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Medicare Advantage Enrollment Tracker · Mississippi

Medicare Advantage Enrollment in Mississippi

Mississippi had 298,465 Medicare Advantage members in September 2026, by the CMS county file, which includes employer group plans. That is up 3.3% from Sep 2025, faster than the national 2.0%. Mississippi ranks 32nd by members and holds 0.8% of the national total.

Humana leads with 43.1% of members who have a carrier label (contract file, September 2026). Among individual plans, which leave out employer group coverage, enrollment is up 3.4% 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.

Mississippi at a glance

Medicare Advantage members

298,465

Mississippi members by month: from 235K in Jan 2023 to 298K in Sep 2026

County file · Sep 2026. Includes employer group plans. Rank: 32.

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

+3.3%

up 3.3 percent vs Sep 2025

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

Share of national total

0.8%

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

Individual plan members

281,452

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

43.1% of members with a carrier label. Contract file · Sep 2026.

Mississippi members by month

Medicare Advantage members in Mississippi

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 MississippiLine chart, January 2023 to September 2026. Mississippi: 298K in September 2026. Shaded bands mark months with no data.220K240K260K280K300K2023202420252026Mississippi298K
Medicare Advantage members in MississippiLine chart, January 2023 to September 2026. Mississippi: 298K in September 2026. Shaded bands mark months with no data.220K240K260K280K300K20232025Mississippi298K
  • Mississippi
  • Shaded: no data that month
View the data table
Medicare Advantage members in Mississippi: values by month
MonthMississippi
Sep 2026298K
Aug 2026299K
Jul 2026298K
Jun 2026298K
May 2026297K
Apr 2026297K
Mar 2026296K
Feb 2026295K
Jan 2026292K
Dec 2025290K
Nov 2025290K
Oct 2025289K
Sep 2025289K
Aug 2025289K
Jul 2025288K
Jun 2025287K
May 2025286K
Apr 2025285K
Mar 2025285K
Feb 2025284K
Jan 2025279K
Dec 2024278K
Nov 2024278K
Oct 2024278K
Sep 2024277K
Aug 2024276K
Jul 2024274K
Jun 2024273K
May 2024274K
Apr 2024271K
Mar 2024270K
Feb 2024268K
Jan 2024266K
Dec 2023–
Nov 2023255K
Oct 2023254K
Sep 2023252K
Aug 2023250K
Jul 2023–
Jun 2023247K
May 2023246K
Apr 2023243K
Mar 2023242K
Feb 2023240K
Jan 2023235K

County file · Sep 2026. Employer group plans included.

Mississippi 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.
Mississippi and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Mississippi: 127.3 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.1001101201302023202420252026Mississippi127.3National117.8
Mississippi and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Mississippi: 127.3 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.10011012013020232025Mississippi127.3National117.8
  • Mississippi
  • National (same jurisdictions each month)
  • Shaded: no data that month
View the data table
Mississippi and the nation, Jan 2023 = 100: values by month
MonthMississippiNational (same jurisdictions each month)
Sep 2026127.3117.8
Aug 2026127.3117.8
Jul 2026127117.5
Jun 2026126.9117.4
May 2026126.7117.2
Apr 2026126.5116.9
Mar 2026126.4116.7
Feb 2026125.8116.3
Jan 2026124.6114.7
Dec 2025123.6115.9
Nov 2025123.6115.9
Oct 2025123.4115.7
Sep 2025123.2115.5
Aug 2025123.1115.3
Jul 2025122.8115
Jun 2025122.6114.8
May 2025122114.4
Apr 2025121.7114.2
Mar 2025121.6113.8
Feb 2025121.1113.4
Jan 2025119.1111.9
Dec 2024118.7112
Nov 2024118.7112
Oct 2024118.4111.7
Sep 2024117.9111.5
Aug 2024117.5111.2
Jul 2024117110.9
Jun 2024116.6110.7
May 2024116.8110.5
Apr 2024115.4110
Mar 2024114.9109.7
Feb 2024114.3109.3
Jan 2024113.5108.7
Dec 2023––
Nov 2023108.8105.9
Oct 2023108.2105.6
Sep 2023107.5105.2
Aug 2023106.8104.9
Jul 2023––
Jun 2023105.4104.1
May 2023104.7103.8
Apr 2023103.6103.4
Mar 2023103103
Feb 2023102.2102.2
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 Mississippi

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 43.1% of members who have a carrier label (contract file, September 2026).

UnitedHealthcare lost 2.1 points in 12 months; most of that change came in January 2026.

