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Medicare Advantage Enrollment Tracker · Indiana

Medicare Advantage Enrollment in Indiana

Indiana had 731,033 Medicare Advantage members in September 2026, by the CMS county file, which includes employer group plans. That is up 2.8% from Sep 2025, faster than the national 2.0%. Indiana ranks 17th by members and holds 2.0% of the national total.

UnitedHealthcare leads with 35.1% of members who have a carrier label (contract file, September 2026). Among individual plans, which leave out employer group coverage, enrollment is up 3.7% 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.

Indiana at a glance

Medicare Advantage members

731,033

Indiana members by month: from 611K in Jan 2023 to 731K in Sep 2026

County file · Sep 2026. Includes employer group plans. Rank: 17.

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

+2.8%

up 2.8 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

618,776

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

35.1% of members with a carrier label. Contract file · Sep 2026.

Indiana members by month

Medicare Advantage members in Indiana

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 IndianaLine chart, January 2023 to September 2026. Indiana: 731K in September 2026. Shaded bands mark months with no data.600K650K700K750K2023202420252026Indiana731K
Medicare Advantage members in IndianaLine chart, January 2023 to September 2026. Indiana: 731K in September 2026. Shaded bands mark months with no data.600K650K700K750K20232025Indiana731K
  • Indiana
  • Shaded: no data that month
View the data table
Medicare Advantage members in Indiana: values by month
MonthIndiana
Sep 2026731K
Aug 2026732K
Jul 2026731K
Jun 2026728K
May 2026726K
Apr 2026726K
Mar 2026725K
Feb 2026723K
Jan 2026716K
Dec 2025712K
Nov 2025713K
Oct 2025712K
Sep 2025711K
Aug 2025711K
Jul 2025709K
Jun 2025708K
May 2025706K
Apr 2025705K
Mar 2025704K
Feb 2025703K
Jan 2025695K
Dec 2024685K
Nov 2024685K
Oct 2024684K
Sep 2024682K
Aug 2024680K
Jul 2024679K
Jun 2024678K
May 2024677K
Apr 2024676K
Mar 2024674K
Feb 2024673K
Jan 2024669K
Dec 2023–
Nov 2023645K
Oct 2023642K
Sep 2023639K
Aug 2023637K
Jul 2023–
Jun 2023633K
May 2023631K
Apr 2023628K
Mar 2023626K
Feb 2023624K
Jan 2023611K

County file · Sep 2026. Employer group plans included.

Indiana 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.
Indiana and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Indiana: 119.6 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.1001051101151202023202420252026Indiana119.6National117.8
Indiana and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Indiana: 119.6 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.10010511011512020232025Indiana119.6National117.8
  • Indiana
  • National (same jurisdictions each month)
  • Shaded: no data that month
View the data table
Indiana and the nation, Jan 2023 = 100: values by month
MonthIndianaNational (same jurisdictions each month)
Sep 2026119.6117.8
Aug 2026119.7117.8
Jul 2026119.6117.5
Jun 2026119.1117.4
May 2026118.8117.2
Apr 2026118.8116.9
Mar 2026118.6116.7
Feb 2026118.3116.3
Jan 2026117.2114.7
Dec 2025116.5115.9
Nov 2025116.6115.9
Oct 2025116.6115.7
Sep 2025116.4115.5
Aug 2025116.3115.3
Jul 2025116115
Jun 2025115.8114.8
May 2025115.5114.4
Apr 2025115.4114.2
Mar 2025115.2113.8
Feb 2025115.1113.4
Jan 2025113.8111.9
Dec 2024112.1112
Nov 2024112.1112
Oct 2024111.9111.7
Sep 2024111.7111.5
Aug 2024111.3111.2
Jul 2024111.1110.9
Jun 2024111110.7
May 2024110.8110.5
Apr 2024110.6110
Mar 2024110.4109.7
Feb 2024110.1109.3
Jan 2024109.5108.7
Dec 2023––
Nov 2023105.5105.9
Oct 2023105105.6
Sep 2023104.6105.2
Aug 2023104.3104.9
Jul 2023––
Jun 2023103.5104.1
May 2023103.2103.8
Apr 2023102.8103.4
Mar 2023102.4103
Feb 2023102.1102.2
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 Indiana

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 35.1% of members who have a carrier label (contract file, September 2026).

Humana gained 4.8 points in 12 months; most of that change came in January 2026.

Elevance/Anthem lost 6.7 points in 12 months; most of that change came in January 2026.

