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Medicare Advantage Enrollment Tracker · Wyoming

Medicare Advantage Enrollment in Wyoming

Wyoming had 19,691 Medicare Advantage members in September 2026, by the CMS county file, which includes employer group plans. That is down 21.6% from Sep 2025, while the nation grew 2.0%. Wyoming ranks 50th by members and holds 0.1% of the national total.

UnitedHealthcare leads with 48.3% of members who have a carrier label (contract file, September 2026). Among individual plans, which leave out employer group coverage, enrollment is down 26.2% in the 12 months to September 2026.

By Senior Deal Club Standards Desk · Data as of September 2026 · Editorial policy

Data as ofCMS public files, monthly snapshot

  • These totals include employer and union group plans.
    Why this matters

    The CMS contract and county files count group plans that retirees get through a former employer. They are not plans you can pick on your own. Counts here are larger than the individual-plan counts on county pages.

  • Some months are missing from the source.
    Why this matters

    CMS did not publish every month. Lines break at a missing month instead of guessing a value. A dotted line, where shown, only joins the two sides.

Wyoming at a glance

Medicare Advantage members

19,691

Wyoming members by month: from 13.5K in Jan 2023 to 19.7K in Sep 2026

County file · Sep 2026. Includes employer group plans. Rank: 50.

County file · Sep 2026
CMS state, county and plan-type file (SCP). The same plans split by state and county, with employer and union group plans included. CMS hides counts of 10 or fewer.

12-month change

-21.6%

down 21.6 percent vs Sep 2025

County file · Sep 2026. National: +2.0%.

Share of national total

0.1%

County file · Sep 2026. Of jurisdictions that report every month.

Individual plan members

15,686

Individual MA · Sep 2026. Employer group plans left out.

Individual MA · Sep 2026
Individual Medicare Advantage plans (IND), from county data. Employer and union group plans are left out, so counts are smaller than in the other two files.

Largest carrier

UnitedHealthcare

48.3% of members with a carrier label. Contract file · Sep 2026.

Wyoming members by month

Medicare Advantage members in Wyoming

Members, by month.

County file · Sep 2026
CMS state, county and plan-type file (SCP). The same plans split by state and county, with employer and union group plans included. CMS hides counts of 10 or fewer.
Medicare Advantage members in WyomingLine chart, January 2023 to September 2026. Wyoming: 19.7K in September 2026. Shaded bands mark months with no data.10K15K20K25K30K2023202420252026Wyoming19.7K
Medicare Advantage members in WyomingLine chart, January 2023 to September 2026. Wyoming: 19.7K in September 2026. Shaded bands mark months with no data.10K15K20K25K30K20232025Wyoming19.7K
  • Wyoming
  • Shaded: no data that month
View the data table
Medicare Advantage members in Wyoming: values by month
MonthWyoming
Sep 202619.7K
Aug 202619.7K
Jul 202619.7K
Jun 202619.7K
May 202619.7K
Apr 202619.7K
Mar 202619.6K
Feb 202619.3K
Jan 202617.9K
Dec 202525.1K
Nov 202525.1K
Oct 202525.1K
Sep 202525.1K
Aug 202525.1K
Jul 202525K
Jun 202525K
May 202524.9K
Apr 202524.8K
Mar 202524.7K
Feb 202524.5K
Jan 202524.2K
Dec 202423.1K
Nov 202422.9K
Oct 202422.7K
Sep 202422.5K
Aug 202422.3K
Jul 202422.2K
Jun 202422K
May 202421.7K
Apr 202421.4K
Mar 202421.2K
Feb 202421K
Jan 202420.8K
Dec 2023–
Nov 202316.5K
Oct 202316.4K
Sep 202316.1K
Aug 202315.9K
Jul 2023–
Jun 202315.5K
May 202315.3K
Apr 202315.1K
Mar 202314.9K
Feb 202314.7K
Jan 202313.5K

County file · Sep 2026. Employer group plans included.

