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Medicare Advantage Enrollment Tracker · Maine

Medicare Advantage Enrollment in Maine

Maine had 230,715 Medicare Advantage members in September 2026, by the CMS county file, which includes employer group plans. That is up 1.4% from Sep 2025, slower than the national 2.0%. Maine ranks 37th by members and holds 0.6% of the national total.

Martin's Point Health Care leads with 28.8% of members who have a carrier label (contract file, September 2026). Among individual plans, which leave out employer group coverage, enrollment is up 1.4% 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.

Maine at a glance

Medicare Advantage members

230,715

Maine members by month: from 197K in Jan 2023 to 231K in Sep 2026

County file · Sep 2026. Includes employer group plans. Rank: 37.

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

+1.4%

up 1.4 percent vs Sep 2025

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

Share of national total

0.6%

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

Individual plan members

199,592

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

Martin's Point Health Care

28.8% of members with a carrier label. Contract file · Sep 2026.

Maine members by month

Medicare Advantage members in Maine

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 MaineLine chart, January 2023 to September 2026. Maine: 231K in September 2026. Shaded bands mark months with no data.190K200K210K220K230K240K2023202420252026Maine231K
Medicare Advantage members in MaineLine chart, January 2023 to September 2026. Maine: 231K in September 2026. Shaded bands mark months with no data.190K200K210K220K230K240K20232025Maine231K
  • Maine
  • Shaded: no data that month
View the data table
Medicare Advantage members in Maine: values by month
MonthMaine
Sep 2026231K
Aug 2026231K
Jul 2026230K
Jun 2026230K
May 2026230K
Apr 2026229K
Mar 2026229K
Feb 2026228K
Jan 2026222K
Dec 2025228K
Nov 2025228K
Oct 2025228K
Sep 2025228K
Aug 2025227K
Jul 2025226K
Jun 2025226K
May 2025225K
Apr 2025225K
Mar 2025224K
Feb 2025224K
Jan 2025222K
Dec 2024220K
Nov 2024220K
Oct 2024219K
Sep 2024219K
Aug 2024218K
Jul 2024217K
Jun 2024217K
May 2024217K
Apr 2024215K
Mar 2024214K
Feb 2024213K
Jan 2024213K
Dec 2023–
Nov 2023208K
Oct 2023207K
Sep 2023206K
Aug 2023205K
Jul 2023–
Jun 2023203K
May 2023203K
Apr 2023201K
Mar 2023201K
Feb 2023200K
Jan 2023197K

County file · Sep 2026. Employer group plans included.

Maine 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.
Maine and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Maine: 117.1 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.1001051101151202023202420252026National117.8Maine117.1
Maine and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Maine: 117.1 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.10010511011512020232025National117.8Maine117.1
  • Maine
  • National (same jurisdictions each month)
  • Shaded: no data that month
View the data table
Maine and the nation, Jan 2023 = 100: values by month
MonthMaineNational (same jurisdictions each month)
Sep 2026117.1117.8
Aug 2026117.1117.8
Jul 2026116.9117.5
Jun 2026116.7117.4
May 2026116.6117.2
Apr 2026116.3116.9
Mar 2026116.1116.7
Feb 2026115.7116.3
Jan 2026112.6114.7
Dec 2025115.9115.9
Nov 2025115.9115.9
Oct 2025115.7115.7
Sep 2025115.5115.5
Aug 2025115.2115.3
Jul 2025114.8115
Jun 2025114.7114.8
May 2025114.4114.4
Apr 2025114.2114.2
Mar 2025114113.8
Feb 2025113.6113.4
Jan 2025112.6111.9
Dec 2024111.8112
Nov 2024111.7112
Oct 2024111.4111.7
Sep 2024111111.5
Aug 2024110.6111.2
Jul 2024110.3110.9
Jun 2024110110.7
May 2024110.1110.5
Apr 2024109110
Mar 2024108.7109.7
Feb 2024108.4109.3
Jan 2024107.9108.7
Dec 2023––
Nov 2023105.5105.9
Oct 2023105.2105.6
Sep 2023104.7105.2
Aug 2023104.2104.9
Jul 2023––
Jun 2023103.2104.1
May 2023102.8103.8
Apr 2023102.3103.4
Mar 2023101.9103
Feb 2023101.4102.2
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 Maine

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.

Martin's Point Health Care leads with 28.8% of members who have a carrier label (contract file, September 2026).

Martin's Point Health Care lost 3.0 points in 12 months; most of that change came in January 2026.

Humana gained 4.1 points in 12 months; most of that change came in January 2026.