Devoted Health gained 2.4 points in 12 months; most of that change came in January 2026.

UnitedHealthcare and Humana together hold 68.9%, about the same as in 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. Humana: 41.6% to 43.1%; UnitedHealthcare: 27.8% to 25.8%; Aetna/CVS: 14.2% to 12.7%; Centene/Wellcare: 7.9% to 7.9%; HCSC/BCBS: 5.2% to 4.9%; Devoted Health: 0.7% to 3.1%.Sep 2025Sep 2026Humana 41.6%43.1% HumanaUnitedHealthcare 27.8%25.8% UnitedHealthcareAetna/CVS 14.2%12.7% Aetna/CVSCentene/Wellcare 7.9%7.9% Centene/WellcareHCSC/BCBS 5.2%4.9% HCSC/BCBSDevoted Health 0.7%3.1% Devoted Health
Carrier share, Sep 2025 to Sep 2026Slope chart comparing Sep 2025 with Sep 2026. Humana: 41.6% to 43.1%; UnitedHealthcare: 27.8% to 25.8%; Aetna/CVS: 14.2% to 12.7%; Centene/Wellcare: 7.9% to 7.9%; HCSC/BCBS: 5.2% to 4.9%; Devoted Health: 0.7% to 3.1%.Sep 2025Sep 2026Humana 41.6%43.1%UHC 27.8%25.8%Aetna 14.2%12.7%Centene 7.9%7.9%Blue Cross 5.2%4.9%Devoted 0.7%3.1%
View the data table
Carrier share, Sep 2025 to Sep 2026: Sep 2025 and Sep 2026
NameSep 2025Sep 2026Change
Humana41.6%43.1%+1.6 pts
UnitedHealthcare27.8%25.8%−2.1 pts
Aetna/CVS14.2%12.7%−1.6 pts
Centene/Wellcare7.9%7.9%0.0 pts
HCSC/BCBS5.2%4.9%−0.3 pts
Devoted Health0.7%3.1%+2.4 pts

Contract file · Sep 2026. Employer group plans included.

Carrier share of Medicare Advantage members with a carrier label, Mississippi, September 2026
CarrierShare, Sep 2026Share, Sep 2025ChangeMembers
Humana43.1%41.6%+1.6 pts127,853
UnitedHealthcare25.8%27.8%−2.1 pts76,313
Aetna/CVS12.7%14.2%−1.6 pts37,596
Centene/Wellcare7.9%7.9%0.0 pts23,533
HCSC/BCBS4.9%5.2%−0.3 pts14,419
Devoted Health3.1%0.7%+2.4 pts9,294
BCBS Alabama1.5%1.8%−0.2 pts4,570
Elevance/Anthem0.4%0.4%0.0 pts1,229
Mitchell Family Office0.2%0.2%0.0 pts716
All other carriers0.2%––454
Zing Health0.1%0.1%0.0 pts336

Insurer not assigned in CMS data: 0.0% of all members in Sep 2026, 1.8% 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 Mississippi

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 Mississippi by individual Medicare Advantage members, September 2026
CountyMembers12-month changeLeading carrierLeader's share
Hinds24,442+3.5%Humana40.6%
Harrison22,063+5.2%Humana61.0%
Jackson15,680+3.1%Humana51.2%
DeSoto11,685+6.5%Humana53.4%
Rankin10,271+3.9%Humana42.9%
Forrest7,562+3.5%Humana51.0%
Pearl River7,392+5.7%Humana74.5%
Madison7,174+3.1%Humana42.6%
Jones6,753+1.7%Humana50.7%
Lee6,600+3.4%Aetna/CVS68.7%

Browse all counties.

Common questions

How many people have Medicare Advantage in Mississippi?

Mississippi had 298,465 members in September 2026, by the CMS county file (employer group plans included). Individual plans, which leave out employer group coverage, had 281,452 members in September 2026.

Is Medicare Advantage growing in Mississippi?

Enrollment is up 3.3% from Sep 2025 to Sep 2026, faster than the national 2.0%. Among individual plans, which leave out employer group coverage, enrollment is up 3.4% in the 12 months to September 2026.

Which carrier has the most Medicare Advantage members in Mississippi?

Humana leads with 43.1% of members who have a carrier label (contract file, September 2026). UnitedHealthcare and Humana together hold 68.9%, about the same as in Sep 2025. Shares leave out members whose contract has no carrier label: 0.0% of members.

Cite and download

Cite this page

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

Download Mississippi 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