Skip to main content
Senior Deal Club

Medicare Advantage Enrollment Tracker · Massachusetts

Medicare Advantage Enrollment in Massachusetts

Massachusetts had 542,576 Medicare Advantage members in September 2026, by the CMS county file, which includes employer group plans. That is up 0.6% from Sep 2025, slower than the national 2.0%. Massachusetts ranks 26th by members and holds 1.5% of the national total.

Point32Health leads with 23.3% of members who have a carrier label (contract file, September 2026). Among individual plans, which leave out employer group coverage, enrollment is up 1.6% 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.

Massachusetts at a glance

Medicare Advantage members

542,576

Massachusetts members by month: from 464K in Jan 2023 to 543K in Sep 2026

County file · Sep 2026. Includes employer group plans. Rank: 26.

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

+0.6%

up 0.6 percent vs Sep 2025

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

Share of national total

1.5%

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

Individual plan members

489,349

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

Point32Health

23.3% of members with a carrier label. Contract file · Sep 2026.

Massachusetts members by month

Medicare Advantage members in Massachusetts

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 MassachusettsLine chart, January 2023 to September 2026. Massachusetts: 543K in September 2026. Shaded bands mark months with no data.460K480K500K520K540K560K2023202420252026Massachusetts543K
Medicare Advantage members in MassachusettsLine chart, January 2023 to September 2026. Massachusetts: 543K in September 2026. Shaded bands mark months with no data.460K480K500K520K540K560K20232025Massachusetts543K
  • Massachusetts
  • Shaded: no data that month
View the data table
Medicare Advantage members in Massachusetts: values by month
MonthMassachusetts
Sep 2026543K
Aug 2026542K
Jul 2026542K
Jun 2026542K
May 2026542K
Apr 2026542K
Mar 2026541K
Feb 2026539K
Jan 2026525K
Dec 2025542K
Nov 2025541K
Oct 2025540K
Sep 2025539K
Aug 2025538K
Jul 2025537K
Jun 2025535K
May 2025534K
Apr 2025533K
Mar 2025532K
Feb 2025529K
Jan 2025522K
Dec 2024523K
Nov 2024523K
Oct 2024522K
Sep 2024521K
Aug 2024519K
Jul 2024517K
Jun 2024518K
May 2024518K
Apr 2024514K
Mar 2024513K
Feb 2024512K
Jan 2024510K
Dec 2023–
Nov 2023493K
Oct 2023491K
Sep 2023485K
Aug 2023484K
Jul 2023–
Jun 2023476K
May 2023475K
Apr 2023474K
Mar 2023471K
Feb 2023470K
Jan 2023464K

County file · Sep 2026. Employer group plans included.

Massachusetts 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.
Massachusetts and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Massachusetts: 117 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.1001051101151202023202420252026National117.8Massachusetts117
Massachusetts and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Massachusetts: 117 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.10010511011512020232025National117.8Massachusetts117
  • Massachusetts
  • National (same jurisdictions each month)
  • Shaded: no data that month
View the data table
Massachusetts and the nation, Jan 2023 = 100: values by month
MonthMassachusettsNational (same jurisdictions each month)
Sep 2026117117.8
Aug 2026116.9117.8
Jul 2026116.8117.5
Jun 2026116.9117.4
May 2026116.8117.2
Apr 2026116.8116.9
Mar 2026116.5116.7
Feb 2026116.2116.3
Jan 2026113.1114.7
Dec 2025116.8115.9
Nov 2025116.7115.9
Oct 2025116.5115.7
Sep 2025116.3115.5
Aug 2025116115.3
Jul 2025115.7115
Jun 2025115.4114.8
May 2025115.1114.4
Apr 2025114.9114.2
Mar 2025114.6113.8
Feb 2025113.9113.4
Jan 2025112.6111.9
Dec 2024112.7112
Nov 2024112.8112
Oct 2024112.6111.7
Sep 2024112.3111.5
Aug 2024111.8111.2
Jul 2024111.5110.9
Jun 2024111.6110.7
May 2024111.7110.5
Apr 2024110.8110
Mar 2024110.5109.7
Feb 2024110.3109.3
Jan 2024110108.7
Dec 2023––
Nov 2023106.3105.9
Oct 2023105.9105.6
Sep 2023104.6105.2
Aug 2023104.4104.9
Jul 2023––
Jun 2023102.7104.1
May 2023102.4103.8
Apr 2023102.1103.4
Mar 2023101.5103
Feb 2023101.3102.2
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 Massachusetts

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.

Point32Health leads with 23.3% of members who have a carrier label (contract file, September 2026).

Point32Health lost 2.4 points in 12 months; most of that change came in January 2026.

UnitedHealthcare lost 3.1 points in 12 months; most of that change came in January 2026.