UnitedHealthcare and Humana together hold 34.2%, up 5.0 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. Martin's Point Health Care: 31.7% to 28.8%; UnitedHealthcare: 22.0% to 22.9%; Aetna/CVS: 16.2% to 16.2%; Elevance/Anthem: 13.4% to 11.5%; Humana: 7.3% to 11.3%; Centene/Wellcare: 9.3% to 9.1%.Sep 2025Sep 2026Martin's 31.7%28.8% Martin'sUnitedHealthcare 22.0%22.9% UnitedHealthcareAetna/CVS 16.2%16.2% Aetna/CVSElevance/Anthem 13.4%11.5% Elevance/AnthemHumana 7.3%11.3% HumanaCentene/Wellcare 9.3%9.1% Centene/Wellcare
Carrier share, Sep 2025 to Sep 2026Slope chart comparing Sep 2025 with Sep 2026. Martin's Point Health Care: 31.7% to 28.8%; UnitedHealthcare: 22.0% to 22.9%; Aetna/CVS: 16.2% to 16.2%; Elevance/Anthem: 13.4% to 11.5%; Humana: 7.3% to 11.3%; Centene/Wellcare: 9.3% to 9.1%.Sep 2025Sep 2026Martin's 31.7%28.8%UHC 22.0%22.9%Aetna 16.2%16.2%Elevance 13.4%11.5%Humana 7.3%11.3%Centene 9.3%9.1%
View the data table
Carrier share, Sep 2025 to Sep 2026: Sep 2025 and Sep 2026
NameSep 2025Sep 2026Change
Martin's Point Health Care31.7%28.8%−3.0 pts
UnitedHealthcare22.0%22.9%+0.9 pts
Aetna/CVS16.2%16.2%0.0 pts
Elevance/Anthem13.4%11.5%−1.9 pts
Humana7.3%11.3%+4.1 pts
Centene/Wellcare9.3%9.1%−0.2 pts

Contract file · Sep 2026. Employer group plans included.

Carrier share of Medicare Advantage members with a carrier label, Maine, September 2026
CarrierShare, Sep 2026Share, Sep 2025ChangeMembers
Martin's Point Health Care28.8%31.7%−3.0 pts66,133
UnitedHealthcare22.9%22.0%+0.9 pts52,582
Aetna/CVS16.2%16.2%0.0 pts37,335
Elevance/Anthem11.5%13.4%−1.9 pts26,435
Humana11.3%7.3%+4.1 pts26,083
Centene/Wellcare9.1%9.3%−0.2 pts20,935
HCSC/BCBS0.1%0.1%0.0 pts302
BCBS Michigan0.0%0.0%0.0 pts74
BCBS Massachusetts0.0%0.0%0.0 pts30
Highmark/BCBS0.0%0.0%0.0 pts26
All other carriers0.0%––0

Insurer not assigned in CMS data: 0.0% of all members in Sep 2026, 0.1% 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 Maine

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 Maine by individual Medicare Advantage members, September 2026
CountyMembers12-month changeLeading carrierLeader's share
Cumberland40,967+1.4%Martin's Point Health Care44.9%
York28,925+2.3%Martin's Point Health Care29.2%
Penobscot20,766+0.7%UnitedHealthcare29.4%
Kennebec18,033+1.7%Martin's Point Health Care30.6%
Androscoggin16,467+0.8%Martin's Point Health Care39.1%
Oxford10,266+1.9%UnitedHealthcare33.5%
Aroostook9,729+0.9%Centene/Wellcare49.2%
Somerset8,640+1.2%Elevance/Anthem28.8%
Hancock7,789+0.2%Martin's Point Health Care46.7%
Waldo6,583+1.6%Martin's Point Health Care32.6%

Browse all counties.

Common questions

How many people have Medicare Advantage in Maine?

Maine had 230,715 members in September 2026, by the CMS county file (employer group plans included). Individual plans, which leave out employer group coverage, had 199,592 members in September 2026.

Is Medicare Advantage growing in Maine?

Enrollment is up 1.4% from Sep 2025 to Sep 2026, slower than the national 2.0%. Among individual plans, which leave out employer group coverage, enrollment is up 1.4% in the 12 months to September 2026.

Which carrier has the most Medicare Advantage members in Maine?

Martin's Point Health Care leads with 28.8% of members who have a carrier label (contract file, September 2026). UnitedHealthcare and Humana together hold 34.2%, up 5.0 points from Sep 2025. 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 Maine, data as of September 2026. Source: CMS public enrollment files. https://www.seniordealclub.com/medicare-advantage/enrollment/states/maine

Download Maine 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