Medicare Advantage
Aetna Medicare Advantage in Illinois for 2027: 22 Plans, County by County
SPRINGFIELD, Ill. — For the 2027 plan year, Aetna (which CMS groups as Aetna (CVS Health)) is offering 22 Medicare Advantage plans across Illinois, according to the CMS Medicare Advantage Landscape Source File. Those plans are listed statewide, but Medicare Advantage is sold county by county, so a plan on Aetna's statewide list may or may not be available where you live. This explainer is published by an independent Medicare education site; it is not the government, not affiliated with Medicare, and not Aetna.
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Key takeaways
- Aetna has 22 Medicare Advantage plans listed in Illinois for 2027, and all 22 include drug coverage.
- Aetna is one of 13 carriers offering Medicare Advantage in Illinois for 2027, out of 139 plans statewide.
- Four Aetna plans are new for 2027 and 10 Aetna plans from 2026 are not returning, so check your current plan's status.
- The Annual Enrollment Period runs October 15 – December 7, 2026, and any choice you make takes effect January 1, 2027.
| Fact | Figure | Source |
|---|---|---|
| Part B standard monthly premium (2026) | $202.90 | Medicare.gov |
| Part D out-of-pocket cap (2026) | $2,100 | CMS |
| Part D out-of-pocket cap (2027) | $2,400 | CMS |
| Annual Enrollment Period (for 2027 coverage) | October 15 – December 7, 2026 | Medicare.gov |
| Medicare Advantage Open Enrollment Period | January 1 – March 31 | Medicare.gov |
Area counts are for the county as a whole and are not a recommendation of any plan. Program figures are set nationally.
What does Aetna offer in Illinois for Medicare Advantage in 2027?
Aetna has 22 Medicare Advantage plans in Illinois for 2027, broken down by CMS as 7 HMO, 5 HMO-POS, and 10 PPO plans. All 22 include Part D prescription drug coverage. The lineup includes 3 Special Needs Plans: 1 Dual-Eligible SNP (D-SNP) and 2 Chronic Condition SNPs (C-SNPs); there are no Institutional SNPs on Aetna's Illinois list this year. For context, Illinois has 139 Medicare Advantage plans across 13 carriers for 2027, so Aetna is one of several options a shopper in the state may see.
Which Aetna Medicare Advantage plans reach the most Illinois counties in 2027?
The Aetna plan with the widest county reach in Illinois for 2027 is Aetna Medicare FIDE (HMO D-SNP), listed in 102 counties, according to the CMS Landscape file. After that, the broadest footprints belong to Aetna Medicare Enhanced (PPO) and Aetna Medicare Signature (PPO), each listed in 37 counties, and Aetna Medicare Eagle (PPO), listed in 32 counties. The remaining plans — including the Advantra, Prime, Premier, Signature Extra, and Chronic Care names — are listed in smaller county counts, ranging from 2 to 21 counties. The full plan-by-plan county counts are shown in the table on this page rather than repeated in prose.
What is new or not returning from Aetna in Illinois for 2027?
Aetna is adding 4 new Medicare Advantage plans in Illinois for 2027 and is not renewing 10 of its 2026 plans, based on the CMS Landscape comparison between the current and coming plan year. The new 2027 plans on the list are two Aetna Medicare Signature (HMO) entries, Aetna Medicare Enhanced (HMO), and Aetna Medicare Prime Extra Care (HMO). Two PPO plans have been renamed: Aetna Medicare Advantra (PPO) is now Aetna Medicare Advantra Enhanced (PPO), and Aetna Medicare Advantra Extra (PPO) is now Aetna Medicare Advantra Signature Extra (PPO). If you are currently enrolled in an Aetna plan, your Annual Notice of Change (ANOC) will tell you whether your specific plan is continuing, renamed, or ending for 2027.
How do I check whether an Aetna plan is offered in my Illinois county and covers my doctors and prescriptions?
To confirm whether a specific Aetna plan is offered in your Illinois county for 2027, use the Medicare Plan Finder at medicare.gov and enter your ZIP code, or call 1-800-MEDICARE (TTY 1-877-486-2048), available 24 hours a day, 7 days a week. A plan listed on Aetna's statewide roster — for example, Aetna Medicare Eagle (PPO), Aetna Medicare Signature (HMO-POS), or Aetna Medicare FIDE (HMO D-SNP) — may be offered in some Illinois counties and not others. For doctors and hospitals, check the plan's own provider directory; for prescriptions, check the plan's formulary and Evidence of Coverage. This independent site does not quote premiums, copays, benefits, networks, drug lists, or star ratings for any plan.
What should Illinois Medicare shoppers do before December 7, 2026?
Before December 7, 2026, Illinois shoppers can compare 2027 Medicare Advantage plans — from Aetna and from the 12 other carriers in the state — and enroll, switch, or drop coverage during the Annual Enrollment Period that runs October 15 – December 7, 2026. A choice made in that window takes effect January 1, 2027. A practical checklist:
- Read the Annual Notice of Change from your current plan, which arrives in the fall.
- If your Aetna plan is among the 10 not returning for 2027, note that you will need to pick a new plan or revert to Original Medicare.
- Make a list of your doctors, hospitals, and prescriptions, then check each plan you are considering against them.
- Confirm the plan is offered in your specific Illinois county, not just statewide.
The date is a deadline, not a reason to rush; the goal is a plan that fits your care for the year ahead.
Where can Illinois residents get free help with Medicare questions?
