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Medicare Advantage Enrollment Tracker · Alabama

Medicare Advantage Enrollment in Alabama

Alabama had 705,998 Medicare Advantage members in September 2026, by the CMS county file, which includes employer group plans. That is up 2.6% from Sep 2025, faster than the national 2.0%. Alabama ranks 18th by members and holds 2.0% of the national total.

Humana leads with 33.1% 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 3.2% 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.

Alabama at a glance

Medicare Advantage members

705,998

Alabama members by month: from 612K in Jan 2023 to 706K in Sep 2026

County file · Sep 2026. Includes employer group plans. Rank: 18.

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

+2.6%

up 2.6 percent vs Sep 2025

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

Share of national total

2.0%

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

Individual plan members

558,538

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

Humana

33.1% of members with a carrier label. Contract file · Sep 2026.

Alabama members by month

Medicare Advantage members in Alabama

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 AlabamaLine chart, January 2023 to September 2026. Alabama: 706K in September 2026. Shaded bands mark months with no data.600K650K700K750K2023202420252026Alabama706K
Medicare Advantage members in AlabamaLine chart, January 2023 to September 2026. Alabama: 706K in September 2026. Shaded bands mark months with no data.600K650K700K750K20232025Alabama706K
  • Alabama
  • Shaded: no data that month
View the data table
Medicare Advantage members in Alabama: values by month
MonthAlabama
Sep 2026706K
Aug 2026706K
Jul 2026705K
Jun 2026703K
May 2026703K
Apr 2026701K
Mar 2026701K
Feb 2026698K
Jan 2026694K
Dec 2025690K
Nov 2025690K
Oct 2025689K
Sep 2025688K
Aug 2025688K
Jul 2025687K
Jun 2025686K
May 2025684K
Apr 2025683K
Mar 2025682K
Feb 2025681K
Jan 2025675K
Dec 2024671K
Nov 2024671K
Oct 2024670K
Sep 2024669K
Aug 2024667K
Jul 2024666K
Jun 2024664K
May 2024663K
Apr 2024661K
Mar 2024659K
Feb 2024657K
Jan 2024656K
Dec 2023–
Nov 2023638K
Oct 2023636K
Sep 2023634K
Aug 2023632K
Jul 2023–
Jun 2023628K
May 2023626K
Apr 2023624K
Mar 2023622K
Feb 2023620K
Jan 2023612K

County file · Sep 2026. Employer group plans included.

Alabama 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.
Alabama and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Alabama: 115.4 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.1001051101151202023202420252026National117.8Alabama115.4
Alabama and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Alabama: 115.4 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.10010511011512020232025National117.8Alabama115.4
  • Alabama
  • National (same jurisdictions each month)
  • Shaded: no data that month
View the data table
Alabama and the nation, Jan 2023 = 100: values by month
MonthAlabamaNational (same jurisdictions each month)
Sep 2026115.4117.8
Aug 2026115.4117.8
Jul 2026115.2117.5
Jun 2026114.9117.4
May 2026114.8117.2
Apr 2026114.6116.9
Mar 2026114.5116.7
Feb 2026114.1116.3
Jan 2026113.3114.7
Dec 2025112.7115.9
Nov 2025112.7115.9
Oct 2025112.6115.7
Sep 2025112.5115.5
Aug 2025112.3115.3
Jul 2025112.3115
Jun 2025112.1114.8
May 2025111.8114.4
Apr 2025111.5114.2
Mar 2025111.5113.8
Feb 2025111.2113.4
Jan 2025110.2111.9
Dec 2024109.6112
Nov 2024109.6112
Oct 2024109.4111.7
Sep 2024109.2111.5
Aug 2024109111.2
Jul 2024108.8110.9
Jun 2024108.5110.7
May 2024108.3110.5
Apr 2024107.9110
Mar 2024107.6109.7
Feb 2024107.4109.3
Jan 2024107.1108.7
Dec 2023––
Nov 2023104.3105.9
Oct 2023104105.6
Sep 2023103.6105.2
Aug 2023103.3104.9
Jul 2023––
Jun 2023102.7104.1
May 2023102.3103.8
Apr 2023102103.4
Mar 2023101.7103
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 Alabama

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.

Humana leads with 33.1% of members who have a carrier label (contract file, September 2026). UnitedHealthcare led a year earlier.

