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Medicare Advantage Enrollment Tracker · Tennessee

Medicare Advantage Enrollment in Tennessee

Tennessee had 823,133 Medicare Advantage members in September 2026, by the CMS county file, which includes employer group plans. That is up 2.3% from Sep 2025, close to the national 2.0%. Tennessee ranks 11th by members and holds 2.3% of the national total.

UnitedHealthcare leads with 28.3% of members who have a carrier label (contract file, September 2026). Among individual plans, which leave out employer group coverage, enrollment is up 2.6% 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.

Tennessee at a glance

Medicare Advantage members

823,133

Tennessee members by month: from 706K in Jan 2023 to 823K in Sep 2026

County file · Sep 2026. Includes employer group plans. Rank: 11.

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

+2.3%

up 2.3 percent vs Sep 2025

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

Share of national total

2.3%

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

Individual plan members

749,159

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

UnitedHealthcare

28.3% of members with a carrier label. Contract file · Sep 2026.

Tennessee members by month

Medicare Advantage members in Tennessee

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 TennesseeLine chart, January 2023 to September 2026. Tennessee: 823K in September 2026. Shaded bands mark months with no data.700K750K800K850K2023202420252026Tennessee823K
Medicare Advantage members in TennesseeLine chart, January 2023 to September 2026. Tennessee: 823K in September 2026. Shaded bands mark months with no data.700K750K800K850K20232025Tennessee823K
  • Tennessee
  • Shaded: no data that month
View the data table
Medicare Advantage members in Tennessee: values by month
MonthTennessee
Sep 2026823K
Aug 2026823K
Jul 2026822K
Jun 2026821K
May 2026819K
Apr 2026818K
Mar 2026818K
Feb 2026816K
Jan 2026810K
Dec 2025805K
Nov 2025806K
Oct 2025805K
Sep 2025805K
Aug 2025804K
Jul 2025802K
Jun 2025801K
May 2025799K
Apr 2025801K
Mar 2025800K
Feb 2025798K
Jan 2025791K
Dec 2024783K
Nov 2024783K
Oct 2024784K
Sep 2024783K
Aug 2024781K
Jul 2024779K
Jun 2024778K
May 2024777K
Apr 2024774K
Mar 2024773K
Feb 2024771K
Jan 2024769K
Dec 2023–
Nov 2023748K
Oct 2023746K
Sep 2023744K
Aug 2023742K
Jul 2023–
Jun 2023737K
May 2023735K
Apr 2023733K
Mar 2023731K
Feb 2023725K
Jan 2023706K

County file · Sep 2026. Employer group plans included.

Tennessee 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.
Tennessee and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Tennessee: 116.5 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.1001051101151202023202420252026National117.8Tennessee116.5
Tennessee and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Tennessee: 116.5 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.10010511011512020232025National117.8Tennessee116.5
  • Tennessee
  • National (same jurisdictions each month)
  • Shaded: no data that month
View the data table
Tennessee and the nation, Jan 2023 = 100: values by month
MonthTennesseeNational (same jurisdictions each month)
Sep 2026116.5117.8
Aug 2026116.5117.8
Jul 2026116.4117.5
Jun 2026116.2117.4
May 2026116117.2
Apr 2026115.9116.9
Mar 2026115.8116.7
Feb 2026115.6116.3
Jan 2026114.7114.7
Dec 2025114115.9
Nov 2025114.1115.9
Oct 2025114115.7
Sep 2025113.9115.5
Aug 2025113.8115.3
Jul 2025113.5115
Jun 2025113.4114.8
May 2025113.2114.4
Apr 2025113.3114.2
Mar 2025113.2113.8
Feb 2025113113.4
Jan 2025111.9111.9
Dec 2024110.9112
Nov 2024110.9112
Oct 2024111111.7
Sep 2024110.8111.5
Aug 2024110.6111.2
Jul 2024110.3110.9
Jun 2024110.1110.7
May 2024110110.5
Apr 2024109.6110
Mar 2024109.4109.7
Feb 2024109.1109.3
Jan 2024108.9108.7
Dec 2023––
Nov 2023105.9105.9
Oct 2023105.6105.6
Sep 2023105.3105.2
Aug 2023105104.9
Jul 2023––
Jun 2023104.3104.1
May 2023104.1103.8
Apr 2023103.8103.4
Mar 2023103.5103
Feb 2023102.6102.2
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 Tennessee

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.

UnitedHealthcare leads with 28.3% of members who have a carrier label (contract file, September 2026).

UnitedHealthcare lost 2.2 points in 12 months; most of that change came in January 2026.

