557
DuPage, IL
HMO/HMOPOS · contract H3822
2,427
Gallatin, MT
Local PPO · contract H0107
2,248
Williamson, TX
Local PPO · contract H0107
1,979
Bernalillo, NM
Local PPO · contract H8634
1,901

Plan-type mix (enrollment)

Local PPO

123,252 enrolled

HMO/HMOPOS

42,055 enrolled

Source: CMS Monthly MA Enrollment by State/County/Contract (May 2026, abridged). Enrollment counts ≤ 10 are excluded from the source file (HIPAA suppression).