Medicare Advantage in St. Clair County, IL, for 2027.
CMS lists 48 Medicare Advantage plans here for 2027, 8 fewer than 2026 (56). 30,218 people in the county had an individual Medicare Advantage plan in October 2026.
Sources: CMS CY2027 plan file (October 2026 release), CMS CY2026 plan file (September 2026 release), CMS enrollment by county (CPSC), October 2026, CMS 2027 Plan Crosswalk (October 1, 2026), CMS 2027 Star Ratings Data Tables (October 8, 2026). Member counts are floors because CMS hides counts of 10 or fewer.
The county in numbers
Plans that end here for 2027
10 plans with members in the county end or leave it, plus 39 with 10 or fewer members here. CMS moves 433 members to another plan, and 22,942 stay in the same plan.
| Plan | Insurer | Members | Why |
|---|---|---|---|
| Aetna Medicare Enhanced Extra (HMO-POS) | CVS Health | 1,075 | Plan leaves this county |
| AARP Medicare Advantage from UHC ST-2 (PPO) | UnitedHealth | 437 | Plan terminated |
| Aetna Medicare Elite (PPO) | CVS Health | 162 | Plan leaves this county |
| HealthSpring True Choice Savings (PPO) | Health Care Service | 47 | Plan terminated |
| Aetna Medicare Enhanced (PPO) | CVS Health | 46 | Plan leaves this county |
| Blue Cross Medicare Advantage Value (HMO) | Health Care Service | 37 | Plan terminated |
| Blue Cross Medicare Advantage Essential (PPO) | Health Care Service | 37 | Plan terminated |
| Blue Cross Medicare Advantage Dental Premier (PPO) | Health Care Service | 20 | Plan terminated |
| Molina Medicare Choice Care (HMO) | Molina Healthcare | 15 | Plan terminated |
| Blue Cross Medicare Advantage Health Choice (PPO) | Health Care Service | 14 | Plan terminated |
Where CMS moves members
| 2026 plan | 2027 plan | Members |
|---|---|---|
| Molina Medicare Complete Care Plus (HMO D-SNP) | Molina Medicare Complete Care Plus (HMO D-SNP) | 334 |
| Wellcare Simple Essential (HMO) | Wellcare Simple Essential (HMO) | 99 |
| Molina Medicare Complete Care Plus (HMO D-SNP) | Molina Medicare Complete Care Plus (HMO D-SNP) | 10 or fewer |
Who holds the members
- UnitedHealth13,157
- CVS Health6,212
- Lumeris Group Holdings5,316
- Humana3,764
- Devoted Health739
- Centene449
Individual Medicare Advantage members by parent company, October 2026.
Top rated plans sold here
- Humana Essentials Plus Giveback (HMO)Humana4.5
- Humana Essentials Plus Giveback (HMO)Humana4.5
- Humana Full Access (PPO)Humana4.5
- Humana Total Complete (HMO)Humana4.5
- Humana Total Complete (HMO)Humana4.5
- Humana USAA Honor Giveback (PPO)Humana4.5
- Humana Value Choice (PPO)Humana4.5
- HumanaChoice Giveback H7617-013 (PPO)Humana4.5
2027 overall Star Rating, 4.5 or more. Each plan's measure stars are in the county lookup.
See every plan, premium and copay in the free lookup.
Sort all 48 plans, open each plan's benefits and star measures, and see what each insurer paid agents in 2026.
Open St. Clair in the lookupWorking this county for AEP?
The AEP 2027 County Kit puts this county and your others in one file: the plans that end, where members land, what is still sold and a crosswalk sheet, with every number tied to its CMS file.
See the AEP 2027 County KitAll Illinois county pages. Facts from public CMS files, prepared by Health and Tech Now. Not plan advice. Check a plan's Summary of Benefits before you enroll.