UnitedHealthcare and Humana together hold 23.0%, down 2.6 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. Point32Health: 25.8% to 23.3%; UnitedHealthcare: 24.1% to 21.0%; BCBS Massachusetts: 20.0% to 16.2%; Aetna/CVS: 13.1% to 13.0%; CareSource: 3.4% to 8.4%; Fallon Community Health Plan: 4.4% to 4.1%.Sep 2025Sep 2026Point32Health 25.8%23.3% Point32HealthUnitedHealthcare 24.1%21.0% UnitedHealthcareBCBS Massachusetts 20.0%16.2% BCBS MassachusettsAetna/CVS 13.1%13.0% Aetna/CVSCareSource 3.4%8.4% CareSourceFallon 4.4%4.1% Fallon
Carrier share, Sep 2025 to Sep 2026Slope chart comparing Sep 2025 with Sep 2026. Point32Health: 25.8% to 23.3%; UnitedHealthcare: 24.1% to 21.0%; BCBS Massachusetts: 20.0% to 16.2%; Aetna/CVS: 13.1% to 13.0%; CareSource: 3.4% to 8.4%; Fallon Community Health Plan: 4.4% to 4.1%.Sep 2025Sep 2026Point32Health 25.8%23.3%UHC 24.1%21.0%Blue Cross 20.0%16.2%Aetna 13.1%13.0%CareSource 3.4%8.4%Fallon 4.4%4.1%
View the data table
Carrier share, Sep 2025 to Sep 2026: Sep 2025 and Sep 2026
NameSep 2025Sep 2026Change
Point32Health25.8%23.3%−2.4 pts
UnitedHealthcare24.1%21.0%−3.1 pts
BCBS Massachusetts20.0%16.2%−3.8 pts
Aetna/CVS13.1%13.0%−0.1 pts
CareSource3.4%8.4%+5.0 pts
Fallon Community Health Plan4.4%4.1%−0.3 pts

Contract file · Sep 2026. Employer group plans included.

Carrier share of Medicare Advantage members with a carrier label, Massachusetts, September 2026
CarrierShare, Sep 2026Share, Sep 2025ChangeMembers
Point32Health23.3%25.8%−2.4 pts124,551
UnitedHealthcare21.0%24.1%−3.1 pts111,850
BCBS Massachusetts16.2%20.0%−3.8 pts86,746
Aetna/CVS13.0%13.1%−0.1 pts69,302
CareSource8.4%3.4%+5.0 pts44,655
Fallon Community Health Plan4.1%4.4%−0.3 pts21,844
Mass General Brigham Incorporated4.0%1.6%+2.4 pts21,150
Baystate Health2.8%2.6%+0.2 pts14,909
Humana2.1%1.5%+0.5 pts10,960
Molina2.0%2.1%−0.1 pts10,422
Central Mass Health Holding1.5%0.8%+0.7 pts7,758
Eternal Health of Delaware1.4%0.4%+1.0 pts7,533
All other carriers0.4%––2,184

Insurer not assigned in CMS data: 1.4% of all members in Sep 2026, 8.8% in Sep 2025. Shares leave these members out. The unassigned share is above 3%, so treat share changes as rough. 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 Massachusetts

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 Massachusetts by individual Medicare Advantage members, September 2026
CountyMembers12-month changeLeading carrierLeader's share
Middlesex95,384+1.3%Point32Health40.0%
Worcester73,606+2.8%BCBS Massachusetts19.6%
Essex58,887+2.2%UnitedHealthcare27.9%
Bristol47,333+2.9%UnitedHealthcare24.1%
Hampden46,905+0.4%CareSource28.7%
Suffolk46,267−0.4%UnitedHealthcare28.7%
Norfolk43,930+2.7%Point32Health30.4%
Plymouth36,999+2.3%Point32Health23.9%
Barnstable16,937−1.2%BCBS Massachusetts48.7%
Hampshire10,714−1.7%BCBS Massachusetts39.8%

Browse all counties.

Common questions

How many people have Medicare Advantage in Massachusetts?

Massachusetts had 542,576 members in September 2026, by the CMS county file (employer group plans included). Individual plans, which leave out employer group coverage, had 489,349 members in September 2026.

Is Medicare Advantage growing in Massachusetts?

Enrollment is up 0.6% from Sep 2025 to Sep 2026, slower than the national 2.0%. Among individual plans, which leave out employer group coverage, enrollment is up 1.6% in the 12 months to September 2026.

Which carrier has the most Medicare Advantage members in Massachusetts?

Point32Health leads with 23.3% of members who have a carrier label (contract file, September 2026). UnitedHealthcare and Humana together hold 23.0%, down 2.6 points from Sep 2025. Shares leave out members whose contract has no carrier label: 1.4% of members.

Cite and download

Cite this page

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

Download Massachusetts 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