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Free tool · plan year 2027

Colorado — plan year 2027

Every county in this state, with the plans that were available for 2026 and do not appear in the federal 2027 landscape file.

Counties, sorted by share of enrollment in plans not in the 2027 file

CountyNot in the 2027 fileAvailable for 2026Share of enrollmentFlag
Eagle2485.2%High share of enrollment in plans not in the 2027 file
Summit41271.8%High share of enrollment in plans not in the 2027 file
Las Animas102568.1%High share of enrollment in plans not in the 2027 file
Rio Grande4960.9%High share of enrollment in plans not in the 2027 file
Phillips2658.5%High share of enrollment in plans not in the 2027 file
Alamosa71457.7%High share of enrollment in plans not in the 2027 file
Clear Creek225855.1%High share of enrollment in plans not in the 2027 file
Archuleta91849.5%High share of enrollment in plans not in the 2027 file
Montezuma3946.3%High share of enrollment in plans not in the 2027 file
Lake51446.0%High share of enrollment in plans not in the 2027 file
Yuma2645.0%High share of enrollment in plans not in the 2027 file
Morgan122842.6%High share of enrollment in plans not in the 2027 file
Chaffee42040.6%High share of enrollment in plans not in the 2027 file
Elbert195340.0%High share of enrollment in plans not in the 2027 file
Washington113437.0%High share of enrollment in plans not in the 2027 file
Conejos92935.1%High share of enrollment in plans not in the 2027 file
Grand93534.4%High share of enrollment in plans not in the 2027 file
Gilpin174829.2%High share of enrollment in plans not in the 2027 file
Custer103327.4%High share of enrollment in plans not in the 2027 file
Lincoln93123.9%High share of enrollment in plans not in the 2027 file
Huerfano103323.3%High share of enrollment in plans not in the 2027 file
La Plata72021.9%High share of enrollment in plans not in the 2027 file
Montrose41919.3%High share of enrollment in plans not in the 2027 file
Delta113118.7%High share of enrollment in plans not in the 2027 file
Saguache72618.5%High share of enrollment in plans not in the 2027 file
Park154617.4%High share of enrollment in plans not in the 2027 file
Logan51417.3%High share of enrollment in plans not in the 2027 file
Ouray31716.9%High share of enrollment in plans not in the 2027 file
Mesa103316.7%High share of enrollment in plans not in the 2027 file
San Miguel31111.2%High share of enrollment in plans not in the 2027 file
Larimer145710.7%High share of enrollment in plans not in the 2027 file
Weld166010.5%High share of enrollment in plans not in the 2027 file
Crowley10346.5%—
Gunnison3176.4%—
Boulder13696.2%—
Teller15565.8%—
Douglas16705.2%—
Rio Blanco3114.9%—
Broomfield12673.3%—
Otero3123.3%—
Pueblo13573.2%—
El Paso12563.1%—
Denver12712.5%—
Fremont9522.5%—
Arapahoe11682.2%—
Jefferson12722.1%—
Adams11711.9%—
Jackson10310.0%—
Bent3220.0%—
Costilla3230.0%—
Dolores3110.0%—
Hinsdale3170.0%—
Mineral3170.0%—
San Juan317not available—
Baca020.0%—
Cheyenne04not available—
Garfield020.0%—
Kiowa040.0%—
Kit Carson040.0%—
Moffat020.0%—
Pitkin080.0%—
Prowers040.0%—
Routt040.0%—
Sedgwick040.0%—

Source: CMS, CY2027 Medicare Advantage and Part D Landscape Source File (PY2027, retrieved October 3, 2026) and Monthly Enrollment by CPSC, September 2026.

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Where these numbers come from

Plan year
2027
Source file
CMS Medicare Advantage and Part D Landscape Source File, and Monthly Enrollment by CPSC
File vintage
PY2027
Retrieved
October 3, 2026
Enrollment as of
September 2026

Source: CMS, CY2027 Medicare Advantage and Part D Landscape Source File (PY2027, retrieved October 3, 2026) and Monthly Enrollment by CPSC, September 2026.

What this does not tell you

  1. 01

    Why a plan is missing from the 2027 file. A second federal file explains that, and it posts after the landscape file.

  2. 02

    Whether a plan's members will be moved to another plan automatically. That is in the same second file.

  3. 03

    What any plan will cost for 2027, what its network will be, or which plan any individual should choose. This is not plan-shopping advice.

  4. 04

    Exact enrollment. Cells below the federal publication floor of 11 are not published, so every count here is a floor and undercounts small rural counties most.

Beyond one county

Plan availability is one number a payer changes without telling you.

In Network watches payer medical policy, coding rules and contracted rates for hospitals and practices, and tells you the day something moves.

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Before you use this page

In Network is not affiliated with, endorsed by, or acting on behalf of the Centers for Medicare & Medicaid Services, the U.S. Department of Health and Human Services, or any government agency.

This page is a summary of public CMS files. It is not advice about which plan anyone should choose, and it is not a plan comparison.

Plan availability can change. Verify any plan's status at medicare.gov or by calling 1-800-MEDICARE (1-800-633-4227), TTY 1-877-486-2048.

If you are looking at this because of your own coverage, medicare.gov and the number above are the right places to get an answer about it.

Source: Centers for Medicare & Medicaid Services, CY2027 Medicare Advantage and Part D Landscape Source File and Monthly Enrollment by CPSC, retrieved October 3, 2026.

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