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Medicare Advantage Enrollment Tracker · Guam

Medicare Advantage Enrollment in Guam

Guam had 42 Medicare Advantage members in September 2026, by the CMS county file, which includes employer group plans. That is up 5.0% from Sep 2025, faster than the national 2.0%. Guam holds 0.0% of the national total.

Aetna/CVS leads with 100.0% of members who have a carrier label (contract file, November 2024).

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.

Guam at a glance

Medicare Advantage members

42

Guam members by month: from 56 in Jan 2023 to 42 in Sep 2026

County file · Sep 2026. Includes employer group plans.

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

+5.0%

up 5.0 percent vs Sep 2025

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

Share of national total

0.0%

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

Largest carrier

Aetna/CVS

100.0% of members with a carrier label. Contract file · Nov 2024.

Guam members by month

Medicare Advantage members in Guam

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 GuamLine chart, January 2023 to September 2026. Guam: 42 in September 2026. Shaded bands mark months with no data.30405060702023202420252026Guam42
Medicare Advantage members in GuamLine chart, January 2023 to September 2026. Guam: 42 in September 2026. Shaded bands mark months with no data.304050607020232025Guam42
  • Guam
  • Shaded: no data that month
View the data table
Medicare Advantage members in Guam: values by month
MonthGuam
Sep 202642
Aug 202636
Jul 202642
Jun 202638
May 202638
Apr 202637
Mar 202642
Feb 202639
Jan 202645
Dec 202541
Nov 202539
Oct 202537
Sep 202540
Aug 202540
Jul 202540
Jun 202538
May 202542
Apr 202544
Mar 202546
Feb 202542
Jan 202549
Dec 202451
Nov 202451
Oct 202457
Sep 202458
Aug 202459
Jul 202457
Jun 202457
May 202452
Apr 202456
Mar 202457
Feb 202461
Jan 202465
Dec 2023–
Nov 202356
Oct 202356
Sep 202352
Aug 202358
Jul 2023–
Jun 202362
May 202354
Apr 202361
Mar 202359
Feb 202361
Jan 202356

County file · Sep 2026. Employer group plans included.

Guam 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.
Guam and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Guam: 75 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.60801001202023202420252026National117.8Guam75
Guam and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Guam: 75 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.608010012020232025National117.8Guam75
  • Guam
  • National (same jurisdictions each month)
  • Shaded: no data that month
View the data table
Guam and the nation, Jan 2023 = 100: values by month
MonthGuamNational (same jurisdictions each month)
Sep 202675117.8
Aug 202664.3117.8
Jul 202675117.5
Jun 202667.9117.4
May 202667.9117.2
Apr 202666.1116.9
Mar 202675116.7
Feb 202669.6116.3
Jan 202680.4114.7
Dec 202573.2115.9
Nov 202569.6115.9
Oct 202566.1115.7
Sep 202571.4115.5
Aug 202571.4115.3
Jul 202571.4115
Jun 202567.9114.8
May 202575114.4
Apr 202578.6114.2
Mar 202582.1113.8
Feb 202575113.4
Jan 202587.5111.9
Dec 202491.1112
Nov 202491.1112
Oct 2024101.8111.7
Sep 2024103.6111.5
Aug 2024105.4111.2
Jul 2024101.8110.9
Jun 2024101.8110.7
May 202492.9110.5
Apr 2024100110
Mar 2024101.8109.7
Feb 2024108.9109.3
Jan 2024116.1108.7
Dec 2023––
Nov 2023100105.9
Oct 2023100105.6
Sep 202392.9105.2
Aug 2023103.6104.9
Jul 2023––
Jun 2023110.7104.1
May 202396.4103.8
Apr 2023108.9103.4
Mar 2023105.4103
Feb 2023108.9102.2
Jan 2023100100

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

Carrier share in Guam

Share of members whose contract has a carrier label, November 2024 against November 2023.

Contract file · Nov 2024
CMS contract file (SCC). All Medicare Advantage contracts, with employer and union group plans included. It still lists Connecticut and Alaska.

Aetna/CVS leads with 100.0% of members who have a carrier label (contract file, November 2024).

UnitedHealthcare and Humana together hold 0.0%, about the same as in Nov 2023.

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

Carrier share, Nov 2023 to Nov 2024

Percent of members with a carrier label. Largest carriers.

Carrier share, Nov 2023 to Nov 2024Slope chart comparing Nov 2023 with Nov 2024. Aetna/CVS: 100.0% to 100.0%.Nov 2023Nov 2024Aetna/CVS 100.0%100.0% Aetna/CVS
Carrier share, Nov 2023 to Nov 2024Slope chart comparing Nov 2023 with Nov 2024. Aetna/CVS: 100.0% to 100.0%.Nov 2023Nov 2024Aetna 100.0%100.0%
View the data table
Carrier share, Nov 2023 to Nov 2024: Nov 2023 and Nov 2024
NameNov 2023Nov 2024Change
Aetna/CVS100.0%100.0%0.0 pts

Contract file · Nov 2024. Employer group plans included.

Carrier share of Medicare Advantage members with a carrier label, Guam, November 2024
CarrierShare, Nov 2024Share, Nov 2023ChangeMembers
Aetna/CVS100.0%100.0%0.0 pts11
All other carriers0.0%––0

Insurer not assigned in CMS data: 0.0% of all members in Nov 2024, 0.0% in Nov 2023. 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.

Common questions

How many people have Medicare Advantage in Guam?

Guam had 42 members in September 2026, by the CMS county file (employer group plans included).

Is Medicare Advantage growing in Guam?

Enrollment is up 5.0% from Sep 2025 to Sep 2026, faster than the national 2.0%.

Which carrier has the most Medicare Advantage members in Guam?

Aetna/CVS leads with 100.0% of members who have a carrier label (contract file, November 2024). UnitedHealthcare and Humana together hold 0.0%, about the same as in Nov 2023. Shares leave out members whose contract has no carrier label: 0.0% of members.

Cite and download

Cite this page

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

Download Guam 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