UnitedHealthcare and Humana together hold 53.7%, down 0.6 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. UnitedHealthcare: 30.4% to 28.3%; BCBS Tennessee: 25.0% to 26.2%; Humana: 23.8% to 25.4%; HCSC/BCBS: 10.8% to 10.5%; Elevance/Anthem: 4.0% to 3.6%; Aetna/CVS: 2.5% to 2.3%.Sep 2025Sep 2026UnitedHealthcare 30.4%28.3% UnitedHealthcareBCBS Tennessee 25.0%26.2% BCBS TennesseeHumana 23.8%25.4% HumanaHCSC/BCBS 10.8%10.5% HCSC/BCBSElevance/Anthem 4.0%3.6% Elevance/AnthemAetna/CVS 2.5%2.3% Aetna/CVS
Carrier share, Sep 2025 to Sep 2026Slope chart comparing Sep 2025 with Sep 2026. UnitedHealthcare: 30.4% to 28.3%; BCBS Tennessee: 25.0% to 26.2%; Humana: 23.8% to 25.4%; HCSC/BCBS: 10.8% to 10.5%; Elevance/Anthem: 4.0% to 3.6%; Aetna/CVS: 2.5% to 2.3%.Sep 2025Sep 2026UHC 30.4%28.3%Blue Cross 25.0%26.2%Humana 23.8%25.4%Blue Cross 10.8%10.5%Elevance 4.0%3.6%Aetna 2.5%2.3%
View the data table
Carrier share, Sep 2025 to Sep 2026: Sep 2025 and Sep 2026
NameSep 2025Sep 2026Change
UnitedHealthcare30.4%28.3%−2.2 pts
BCBS Tennessee25.0%26.2%+1.2 pts
Humana23.8%25.4%+1.6 pts
HCSC/BCBS10.8%10.5%−0.2 pts
Elevance/Anthem4.0%3.6%−0.4 pts
Aetna/CVS2.5%2.3%−0.2 pts

Contract file · Sep 2026. Employer group plans included.

Carrier share of Medicare Advantage members with a carrier label, Tennessee, September 2026
CarrierShare, Sep 2026Share, Sep 2025ChangeMembers
UnitedHealthcare28.3%30.4%−2.2 pts231,440
BCBS Tennessee26.2%25.0%+1.2 pts214,681
Humana25.4%23.8%+1.6 pts208,043
HCSC/BCBS10.5%10.8%−0.2 pts86,228
Elevance/Anthem3.6%4.0%−0.4 pts29,508
Aetna/CVS2.3%2.5%−0.2 pts19,059
Devoted Health1.2%0.8%+0.4 pts10,069
Centene/Wellcare1.2%1.4%−0.2 pts9,971
BCBS Michigan0.6%0.6%0.0 pts4,695
Zing Health0.3%0.2%+0.1 pts2,225
Highmark/BCBS0.2%0.2%0.0 pts1,838
All other carriers0.1%––1,214

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 Tennessee

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 Tennessee by individual Medicare Advantage members, September 2026
CountyMembers12-month changeLeading carrierLeader's share
Shelby76,280+3.4%Humana28.8%
Knox50,932+1.8%Humana55.9%
Davidson49,352+1.6%HCSC/BCBS33.8%
Hamilton43,563+3.1%BCBS Tennessee50.2%
Sullivan29,809+1.4%BCBS Tennessee41.4%
Rutherford24,709+3.6%BCBS Tennessee32.1%
Sumner20,619+1.8%HCSC/BCBS42.4%
Washington20,077+2.9%UnitedHealthcare48.4%
Blount17,532+2.3%Humana50.8%
Williamson14,818+1.3%HCSC/BCBS38.6%

Browse all counties.

Common questions

How many people have Medicare Advantage in Tennessee?

Tennessee had 823,133 members in September 2026, by the CMS county file (employer group plans included). Individual plans, which leave out employer group coverage, had 749,159 members in September 2026.

Is Medicare Advantage growing in Tennessee?

Enrollment is up 2.3% from Sep 2025 to Sep 2026, close to the national 2.0%. Among individual plans, which leave out employer group coverage, enrollment is up 2.6% in the 12 months to September 2026.

Which carrier has the most Medicare Advantage members in Tennessee?

UnitedHealthcare leads with 28.3% of members who have a carrier label (contract file, September 2026). UnitedHealthcare and Humana together hold 53.7%, down 0.6 points from Sep 2025. Shares leave out members whose contract has no carrier label: 0.1% of members.

Cite and download

Cite this page

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

Download Tennessee 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