Wyoming and the nation, Jan 2023 = 100

Each line is members divided by members in the start month, times 100.

County file · Sep 2026
CMS state, county and plan-type file (SCP). The same plans split by state and county, with employer and union group plans included. CMS hides counts of 10 or fewer.
Wyoming and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Wyoming: 145.4 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.1001502002023202420252026Wyoming145.4National117.8
Wyoming and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Wyoming: 145.4 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.10015020020232025Wyoming145.4National117.8
  • Wyoming
  • National (same jurisdictions each month)
  • Shaded: no data that month
View the data table
Wyoming and the nation, Jan 2023 = 100: values by month
MonthWyomingNational (same jurisdictions each month)
Sep 2026145.4117.8
Aug 2026145.4117.8
Jul 2026145.5117.5
Jun 2026145.6117.4
May 2026145.6117.2
Apr 2026145.4116.9
Mar 2026144.9116.7
Feb 2026142.8116.3
Jan 2026132.1114.7
Dec 2025185.2115.9
Nov 2025185.6115.9
Oct 2025185.7115.7
Sep 2025185.6115.5
Aug 2025185.7115.3
Jul 2025184.9115
Jun 2025184.4114.8
May 2025183.7114.4
Apr 2025183.3114.2
Mar 2025182.7113.8
Feb 2025181.3113.4
Jan 2025178.4111.9
Dec 2024170.3112
Nov 2024168.9112
Oct 2024167.6111.7
Sep 2024166.2111.5
Aug 2024164.8111.2
Jul 2024163.7110.9
Jun 2024162.2110.7
May 2024160110.5
Apr 2024158.2110
Mar 2024156.9109.7
Feb 2024155.4109.3
Jan 2024153.9108.7
Dec 2023––
Nov 2023122.2105.9
Oct 2023120.9105.6
Sep 2023118.8105.2
Aug 2023117.6104.9
Jul 2023––
Jun 2023114.4104.1
May 2023113.2103.8
Apr 2023111.3103.4
Mar 2023110.1103
Feb 2023108.7102.2
Jan 2023100100

County file · Sep 2026. National line sums the jurisdictions that report in every month.

Individual plans

Individual plans leave out employer and union group coverage, so counts are smaller than in the county file.

Carrier share in Wyoming

Share of members whose contract has a carrier label, September 2026 against September 2025.

Contract file · Sep 2026
CMS contract file (SCC). All Medicare Advantage contracts, with employer and union group plans included. It still lists Connecticut and Alaska.

UnitedHealthcare leads with 48.3% of members who have a carrier label (contract file, September 2026).

UnitedHealthcare lost 42.7 points in 12 months; most of that change came in January 2026.

Humana gained 8.6 points in 12 months; most of that change came in January 2026.

UnitedHealthcare and Humana together hold 60.4%, down 34.1 points from Sep 2025.

The market is less concentrated than a year earlier (direction only; the level depends on how carriers are grouped).

Carrier share, Sep 2025 to Sep 2026

Percent of members with a carrier label. Largest carriers.

Carrier share, Sep 2025 to Sep 2026Slope chart comparing Sep 2025 with Sep 2026. UnitedHealthcare: 91.0% to 48.3%; BCBS Michigan: – to 34.7%; Humana: 3.4% to 12.0%; Aetna/CVS: 4.7% to 4.5%; Elevance/Anthem: 0.3% to 0.4%; Medica: 0.5% to –.Sep 2025Sep 2026UnitedHealthcare 91.0%48.3% UnitedHealthcare34.7% BCBS MichiganHumana 3.4%12.0% HumanaAetna/CVS 4.7%4.5% Aetna/CVSElevance/Anthem 0.3%0.4% Elevance/AnthemMedica 0.5%
Carrier share, Sep 2025 to Sep 2026Slope chart comparing Sep 2025 with Sep 2026. UnitedHealthcare: 91.0% to 48.3%; BCBS Michigan: – to 34.7%; Humana: 3.4% to 12.0%; Aetna/CVS: 4.7% to 4.5%; Elevance/Anthem: 0.3% to 0.4%; Medica: 0.5% to –.Sep 2025Sep 2026UHC 91.0%48.3%34.7%Humana 3.4%12.0%Aetna 4.7%4.5%Elevance 0.3%0.4%Medica 0.5%
View the data table
Carrier share, Sep 2025 to Sep 2026: Sep 2025 and Sep 2026
NameSep 2025Sep 2026Change
UnitedHealthcare91.0%48.3%−42.7 pts
BCBS Michigan–34.7%–
Humana3.4%12.0%+8.6 pts
Aetna/CVS4.7%4.5%−0.2 pts
Elevance/Anthem0.3%0.4%+0.1 pts
Medica0.5%––