Illinois residents can get free, unbiased Medicare help directly from the federal sources: Medicare.gov for plan comparisons in your ZIP code, and 1-800-MEDICARE (TTY 1-877-486-2048) for live help 24 hours a day, 7 days a week. These sources can confirm which Aetna plans — or plans from any of the other 12 carriers in Illinois — are offered in your county for 2027, and they can walk you through enrollment during the October 15 – December 7, 2026 window.
By the numbers
Medicare Part B premium, 2006–2026
The standard monthly Part B premium has climbed from $88.50 in 2006 to $202.90 in 2026. Hover any point for that year’s premium.
Source: CMS. Standard premium shown; in some hold-harmless years many existing enrollees paid less. Confirm at Medicare.gov.
2027 plan lineup
Aetna Medicare Advantage plans in Illinois for 2027
CMS lists 22 Aetna Medicare Advantage plans across Illinois for 2027, alphabetically by carrier, widest county reach first. 12 other carriers also offer plans there.
| Plan | Type | Drug coverage | Counties |
|---|---|---|---|
| Aetna (CVS Health) 22 plans | |||
| Aetna Medicare FIDE (HMO D-SNP) | HMO D-SNP | Yes | 102 |
| Aetna Medicare Enhanced (PPO) | PPO | Yes | 37 |
| Aetna Medicare Signature (PPO) | PPO | Yes | 37 |
| Aetna Medicare Eagle (PPO) | PPO | Yes | 32 |
| Aetna Medicare Eagle (PPO) | PPO | Yes | 21 |
| Aetna Medicare Advantra Enhanced (PPO) | PPO | Yes | 12 |
| Aetna Medicare Advantra Signature Extra (PPO) | PPO | Yes | 12 |
| Aetna Medicare Signature (HMO-POS) | HMO-POS | Yes | 12 |
| Aetna Medicare Signature Extra (HMO-POS) | HMO-POS | Yes | 12 |
| Aetna Medicare Prime Chronic Care (HMO C-SNP) | HMO C-SNP | Yes | 10 |
| Aetna Medicare Signature (HMO) | HMO | Yes | 7 |
| Aetna Medicare Chronic Care (HMO C-SNP) | HMO C-SNP | Yes | 6 |
| Aetna Medicare Enhanced (HMO) | HMO | Yes | 6 |
| Aetna Medicare Premier (PPO) | PPO | Yes | 6 |
| Aetna Medicare Prime (HMO-POS) | HMO-POS | Yes | 6 |
| Aetna Medicare Prime Extra Care (HMO) | HMO | Yes | 6 |
| Aetna Medicare Signature (HMO-POS) | HMO-POS | Yes | 6 |
| Aetna Medicare Signature (HMO-POS) | HMO-POS | Yes | 6 |
| Aetna Medicare Signature (PPO) | PPO | Yes | 6 |
| Aetna Medicare Signature Extra (PPO) | PPO | Yes | 6 |
| Aetna Medicare Signature (PPO) | PPO | Yes | 3 |
| Aetna Medicare Signature (HMO) | HMO | Yes | 2 |
Source: CMS Medicare Advantage Landscape Source Files, plan years 2026 and 2027. Plans are offered county by county; a plan listed for the state may not be offered in your county. No plan is ranked or recommended; premiums, benefits, networks and star ratings are not shown. Plan details come from the Medicare Plan Finder at medicare.gov or the plan itself.
The 2027 choices, by type
How Aetna Medicare Advantage plans across Illinois break down for 2027
HMO plans use a network and usually a primary-care doctor and referrals; HMO-POS plans add some out-of-network coverage; PPO plans also cover out-of-network care, at a higher share; PFFS plans pay any provider that accepts the plan’s terms. Special Needs Plans serve people with Medicare and Medicaid (D-SNP), certain chronic conditions (C-SNP) or living in an institution (I-SNP).
Source: CMS Medicare Advantage Landscape Source Files, plan years 2026 and 2027. Plans are offered county by county; a plan listed for the state may not be offered in your county. No plan is ranked or recommended; premiums, benefits, networks and star ratings are not shown. Plan details come from the Medicare Plan Finder at medicare.gov or the plan itself.
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Frequently asked questions
How many Medicare Advantage plans does Aetna offer in Illinois for 2027?
Does a plan on Aetna's statewide list mean it's available in my county?
What if my current Aetna plan is one of the 10 not returning for 2027?
When does a 2027 enrollment choice take effect?
- CMS — MA Landscape Source File (plan-level availability by county)
- CMS — MA Landscape Source Files, current and coming plan year (year-over-year comparison)
- CMS — Medicare enrollment periods (medicare.gov)
For personalized answers, contact Medicare.gov or 1-800-MEDICARE.
Sources and methodology
- Medicare.gov, Medicare costs (Part B premium)
- CMS, Medicare prescription drug coverage (Part D) program rules
- CMS, Medicare Advantage and Part D plan-year announcements
- Medicare.gov, enrollment periods and plan rules
- CMS, Medicare Advantage and Part D Landscape Source Files
Figures cited in this article
- CMS — MA Landscape Source File (CY2027): Aetna's Illinois plan count, plan types, SNP counts, drug coverage count, and county-level availability for each plan.
- CMS — MA Landscape Source Files (CY2026 and CY2027): the year-over-year comparison showing 4 new Aetna plans, 10 not returning, and the two renamed Advantra PPO plans.
- Medicare.gov (CMS — Medicare enrollment periods): the October 15 – December 7, 2026 Annual Enrollment Period dates and the January 1, 2027 effective date.
How we put this together: area counts come from the CMS files listed above for the county that contains this city, program figures come from CMS, Medicare.gov and the Social Security Administration, and no plan is ranked or recommended.
By The Medicare Desk · Published . For personalized answers, contact Medicare.gov or 1-800-MEDICARE.
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This page was last updated: October 2026.