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Medicare Advantage Enrollment Tracker · Connecticut

Medicare Advantage Enrollment in Connecticut

Connecticut had 438,844 Medicare Advantage members in July 2026, by the CMS county file, which includes employer group plans. That is down 0.8% from Jul 2025. CMS's county file has no Connecticut rows after July 2026, so the figures here are for July 2026. A missing row does not mean enrollment fell to zero. The contract file still lists Connecticut with 446,529 members in September 2026.

Aetna/CVS leads with 43.2% of members who have a carrier label (contract file, September 2026). UnitedHealthcare led a year earlier. Among individual plans, which leave out employer group coverage, enrollment is up 1.0% in the 12 months to September 2026.

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

Data as ofLast month in the county file

  • 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.

  • No Connecticut rows in the county file after July 2026.
    Why this matters

    CMS's county file has no Connecticut rows after July 2026, so the figures here are for July 2026. A missing row does not mean enrollment fell to zero. The contract file still lists Connecticut with 446,529 members in September 2026.

  • 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.

Connecticut at a glance

Medicare Advantage members

438,844

Connecticut members by month: from 355K in Jan 2023 to 439K in Jul 2026

County file · Jul 2026. Includes employer group plans.

County file · Jul 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

-0.8%

down 0.8 percent vs Jul 2025

County file · Jul 2026.

Individual plan members

337,744

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

Aetna/CVS

43.2% of members with a carrier label. Contract file · Sep 2026.

Connecticut members by month

Medicare Advantage members in Connecticut

Members, by month.

County file · Jul 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 ConnecticutLine chart, January 2023 to September 2026. Connecticut: 439K in July 2026. Shaded bands mark months with no data.350K400K450K2023202420252026AConnecticut439K
Medicare Advantage members in ConnecticutLine chart, January 2023 to September 2026. Connecticut: 439K in July 2026. Shaded bands mark months with no data.350K400K450K20232025AConnecticut439K
  • Connecticut
  • Shaded: no data that month
  1. Note A: July 2026: No Connecticut rows in the county file after July 2026.
View the data table
Medicare Advantage members in Connecticut: values by month
MonthConnecticut
Sep 2026–
Aug 2026–
Jul 2026439K
Jun 2026438K
May 2026437K
Apr 2026437K
Mar 2026437K
Feb 2026435K
Jan 2026427K
Dec 2025442K
Nov 2025443K
Oct 2025443K
Sep 2025443K
Aug 2025443K
Jul 2025442K
Jun 2025441K
May 2025440K
Apr 2025439K
Mar 2025438K
Feb 2025436K
Jan 2025430K
Dec 2024430K
Nov 2024429K
Oct 2024428K
Sep 2024427K
Aug 2024425K
Jul 2024423K
Jun 2024422K
May 2024421K
Apr 2024419K
Mar 2024417K
Feb 2024416K
Jan 2024414K
Dec 2023–
Nov 2023405K
Oct 2023403K
Sep 2023402K
Aug 2023400K
Jul 2023–
Jun 2023397K
May 2023395K
Apr 2023394K
Mar 2023392K
Feb 2023367K
Jan 2023355K

County file · Jul 2026. Employer group plans included.

Connecticut and the nation, Jan 2023 = 100

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

County file · Jul 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.
Connecticut and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Connecticut: 123.8 in July 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.1001101201302023202420252026AConnecticut123.8National117.8
Connecticut and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Connecticut: 123.8 in July 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.10011012013020232025AConnecticut123.8National117.8
  • Connecticut
  • National (same jurisdictions each month)
  • Shaded: no data that month
  1. Note A: July 2026: No Connecticut rows in the county file after July 2026.
View the data table
Connecticut and the nation, Jan 2023 = 100: values by month
MonthConnecticutNational (same jurisdictions each month)
Sep 2026–117.8
Aug 2026–117.8
Jul 2026123.8117.5
Jun 2026123.4117.4
May 2026123.3117.2
Apr 2026123.2116.9
Mar 2026123.2116.7
Feb 2026122.7116.3
Jan 2026120.6114.7
Dec 2025124.8115.9
Nov 2025125115.9
Oct 2025124.9115.7
Sep 2025124.8115.5
Aug 2025125115.3
Jul 2025124.7115
Jun 2025124.4114.8
May 2025124.1114.4
Apr 2025123.9114.2
Mar 2025123.5113.8
Feb 2025122.9113.4
Jan 2025121.3111.9
Dec 2024121.2112
Nov 2024121.1112
Oct 2024120.7111.7
Sep 2024120.4111.5
Aug 2024119.9111.2
Jul 2024119.3110.9
Jun 2024119.1110.7
May 2024118.9110.5
Apr 2024118.1110
Mar 2024117.6109.7
Feb 2024117.3109.3
Jan 2024116.7108.7
Dec 2023––
Nov 2023114.1105.9
Oct 2023113.7105.6
Sep 2023113.3105.2
Aug 2023112.8104.9
Jul 2023––
Jun 2023111.9104.1
May 2023111.5103.8
Apr 2023111103.4
Mar 2023110.6103
Feb 2023103.6102.2
Jan 2023100100

County file · Jul 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 Connecticut

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.

