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Medicare Advantage plans changing or leaving Colorado counties for 2027

Across 64 Colorado counties, 705 Medicare Advantage plans are leaving for 2027 and 488 are changing. Pick your county for its numbers.

705Leavingoffered last year, not this year
488Changingoffered both years, listing differs
1,193Totalplans leaving or changing
These counts come from comparing the two official CMS Medicare Advantage Landscape files for 2026 and 2027. A plan counts as leaving when it was offered in the county for 2026 and is not offered there for 2027. A plan counts as changing when it is offered in both years but its 2027 listing differs on something a member would notice: the premium, the drug deductible, the plan type, or the plan name. Only the counts are shown here. This page does not name plans, list premiums or benefits, or recommend anything.
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2027 PLAN ALERT

Medicare Advantage plans in your area are changing or leaving for 2027.

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Annual Enrollment: Oct 15 – Dec 7

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BEFORE YOU ENROLL

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  • Your doctors — confirmed in-network for 2027
  • Your prescriptions — checked against the plan's 2027 drug tiers
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Colorado counties, most changes first

CountyLeavingChangingTotal
Clear Creek County311344
Douglas County241943
Denver County182240
Jefferson County182240
Adams County172239
Elbert County261339
Arapahoe County172138
Boulder County191938
Weld County221638
Broomfield County181937
Teller County231437
Gilpin County231235
Larimer County201434
Park County211233
Pueblo County191433
El Paso County181432
Fremont County151328
Delta County18725
Morgan County18725
Crowley County16824
Washington County17724
Custer County16723
Huerfano County16723
Mesa County15823
Conejos County14822
Grand County15722
Jackson County16521
Lincoln County14721
Las Animas County13417
Archuleta County13316
Saguache County11516
Alamosa County11314
Costilla County5813
La Plata County11213
Montrose County8513
Bent County5712
Chaffee County8412
Lake County7512
Logan County6612
Gunnison County5510
Hinsdale County5510
Mineral County5510
Otero County4610
Ouray County5510
San Juan County5510
Summit County6410
Dolores County549
Rio Blanco County549
Rio Grande County819
San Miguel County549
Montezuma County628
Phillips County336
Yuma County336
Cheyenne County134
Eagle County314
Kiowa County134
Kit Carson County134
Prowers County134
Sedgwick County134
Pitkin County123
Routt County123
Baca County112
Garfield County112
Moffat County112

What to do before December 7

If you are in a Medicare Advantage plan today, your plan must send you an Annual Notice of Change by September 30 that spells out exactly what is different for 2027. Read it before the Annual Enrollment Period, which runs October 15 through December 7.

If your plan is leaving your county, you will get a separate notice and a Special Enrollment Period to choose new coverage. If you do nothing, you may be returned to Original Medicare without drug coverage, so it is worth acting during the window.

A licensed agent can check your doctors and prescriptions against the plans that will actually operate in your county next year. For unbiased help, contact Medicare.gov, 1-800-MEDICARE, or your State Health Insurance Assistance Program (SHIP).

Good to know

Frequently asked questions

Why do the numbers differ so much from county to county?
Medicare Advantage plans are approved county by county, so a plan can leave one county and stay in the next. Each county's count reflects only the plans approved for that county.
What does “changing” mean for 2027?
A plan offered in both 2026 and 2027 whose 2027 listing differs on premium, drug deductible, plan type, or plan name. The count is neutral: it does not say whether a change helps or hurts any particular member.
Do you list which plans are leaving?
No. We publish area-level counts only, never plan names, premiums or benefits. Your Annual Notice of Change, Medicare.gov, 1-800-MEDICARE, or a licensed agent can tell you about a specific plan.
Sources & further reading

For personalized answers, contact Medicare.gov, 1-800-MEDICARE, or your local SHIP.

Medicare plans in your area changing for 2027 — check yoursCall