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Medicare plans in Williamson County, IL — 2027
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 2027, Williamson County, Illinois has 19 Medicare plans (4 Medicare Advantage with drug coverage, 1 without, 10 standalone Part D, 4 Special Needs) from 7 carriers. 8 Medicare Advantage plans have a $0 premium. The lowest in-network out-of-pocket maximum is $5,500.
What changed vs 2026
- 11 fewer plans than 2026
- Carriers exited: Blue Cross and Blue Shield of Illinois
- $0-premium plans down 6
- Average star rating up 0.4
Market snapshot
- Residents 65 and older
- 13,136
- Residents 60–64, aging in over the next five years
- 4,783
- Medicare eligibles
- 16,330
- Medicare Advantage penetration
- 38.0%
- Plans per 1,000 residents 65+
- 1.4
Carriers by number of plans
- Humana — 6 plans
- Wellcare — 6 plans
- HealthSpring — 2 plans
- UnitedHealthcare — 2 plans
- Aetna Medicare — 1 plan
- 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 |
|---|---|---|---|---|---|---|---|
| Humana Basic Rx Plan (PDP) (S5884-107-0) | Humana | PDP | PDP | $6.30 | $700 | 4.5 | |
| Humana Value Rx Plan (PDP) (S5884-196-0) | Humana | PDP | PDP | $22.30 | $687 | 4.5 | |
| Humana Premier Rx Plan (PDP) (S5884-163-0) | Humana | PDP | PDP | $130.20 | $350 | 4.5 | |
| Humana USAA Honor Giveback (Regional PPO) (R5361-001-0) | Humana | MA | Regional PPO | $0 | $6,750 | 3.5 | |
| Wellcare Giveback (HMO) (H5779-010-0) | Wellcare | MA-PD | HMO | $0 | $700 | $7,800 | 3.5 |
| Wellcare Simple Essential (HMO) (H5779-009-0) | Wellcare | MA-PD | HMO | $0 | $700 | $5,500 | 3.5 |
| HumanaChoice R5361-002 (Regional PPO) (R5361-002-0) | Humana | MA-PD | Regional PPO | $87 | $700 | $7,700 | 3.5 |
| Wellcare Simple Value (HMO-POS) (H1416-084-0) | Wellcare | MA-PD | HMO-POS | $0 | $700 | $5,500 | 3.0 |
| Wellcare Value Script (PDP) (S4802-151-0) | Wellcare | PDP | PDP | $5.30 | $700 | 3.0 | |
| Wellcare Classic (PDP) (S4802-087-0) | Wellcare | PDP | PDP | $7.30 | $700 | 3.0 |
Showing 10 of 19 plans.
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About this data
Source: CMS Medicare Advantage/Part D Landscape files, plan year 2027; population: U.S. Census Bureau ACS 5-year 2024; MA penetration: CMS October 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.