Medicare Advantage

Aetna Medicare Advantage in Colorado for 2027: 11 Plans, County by County

DENVER — For the 2027 plan year, Aetna (grouped by the Centers for Medicare & Medicaid Services as Aetna (CVS Health)) is offering 11 Medicare Advantage plans across Colorado, according to the CMS Medicare Advantage Landscape Source File for CY2027. Those 11 plans are part of a wider statewide field: 10 other carriers also offer Medicare Advantage in Colorado next year, for a combined total of 104 plans counted once each. This article is published by an independent Medicare education site; it is not the government and not affiliated with Aetna or any other carrier.

How many Aetna Medicare Advantage plans are offered in Colorado for 2027?

Aetna is offering 11 Medicare Advantage plans in Colorado for the 2027 plan year, per the CMS CY2027 Landscape file. The mix is 7 HMOs and 4 PPOs. Ten of the 11 plans include Part D prescription drug coverage, and one plan — a PPO — is offered without drug coverage.

Four of those 11 plans are Special Needs Plans: 3 Dual Eligible Special Needs Plans (D-SNPs) for people who have both Medicare and Medicaid, and 1 Chronic Condition Special Needs Plan (C-SNP) for people living with certain qualifying conditions. Aetna lists no Institutional SNPs (I-SNPs) in Colorado for 2027. Statewide, Aetna is one of 11 carriers offering Medicare Advantage in Colorado, with 104 plans across all carriers combined when each plan is counted once.

A reminder about geography: Medicare Advantage plans are sold county by county, so a plan listed on the statewide roster may or may not be available where you live.

Which Aetna Medicare Advantage plans cover the most Colorado counties in 2027?

The Aetna plan with the widest county footprint in Colorado for 2027 is Aetna Medicare Eagle (PPO), offered in 17 counties, followed by Aetna Medicare Value Care (PPO) in 16 counties. Three D-SNPs — Aetna Medicare Dual Extra Care (HMO D-SNP), Aetna Medicare Full Dual Care (HMO D-SNP), and the new Aetna Medicare Full Dual Extra Care (HMO D-SNP) — are each offered in 14 counties.

Other 2027 Aetna plans include two Aetna Medicare Signature (PPO) offerings (6 and 5 counties), two Aetna Medicare Signature (HMO) offerings (5 counties each), Aetna Medicare Prime (HMO) in 5 counties, and Aetna Medicare Chronic Care (HMO C-SNP), the C-SNP, in 4 counties. The full plan-by-plan list is rendered as a table elsewhere on this page.

Because county reach varies plan by plan, a Colorado reader comparing options should look up each plan name by county rather than by statewide total.

What is new or not returning from Aetna in Colorado for 2027?

Aetna has 5 plans new for 2027 in Colorado and 5 plans from 2026 that are not returning, based on the year-over-year comparison between the CMS CY2026 and CY2027 Landscape files. The new 2027 plans include Aetna Medicare Chronic Care (HMO C-SNP), Aetna Medicare Full Dual Extra Care (HMO D-SNP), Aetna Medicare Prime (HMO), and two Aetna Medicare Signature (HMO) plans.

If you are a current Aetna member in Colorado, the plan you have in 2026 may be among those not returning in 2027. Your Annual Notice of Change (ANOC), typically mailed by the end of September 2026, will tell you whether your specific plan is continuing, changing, or being discontinued. If a plan ends, members have Medicare rights to choose another plan during Annual Enrollment 2027 or a Special Enrollment Period.

How do I check whether an Aetna plan is offered in my Colorado county for 2027?

To check whether a specific Aetna plan is offered in your Colorado county for 2027 — and whether it covers your doctors and prescriptions — use the Medicare Plan Finder at medicare.gov or call 1-800-MEDICARE (TTY 1-877-486-2048), available 24 hours a day, 7 days a week. Enter your ZIP code, then your prescriptions and preferred pharmacies, to see plans available where you live.

Three details worth verifying for each plan before you decide:

• Service area: a plan listed statewide may not be offered in your county.
• Provider network: confirm your doctors, hospitals and specialists are in-network for the specific plan ID, using the plan's own provider directory.
• Drug formulary: confirm each prescription is on the plan's formulary and check the tier and any coverage rules in the plan's Evidence of Coverage.

Plan details — premiums, deductibles, copays, benefits, networks, formularies and star ratings — come from the Medicare Plan Finder, 1-800-MEDICARE, or the plan's own Evidence of Coverage and directories. This article does not list them.

What should Colorado Medicare shoppers do before December 7, 2026?

The Annual Enrollment Period for Medicare Advantage and Part D runs October 15 – December 7, 2026, and the plan you choose during that window takes effect January 1, 2027. There are a few steps you can take at your own pace:

• Read your 2027 Annual Notice of Change if you have a current plan, so you know what is changing.
• Make a short list of your doctors, pharmacies and prescriptions before you compare plans.
• Use the Medicare Plan Finder at medicare.gov to compare 2027 plans in your county across all carriers, not just one.
• If you want to switch, enroll by December 7, 2026 for a January 1, 2027 effective date.

Nothing requires you to act before you are ready, but the December 7, 2026 deadline is a fixed date on the Medicare calendar.

Where can Coloradans get free help comparing Medicare Advantage plans for 2027?

Two free, official sources are available to every Colorado Medicare beneficiary. Medicare.gov hosts the Plan Finder, enrollment tools, and plain-language explanations of enrollment periods and rights. The 1-800-MEDICARE line (TTY 1-877-486-2048) is staffed 24 hours a day, 7 days a week and can help you compare plans, confirm a plan's service area, and enroll.

The Social Security Administration (ssa.gov or 1-800-772-1213) handles Medicare enrollment itself and the Part D Extra Help program for people with limited income.