UnitedHealthcare and Humana together hold 65.5%, up 3.7 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. UnitedHealthcare: 36.2% to 35.1%; Humana: 25.6% to 30.4%; Elevance/Anthem: 25.7% to 19.0%; Aetna/CVS: 6.5% to 5.3%; Devoted Health: 0.3% to 2.8%; BCBS Michigan: 2.8% to 2.4%.Sep 2025Sep 2026UnitedHealthcare 36.2%35.1% UnitedHealthcareHumana 25.6%30.4% HumanaElevance/Anthem 25.7%19.0% Elevance/AnthemAetna/CVS 6.5%5.3% Aetna/CVSDevoted Health 0.3%2.8% Devoted HealthBCBS Michigan 2.8%2.4% BCBS Michigan
Carrier share, Sep 2025 to Sep 2026Slope chart comparing Sep 2025 with Sep 2026. UnitedHealthcare: 36.2% to 35.1%; Humana: 25.6% to 30.4%; Elevance/Anthem: 25.7% to 19.0%; Aetna/CVS: 6.5% to 5.3%; Devoted Health: 0.3% to 2.8%; BCBS Michigan: 2.8% to 2.4%.Sep 2025Sep 2026UHC 36.2%35.1%Humana 25.6%30.4%Elevance 25.7%19.0%Aetna 6.5%5.3%Devoted 0.3%2.8%Blue Cross 2.8%2.4%
View the data table
Carrier share, Sep 2025 to Sep 2026: Sep 2025 and Sep 2026
NameSep 2025Sep 2026Change
UnitedHealthcare36.2%35.1%−1.1 pts
Humana25.6%30.4%+4.8 pts
Elevance/Anthem25.7%19.0%−6.7 pts
Aetna/CVS6.5%5.3%−1.2 pts
Devoted Health0.3%2.8%+2.5 pts
BCBS Michigan2.8%2.4%−0.3 pts

Contract file · Sep 2026. Employer group plans included.

Carrier share of Medicare Advantage members with a carrier label, Indiana, September 2026
CarrierShare, Sep 2026Share, Sep 2025ChangeMembers
UnitedHealthcare35.1%36.2%−1.1 pts254,913
Humana30.4%25.6%+4.8 pts220,501
Elevance/Anthem19.0%25.7%−6.7 pts137,927
Aetna/CVS5.3%6.5%−1.2 pts38,188
Devoted Health2.8%0.3%+2.5 pts20,276
BCBS Michigan2.4%2.8%−0.3 pts17,747
SIHO Holding1.5%0.7%+0.8 pts10,843
Centene/Wellcare1.4%0.8%+0.7 pts10,266
Zing Health1.2%0.8%+0.4 pts8,380
Rifkin Managed Care Holding0.6%0.4%+0.2 pts4,423
All other carriers0.3%––2,236

Insurer not assigned in CMS data: 0.4% of all members in Sep 2026, 1.3% 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 Indiana

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 Indiana by individual Medicare Advantage members, September 2026
CountyMembers12-month changeLeading carrierLeader's share
Marion85,239+3.1%Humana32.6%
Allen44,075+3.4%UnitedHealthcare40.8%
Lake34,157+4.8%Elevance/Anthem28.3%
St. Joseph28,031+3.0%UnitedHealthcare47.3%
Hamilton23,628+4.9%UnitedHealthcare39.7%
Elkhart19,358+2.9%UnitedHealthcare37.9%
Vanderburgh16,844+0.6%Humana32.6%
Johnson14,889+5.4%UnitedHealthcare40.0%
Hendricks14,888+5.3%UnitedHealthcare40.6%
Madison14,461+3.8%Humana34.3%

Browse all counties.

Common questions

How many people have Medicare Advantage in Indiana?

Indiana had 731,033 members in September 2026, by the CMS county file (employer group plans included). Individual plans, which leave out employer group coverage, had 618,776 members in September 2026.

Is Medicare Advantage growing in Indiana?

Enrollment is up 2.8% from Sep 2025 to Sep 2026, faster than the national 2.0%. Among individual plans, which leave out employer group coverage, enrollment is up 3.7% in the 12 months to September 2026.

Which carrier has the most Medicare Advantage members in Indiana?

UnitedHealthcare leads with 35.1% of members who have a carrier label (contract file, September 2026). UnitedHealthcare and Humana together hold 65.5%, up 3.7 points from Sep 2025. Shares leave out members whose contract has no carrier label: 0.4% of members.

Cite and download

Cite this page

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

Download Indiana 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