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Medicare Advantage Enrollment Tracker · New Mexico

Medicare Advantage Enrollment in New Mexico

New Mexico had 242,587 Medicare Advantage members in September 2026, by the CMS county file, which includes employer group plans. That is up 2.7% from Sep 2025, faster than the national 2.0%. New Mexico ranks 36th by members and holds 0.7% of the national total.

UnitedHealthcare leads with 33.8% of members who have a carrier label (contract file, September 2026). Among individual plans, which leave out employer group coverage, enrollment is up 3.3% 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.

New Mexico at a glance

Medicare Advantage members

242,587

New Mexico members by month: from 211K in Jan 2023 to 243K in Sep 2026

County file · Sep 2026. Includes employer group plans. Rank: 36.

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

+2.7%

up 2.7 percent vs Sep 2025

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

Share of national total

0.7%

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

Individual plan members

205,827

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

33.8% of members with a carrier label. Contract file · Sep 2026.

New Mexico members by month

Medicare Advantage members in New Mexico

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 New MexicoLine chart, January 2023 to September 2026. New Mexico: 243K in September 2026. Shaded bands mark months with no data.210K220K230K240K250K2023202420252026New Mexico243K
Medicare Advantage members in New MexicoLine chart, January 2023 to September 2026. New Mexico: 243K in September 2026. Shaded bands mark months with no data.210K220K230K240K250K20232025New243K
  • New Mexico
  • Shaded: no data that month
View the data table
Medicare Advantage members in New Mexico: values by month
MonthNew Mexico
Sep 2026243K
Aug 2026242K
Jul 2026242K
Jun 2026242K
May 2026242K
Apr 2026241K
Mar 2026241K
Feb 2026241K
Jan 2026238K
Dec 2025237K
Nov 2025237K
Oct 2025236K
Sep 2025236K
Aug 2025236K
Jul 2025235K
Jun 2025234K
May 2025234K
Apr 2025233K
Mar 2025232K
Feb 2025230K
Jan 2025224K
Dec 2024233K
Nov 2024233K
Oct 2024233K
Sep 2024232K
Aug 2024232K
Jul 2024231K
Jun 2024231K
May 2024230K
Apr 2024229K
Mar 2024228K
Feb 2024227K
Jan 2024225K
Dec 2023–
Nov 2023223K
Oct 2023223K
Sep 2023222K
Aug 2023221K
Jul 2023–
Jun 2023220K
May 2023219K
Apr 2023218K
Mar 2023218K
Feb 2023215K
Jan 2023211K

County file · Sep 2026. Employer group plans included.

New Mexico 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.
New Mexico and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. New Mexico: 115 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.1001051101151202023202420252026National117.8New Mexico115
New Mexico and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. New Mexico: 115 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.10010511011512020232025National117.8New115
  • New Mexico
  • National (same jurisdictions each month)
  • Shaded: no data that month
View the data table
New Mexico and the nation, Jan 2023 = 100: values by month
MonthNew MexicoNational (same jurisdictions each month)
Sep 2026115117.8
Aug 2026115117.8
Jul 2026114.8117.5
Jun 2026114.7117.4
May 2026114.6117.2
Apr 2026114.4116.9
Mar 2026114.3116.7
Feb 2026114.1116.3
Jan 2026113114.7
Dec 2025112.2115.9
Nov 2025112.2115.9
Oct 2025112.1115.7
Sep 2025111.9115.5
Aug 2025111.7115.3
Jul 2025111.4115
Jun 2025111.2114.8
May 2025111114.4
Apr 2025110.5114.2
Mar 2025110.1113.8
Feb 2025108.8113.4
Jan 2025106.2111.9
Dec 2024110.4112
Nov 2024110.4112
Oct 2024110.3111.7
Sep 2024110.1111.5
Aug 2024109.9111.2
Jul 2024109.6110.9
Jun 2024109.3110.7
May 2024109110.5
Apr 2024108.6110
Mar 2024108.2109.7
Feb 2024107.4109.3
Jan 2024106.5108.7
Dec 2023––
Nov 2023105.9105.9
Oct 2023105.6105.6
Sep 2023105.2105.2
Aug 2023104.9104.9
Jul 2023––
Jun 2023104.2104.1
May 2023103.9103.8
Apr 2023103.5103.4
Mar 2023103.3103
Feb 2023101.8102.2
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 New Mexico

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 33.8% of members who have a carrier label (contract file, September 2026).

Presbyterian Healthcare Services lost 2.3 points in 12 months; most of that change came in January 2026.

