Medicare Advantage plans in Williamson County, IL: what changed for 2027
For 2027, Williamson County in Illinois has 4 Medicare Advantage plans that include drug coverage, compared with 10 in 2026, according to the CMS plan landscape files.
Companies no longer offering Advantage plans here in 2027
- CVS Health Corporation
- Health Care Service Corporation
If you are in one of their plans, you should have received a notice. You can choose a new plan during Open Enrollment, and special enrollment rules can apply when a plan leaves your area.
10 Advantage plan IDs (not counting Special Needs or Cost plans) listed here for 2026 are not in the 2027 file and 1 plan IDs are new. Some of these are the same plan renamed or merged, so check the Annual Notice of Change from your plan.
How many people here are in Medicare Advantage
In October 2026, 6,210 of the 16,330 people eligible for Medicare in Williamson County were enrolled in a Medicare Advantage or other Medicare health plan, 38.0%. A year earlier it was 6,110 of 16,214 (37.7%).
CMS counts enrollees in all Medicare health plans, including Advantage, cost and PACE plans, by the county where they live.
Before you choose a plan
Compare plans for your ZIP code, drugs and doctors on the official Medicare Plan Finder, or call 1-800-MEDICARE (1-800-633-4227). Free, unbiased counselling is available from your State Health Insurance Assistance Program at shiphelp.org.
Advantage plans with drug coverage for 2027 (4)
| Plan | Company | Type | Monthly premium | In-network out-of-pocket limit | Star rating |
|---|---|---|---|---|---|
| Wellcare Giveback (HMO) | Wellcare | HMO | $0 | $7,800 | 3.5 of 5 |
| Wellcare Simple Essential (HMO) | Wellcare | HMO | $0 | $5,500 | 3.5 of 5 |
| Wellcare Simple Value (HMO-POS) | Wellcare | HMO-POS | $0 | $5,500 | 3 of 5 |
| HumanaChoice R5361-002 (Regional PPO) | Humana | Regional PPO | $87.00 | $7,700 | 3.5 of 5 |
Advantage plans without drug coverage for 2027 (1)
| Plan | Company | Type | Monthly premium | In-network out-of-pocket limit | Star rating |
|---|---|---|---|---|---|
| Humana USAA Honor Giveback (Regional PPO) | Humana | Regional PPO | Not listed | $6,750 | 3.5 of 5 |
Special Needs Plans for 2027 (4)
| Plan | Company | Type | Monthly premium | In-network out-of-pocket limit | Star rating |
|---|---|---|---|---|---|
| Aetna Medicare FIDE (HMO D-SNP) | Aetna Medicare FIDE | HMO D-SNP · Dual-Eligible | $0 | $9,850 | Plan Too New To Be Measured |
| Humana Dual Fully Integrated (HMO D-SNP) | Humana | HMO D-SNP · Dual-Eligible | $0 | $9,250 | Plan Too New To Be Measured |
| Molina Medicare Complete Care Plus (HMO D-SNP) | Molina Healthcare of Illinois | HMO D-SNP · Dual-Eligible | $0 | $9,850 | Plan Too New To Be Measured |
| Wellcare Meridian Dual Align (HMO D-SNP) | Wellcare | HMO D-SNP · Dual-Eligible | $0 | $9,850 | Plan Too New To Be Measured |
Stand-alone Part D drug plans are offered statewide: see Illinois drug plans.
Sources
- Centers for Medicare & Medicaid Services, CY2027 Medicare Advantage and Part D Landscape file (data last updated 18 October 2026)
- Centers for Medicare & Medicaid Services, CY2026 Medicare Advantage and Part D Landscape file (September 2026 release)
- Centers for Medicare & Medicaid Services, MA State/County Penetration files, October 2026 and October 2025
Checked 29 October 2026. Plans and premiums can change before 1 January 2027. Confirm any plan on Medicare.gov before you enrol.