Humana gained 14.8 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 56.2%, about the same as in 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. Humana: 18.3% to 33.1%; UnitedHealthcare: 37.5% to 23.1%; BCBS Alabama: 16.4% to 16.2%; HCSC/BCBS: 7.7% to 7.4%; Triton Health Systems: 7.7% to 7.4%; Aetna/CVS: 7.6% to 6.1%.Sep 2025Sep 2026Humana 18.3%33.1% HumanaUnitedHealthcare 37.5%23.1% UnitedHealthcareBCBS Alabama 16.4%16.2% BCBS AlabamaHCSC/BCBS 7.7%7.4% HCSC/BCBSTriton 7.7%7.4% TritonAetna/CVS 7.6%6.1% Aetna/CVS
Carrier share, Sep 2025 to Sep 2026Slope chart comparing Sep 2025 with Sep 2026. Humana: 18.3% to 33.1%; UnitedHealthcare: 37.5% to 23.1%; BCBS Alabama: 16.4% to 16.2%; HCSC/BCBS: 7.7% to 7.4%; Triton Health Systems: 7.7% to 7.4%; Aetna/CVS: 7.6% to 6.1%.Sep 2025Sep 2026Humana 18.3%33.1%UHC 37.5%23.1%Blue Cross 16.4%16.2%Blue Cross 7.7%7.4%Triton 7.7%7.4%Aetna 7.6%6.1%
View the data table
Carrier share, Sep 2025 to Sep 2026: Sep 2025 and Sep 2026
NameSep 2025Sep 2026Change
Humana18.3%33.1%+14.8 pts
UnitedHealthcare37.5%23.1%−14.3 pts
BCBS Alabama16.4%16.2%−0.2 pts
HCSC/BCBS7.7%7.4%−0.2 pts
Triton Health Systems7.7%7.4%−0.3 pts
Aetna/CVS7.6%6.1%−1.5 pts

Contract file · Sep 2026. Employer group plans included.

Carrier share of Medicare Advantage members with a carrier label, Alabama, September 2026
CarrierShare, Sep 2026Share, Sep 2025ChangeMembers
Humana33.1%18.3%+14.8 pts232,249
UnitedHealthcare23.1%37.5%−14.3 pts162,240
BCBS Alabama16.2%16.4%−0.2 pts114,037
HCSC/BCBS7.4%7.7%−0.2 pts52,200
Triton Health Systems7.4%7.7%−0.3 pts51,594
Aetna/CVS6.1%7.6%−1.5 pts42,869
Devoted Health3.7%1.9%+1.7 pts25,668
Elevance/Anthem1.5%1.5%0.0 pts10,495
BCBS Michigan0.5%0.6%0.0 pts3,793
Associated Care Ventures0.5%0.4%+0.1 pts3,526
Highmark/BCBS0.5%0.5%0.0 pts3,228
All other carriers0.0%––38

Insurer not assigned in CMS data: 0.3% 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 Alabama

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 Alabama by individual Medicare Advantage members, September 2026
CountyMembers12-month changeLeading carrierLeader's share
Jefferson75,255+1.7%BCBS Alabama23.3%
Mobile54,692+2.7%UnitedHealthcare27.5%
Baldwin31,330+4.3%UnitedHealthcare29.3%
Madison29,777+6.6%Humana26.1%
Montgomery22,674+2.1%UnitedHealthcare41.3%
Shelby20,529+4.6%BCBS Alabama41.9%
Tuscaloosa14,679+2.0%Humana32.0%
Houston13,542+3.8%UnitedHealthcare38.0%
Etowah13,026+2.9%BCBS Alabama25.3%
Calhoun12,876+3.2%UnitedHealthcare27.4%

Browse all counties.

Common questions

How many people have Medicare Advantage in Alabama?

Alabama had 705,998 members in September 2026, by the CMS county file (employer group plans included). Individual plans, which leave out employer group coverage, had 558,538 members in September 2026.

Is Medicare Advantage growing in Alabama?

Enrollment is up 2.6% from Sep 2025 to Sep 2026, faster than the national 2.0%. Among individual plans, which leave out employer group coverage, enrollment is up 3.2% in the 12 months to September 2026.

Which carrier has the most Medicare Advantage members in Alabama?

Humana leads with 33.1% of members who have a carrier label (contract file, September 2026). UnitedHealthcare led a year earlier. UnitedHealthcare and Humana together hold 56.2%, about the same as in Sep 2025. Shares leave out members whose contract has no carrier label: 0.3% of members.

Cite and download

Cite this page

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

Download Alabama 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