UnitedHealthcare and Humana together hold 56.6%, up 1.1 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: 33.1% to 33.8%; Humana: 22.3% to 22.8%; Presbyterian Healthcare Services: 24.2% to 21.9%; HCSC/BCBS: 18.2% to 17.9%; Devoted Health: – to 0.9%; Aetna/CVS: 0.9% to 0.9%.Sep 2025Sep 2026UnitedHealthcare 33.1%33.8% UnitedHealthcareHumana 22.3%22.8% HumanaPresbyterian 24.2%21.9% PresbyterianHCSC/BCBS 18.2%17.9% HCSC/BCBS0.9% Devoted HealthAetna/CVS 0.9%0.9% Aetna/CVS
Carrier share, Sep 2025 to Sep 2026Slope chart comparing Sep 2025 with Sep 2026. UnitedHealthcare: 33.1% to 33.8%; Humana: 22.3% to 22.8%; Presbyterian Healthcare Services: 24.2% to 21.9%; HCSC/BCBS: 18.2% to 17.9%; Devoted Health: – to 0.9%; Aetna/CVS: 0.9% to 0.9%.Sep 2025Sep 2026UHC 33.1%33.8%Humana 22.3%22.8%Presbyterian 24.2%21.9%Blue Cross 18.2%17.9%0.9%Aetna 0.9%0.9%
View the data table
Carrier share, Sep 2025 to Sep 2026: Sep 2025 and Sep 2026
NameSep 2025Sep 2026Change
UnitedHealthcare33.1%33.8%+0.7 pts
Humana22.3%22.8%+0.4 pts
Presbyterian Healthcare Services24.2%21.9%−2.3 pts
HCSC/BCBS18.2%17.9%−0.3 pts
Devoted Health–0.9%–
Aetna/CVS0.9%0.9%0.0 pts

Contract file · Sep 2026. Employer group plans included.

Carrier share of Medicare Advantage members with a carrier label, New Mexico, September 2026
CarrierShare, Sep 2026Share, Sep 2025ChangeMembers
UnitedHealthcare33.8%33.1%+0.7 pts81,548
Humana22.8%22.3%+0.4 pts54,840
Presbyterian Healthcare Services21.9%24.2%−2.3 pts52,693
HCSC/BCBS17.9%18.2%−0.3 pts43,250
Devoted Health0.9%––2,191
Aetna/CVS0.9%0.9%0.0 pts2,159
Molina0.5%0.3%+0.3 pts1,281
CHRISTUS Health0.5%0.4%+0.1 pts1,191
SCAN0.4%0.1%+0.2 pts848
Elevance/Anthem0.3%0.3%0.0 pts788
BCBS Michigan0.1%0.1%0.0 pts202
All other carriers0.0%––34

Insurer not assigned in CMS data: 0.2% of all members in Sep 2026, 0.3% 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 New Mexico

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 New Mexico by individual Medicare Advantage members, September 2026
CountyMembers12-month changeLeading carrierLeader's share
Bernalillo69,095+1.5%Presbyterian Healthcare Services34.9%
Dona Ana24,556+3.9%UnitedHealthcare70.0%
Sandoval18,067+3.6%Presbyterian Healthcare Services36.3%
Santa Fe14,991+1.6%UnitedHealthcare30.4%
Valencia9,811+2.2%Presbyterian Healthcare Services33.3%
San Juan8,377+8.8%Humana39.0%
Otero5,681+4.3%UnitedHealthcare70.8%
Chaves5,166+4.5%Humana48.4%
Rio Arriba4,355+3.2%UnitedHealthcare30.7%
Taos4,162+3.1%Humana48.8%

Browse all counties.

Common questions

How many people have Medicare Advantage in New Mexico?

New Mexico had 242,587 members in September 2026, by the CMS county file (employer group plans included). Individual plans, which leave out employer group coverage, had 205,827 members in September 2026.

Is Medicare Advantage growing in New Mexico?

Enrollment is up 2.7% from Sep 2025 to Sep 2026, faster than the national 2.0%. Among individual plans, which leave out employer group coverage, enrollment is up 3.3% in the 12 months to September 2026.

Which carrier has the most Medicare Advantage members in New Mexico?

UnitedHealthcare leads with 33.8% of members who have a carrier label (contract file, September 2026). UnitedHealthcare and Humana together hold 56.6%, up 1.1 points from Sep 2025. Shares leave out members whose contract has no carrier label: 0.2% of members.

Cite and download

Cite this page

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

Download New Mexico 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