Aetna/CVS leads with 43.2% of members who have a carrier label (contract file, September 2026). UnitedHealthcare led a year earlier.

Aetna/CVS gained 13.3 points in 12 months; most of that change came in January 2026.

UnitedHealthcare lost 14.3 points in 12 months; most of that change came in January 2026.

UnitedHealthcare and Humana together hold 27.1%, down 13.2 points from Sep 2025.

The market is about as concentrated as 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. Aetna/CVS: 29.8% to 43.2%; UnitedHealthcare: 39.4% to 25.2%; Elevance/Anthem: 11.5% to 10.7%; Molina: 10.7% to 10.7%; Point32Health: 4.7% to 5.1%; Centene/Wellcare: 2.4% to 2.7%.Sep 2025Sep 2026Aetna/CVS 29.8%43.2% Aetna/CVSUnitedHealthcare 39.4%25.2% UnitedHealthcareElevance/Anthem 11.5%10.7% Elevance/AnthemMolina 10.7%10.7% MolinaPoint32Health 4.7%5.1% Point32HealthCentene/Wellcare 2.4%2.7% Centene/Wellcare
Carrier share, Sep 2025 to Sep 2026Slope chart comparing Sep 2025 with Sep 2026. Aetna/CVS: 29.8% to 43.2%; UnitedHealthcare: 39.4% to 25.2%; Elevance/Anthem: 11.5% to 10.7%; Molina: 10.7% to 10.7%; Point32Health: 4.7% to 5.1%; Centene/Wellcare: 2.4% to 2.7%.Sep 2025Sep 2026Aetna 29.8%43.2%UHC 39.4%25.2%Elevance 11.5%10.7%Molina 10.7%10.7%Point32Health 4.7%5.1%Centene 2.4%2.7%
View the data table
Carrier share, Sep 2025 to Sep 2026: Sep 2025 and Sep 2026
NameSep 2025Sep 2026Change
Aetna/CVS29.8%43.2%+13.3 pts
UnitedHealthcare39.4%25.2%−14.3 pts
Elevance/Anthem11.5%10.7%−0.8 pts
Molina10.7%10.7%0.0 pts
Point32Health4.7%5.1%+0.5 pts
Centene/Wellcare2.4%2.7%+0.4 pts

Contract file · Sep 2026. Employer group plans included.

Carrier share of Medicare Advantage members with a carrier label, Connecticut, September 2026
CarrierShare, Sep 2026Share, Sep 2025ChangeMembers
Aetna/CVS43.2%29.8%+13.3 pts192,494
UnitedHealthcare25.2%39.4%−14.3 pts112,301
Elevance/Anthem10.7%11.5%−0.8 pts47,709
Molina10.7%10.7%0.0 pts47,702
Point32Health5.1%4.7%+0.5 pts22,964
Centene/Wellcare2.7%2.4%+0.4 pts12,106
Humana2.0%0.9%+1.1 pts8,782
HCSC/BCBS0.4%0.6%−0.2 pts1,700
Highmark/BCBS0.0%0.0%0.0 pts169
All other carriers0.0%––92
BCBS Michigan0.0%0.0%0.0 pts60

Insurer not assigned in CMS data: 0.1% 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 Connecticut

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 Connecticut by individual Medicare Advantage members, September 2026
CountyMembers12-month changeLeading carrierLeader's share
Hartford96,428+0.9%UnitedHealthcare30.3%
New Haven86,040+2.1%Aetna/CVS35.4%
Fairfield62,125−2.2%UnitedHealthcare38.0%
New London25,773+1.2%Aetna/CVS33.3%
Litchfield21,369+4.1%Aetna/CVS42.2%
Middlesex19,019+1.3%Aetna/CVS30.0%
Tolland14,612+3.5%Aetna/CVS31.6%
Windham12,378+2.0%Aetna/CVS34.5%

Browse all counties.

Common questions

How many people have Medicare Advantage in Connecticut?

Connecticut had 438,844 members in July 2026, by the CMS county file (employer group plans included). Individual plans, which leave out employer group coverage, had 337,744 members in September 2026.

Is Medicare Advantage growing in Connecticut?

Enrollment is down 0.8% from Jul 2025 to Jul 2026. Among individual plans, which leave out employer group coverage, enrollment is up 1.0% in the 12 months to September 2026.

Which carrier has the most Medicare Advantage members in Connecticut?

Aetna/CVS leads with 43.2% of members who have a carrier label (contract file, September 2026). UnitedHealthcare led a year earlier. UnitedHealthcare and Humana together hold 27.1%, down 13.2 points from Sep 2025. Shares leave out members whose contract has no carrier label: 0.1% of members.

Why does the Connecticut data stop in July 2026?

CMS's county file has no Connecticut rows after July 2026, so the figures here are for July 2026. A missing row does not mean enrollment fell to zero. The contract file still lists Connecticut with 446,529 members in September 2026.

Cite and download

Cite this page

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

Download Connecticut 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