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Medicare plans in Williamson County, IL — 2026
What agents look up before working a county: plan count, carriers, $0-premium share, star distribution, MOOP range, the 65+ and 60–64 population, and what changed since last year.
In 2026, Williamson County, Illinois has 30 Medicare plans (10 Medicare Advantage with drug coverage, 4 without, 12 standalone Part D, 4 Special Needs) from 8 carriers. 10 Medicare Advantage plans have a $0 premium. The lowest in-network out-of-pocket maximum is $3,900.
Market snapshot
- Residents 65 and older
- 13,136
- Residents 60–64, aging in over the next five years
- 4,783
- Medicare eligibles
- 16,292
- Medicare Advantage penetration
- 38.1%
- Plans per 1,000 residents 65+
- 2.3
Carriers by number of plans
- Wellcare — 7 plans
- Blue Cross and Blue Shield of IL, NM, OK, TX — 6 plans
- Humana — 6 plans
- Aetna Medicare — 4 plans
- HealthSpring — 3 plans
- UnitedHealthcare — 2 plans
- Aetna Medicare FIDE — 1 plan
- Molina Healthcare of Illinois — 1 plan
Plans sorted by CMS star rating, then premium
| Plan | Carrier | Category | Plan type | Monthly premium | Drug deductible | Out-of-pocket maximum | Star rating |
|---|
| Aetna Medicare Signature (PPO) (H7301-027-0) | Aetna Medicare | MA-PD | PPO | $0 | $615 | $9,250 | 3.5 |
|---|
| Aetna Medicare Enhanced (PPO) (H7301-034-0) | Aetna Medicare | MA-PD | PPO | $69 | $615 | $8,750 | 3.5 |
|---|
| Aetna Medicare Eagle (PPO) (H7301-023-0) | Aetna Medicare | MA | PPO | | | $4,500 | 3.5 |
|---|
| Blue Cross Medicare Advantage Dental Premier (PPO) (H8634-021-0) | Blue Cross and Blue Shield of IL, NM, OK, TX | MA-PD | PPO | $0 | $615 | $7,500 | 3.0 |
|---|
| Blue Cross Medicare Advantage Essential (PPO) (H8634-012-0) | Blue Cross and Blue Shield of IL, NM, OK, TX | MA-PD | PPO | $0 | $450 | $6,700 | 3.0 |
|---|
| Blue Cross Medicare Advantage Health Choice (PPO) (H8634-018-0) | Blue Cross and Blue Shield of IL, NM, OK, TX | MA-PD | PPO | $0 | $615 | $9,000 | 3.0 |
|---|
| HealthSpring True Choice (PPO) (H7849-059-0) | HealthSpring | MA-PD | PPO | $0 | $200 | $4,250 | 3.0 |
|---|
| Wellcare Giveback (HMO) (H5779-010-0) | Wellcare | MA-PD | HMO | $0 | $615 | $7,500 | 3.0 |
|---|
| Wellcare Simple Essential (HMO) (H5779-002-0) | Wellcare | MA-PD | HMO | $0 | $615 | $4,200 | 3.0 |
|---|
| Wellcare Simple Essential Value (HMO) (H5779-009-0) | Wellcare | MA-PD | HMO | $0 | $615 | $3,900 | 3.0 |
|---|
Showing 10 of 30 plans.
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About this data
Source: CMS Medicare Advantage/Part D Landscape files, plan year 2026; population: U.S. Census Bureau ACS 5-year 2024; MA penetration: CMS September 2026.
This page summarizes publicly available CMS data. It is not a plan finder and does not recommend plans. To compare and enroll in plans, use Medicare.gov or talk to a licensed agent. Medicare.gov plan finder.