Contract file · Sep 2026. Employer group plans included.

Carrier share of Medicare Advantage members with a carrier label, Wyoming, September 2026
CarrierShare, Sep 2026Share, Sep 2025ChangeMembers
UnitedHealthcare48.3%91.0%−42.7 pts9,133
BCBS Michigan34.7%––6,562
Humana12.0%3.4%+8.6 pts2,271
Aetna/CVS4.5%4.7%−0.2 pts857
Elevance/Anthem0.4%0.3%+0.1 pts68
All other carriers0.0%––0
Medica–0.5%––

Insurer not assigned in CMS data: 1.6% of all members in Sep 2026, 0.4% in Sep 2025. Shares leave these members out. Contract IDs are renumbered each January, so this page follows carriers, not contracts. A contract that serves several states carries one carrier label, so a carrier can appear in a state where it is not a local plan. See the carrier view for the whole nation.

Biggest counties in Wyoming

Individual plan members and the 12-month change for each county, from county data.

Individual MA · Sep 2026
Individual Medicare Advantage plans (IND), from county data. Employer and union group plans are left out, so counts are smaller than in the other two files.
Biggest counties in Wyoming by individual Medicare Advantage members, September 2026
CountyMembers12-month changeLeading carrierLeader's share
Laramie4,484+3.4%UnitedHealthcare85.1%
Natrona2,977−2.4%UnitedHealthcare94.4%
Uinta959−35.2%BCBS Michigan80.1%
Sweetwater748−38.9%BCBS Michigan100.0%
Fremont670−52.1%BCBS Michigan100.0%
Albany617−39.0%BCBS Michigan53.3%
Goshen602−28.1%BCBS Michigan62.6%
Sheridan579−3.8%UnitedHealthcare100.0%
Park569−46.4%Humana56.2%
Campbell551−53.0%BCBS Michigan100.0%

Browse all counties.

Common questions

How many people have Medicare Advantage in Wyoming?

Wyoming had 19,691 members in September 2026, by the CMS county file (employer group plans included). Individual plans, which leave out employer group coverage, had 15,686 members in September 2026.

Is Medicare Advantage growing in Wyoming?

Enrollment is down 21.6% from Sep 2025 to Sep 2026, while the nation grew 2.0%. Among individual plans, which leave out employer group coverage, enrollment is down 26.2% in the 12 months to September 2026.

Which carrier has the most Medicare Advantage members in Wyoming?

UnitedHealthcare leads with 48.3% of members who have a carrier label (contract file, September 2026). UnitedHealthcare and Humana together hold 60.4%, down 34.1 points from Sep 2025. Shares leave out members whose contract has no carrier label: 1.6% of members.

Cite and download

Cite this page

Senior Deal Club Standards Desk. Medicare Advantage Enrollment in Wyoming, data as of September 2026. Source: CMS public enrollment files. https://www.seniordealclub.com/medicare-advantage/enrollment/states/wyoming

Download Wyoming CSV

Data: CMS public enrollment files, in a monthly snapshot processed by TapQuality. Senior Deal Club is not affiliated with Medicare or any government agency.

These pages are educational. They are not plan advice. How the numbers are built · Editorial policy