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Medicare Advantage Enrollment Tracker · Pennsylvania

Medicare Advantage Enrollment in Pennsylvania

Pennsylvania had 1,662,166 Medicare Advantage members in September 2026, by the CMS county file, which includes employer group plans. That is up 1.6% from Sep 2025, close to the national 2.0%. Pennsylvania ranks 5th by members and holds 4.6% of the national total.

Aetna/CVS leads with 27.3% of members who have a carrier label (contract file, September 2026). Among individual plans, which leave out employer group coverage, enrollment is up 2.2% 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.

Pennsylvania at a glance

Medicare Advantage members

1,662,166

Pennsylvania members by month: from 1.45M in Jan 2023 to 1.66M in Sep 2026

County file · Sep 2026. Includes employer group plans. Rank: 5.

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

+1.6%

up 1.6 percent vs Sep 2025

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

Share of national total

4.6%

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

Individual plan members

1,405,384

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

Aetna/CVS

27.3% of members with a carrier label. Contract file · Sep 2026.

Pennsylvania members by month

Medicare Advantage members in Pennsylvania

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 PennsylvaniaLine chart, January 2023 to September 2026. Pennsylvania: 1.66M in September 2026. Shaded bands mark months with no data.1.4M1.5M1.6M1.7M2023202420252026Pennsylvania1.66M
Medicare Advantage members in PennsylvaniaLine chart, January 2023 to September 2026. Pennsylvania: 1.66M in September 2026. Shaded bands mark months with no data.1.4M1.5M1.6M1.7M20232025Pennsylvania1.66M
  • Pennsylvania
  • Shaded: no data that month
View the data table
Medicare Advantage members in Pennsylvania: values by month
MonthPennsylvania
Sep 20261.66M
Aug 20261.66M
Jul 20261.66M
Jun 20261.66M
May 20261.66M
Apr 20261.66M
Mar 20261.65M
Feb 20261.65M
Jan 20261.62M
Dec 20251.64M
Nov 20251.64M
Oct 20251.64M
Sep 20251.64M
Aug 20251.64M
Jul 20251.63M
Jun 20251.63M
May 20251.63M
Apr 20251.62M
Mar 20251.62M
Feb 20251.62M
Jan 20251.6M
Dec 20241.58M
Nov 20241.58M
Oct 20241.58M
Sep 20241.57M
Aug 20241.57M
Jul 20241.57M
Jun 20241.56M
May 20241.56M
Apr 20241.55M
Mar 20241.55M
Feb 20241.55M
Jan 20241.54M
Dec 2023–
Nov 20231.5M
Oct 20231.5M
Sep 20231.49M
Aug 20231.49M
Jul 2023–
Jun 20231.48M
May 20231.48M
Apr 20231.47M
Mar 20231.47M
Feb 20231.46M
Jan 20231.45M

County file · Sep 2026. Employer group plans included.

Pennsylvania 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.
Pennsylvania and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Pennsylvania: 114.9 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.1001051101151202023202420252026National117.8Pennsylvania114.9
Pennsylvania and the nation, Jan 2023 = 100Line chart, January 2023 to September 2026. Pennsylvania: 114.9 in September 2026. National (same jurisdictions each month): 117.8 in September 2026. Shaded bands mark months with no data.10010511011512020232025National117.8Pennsylvania114.9
  • Pennsylvania
  • National (same jurisdictions each month)
  • Shaded: no data that month
View the data table
Pennsylvania and the nation, Jan 2023 = 100: values by month
MonthPennsylvaniaNational (same jurisdictions each month)
Sep 2026114.9117.8
Aug 2026115117.8
Jul 2026114.9117.5
Jun 2026114.8117.4
May 2026114.7117.2
Apr 2026114.5116.9
Mar 2026114.5116.7
Feb 2026114.2116.3
Jan 2026112.1114.7
Dec 2025113.3115.9
Nov 2025113.4115.9
Oct 2025113.4115.7
Sep 2025113.2115.5
Aug 2025113.2115.3
Jul 2025112.9115
Jun 2025112.6114.8
May 2025112.4114.4
Apr 2025112.2114.2
Mar 2025112113.8
Feb 2025111.9113.4
Jan 2025110.5111.9
Dec 2024109.2112
Nov 2024109.2112
Oct 2024109.1111.7
Sep 2024108.8111.5
Aug 2024108.6111.2
Jul 2024108.3110.9
Jun 2024108110.7
May 2024107.8110.5
Apr 2024107.4110
Mar 2024107.2109.7
Feb 2024106.9109.3
Jan 2024106.6108.7
Dec 2023––
Nov 2023103.9105.9
Oct 2023103.6105.6
Sep 2023103.2105.2
Aug 2023102.9104.9
Jul 2023––
Jun 2023102.3104.1
May 2023102103.8
Apr 2023101.7103.4
Mar 2023101.4103
Feb 2023101.2102.2
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 Pennsylvania

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.

Aetna/CVS leads with 27.3% of members who have a carrier label (contract file, September 2026).

UnitedHealthcare and Humana together hold 15.3%, up 0.5 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. Aetna/CVS: 27.6% to 27.3%; Highmark/BCBS: 21.1% to 19.8%; UPMC Health System: 14.3% to 13.9%; UnitedHealthcare: 9.5% to 9.1%; Independence/BCBS: 8.9% to 8.3%; Humana: 5.3% to 6.2%.Sep 2025Sep 2026Aetna/CVS 27.6%27.3% Aetna/CVSHighmark/BCBS 21.1%19.8% Highmark/BCBSUPMC Health System 14.3%13.9% UPMC Health SystemUnitedHealthcare 9.5%9.1% UnitedHealthcareIndependence/BCBS 8.9%8.3% Independence/BCBSHumana 5.3%6.2% Humana
Carrier share, Sep 2025 to Sep 2026Slope chart comparing Sep 2025 with Sep 2026. Aetna/CVS: 27.6% to 27.3%; Highmark/BCBS: 21.1% to 19.8%; UPMC Health System: 14.3% to 13.9%; UnitedHealthcare: 9.5% to 9.1%; Independence/BCBS: 8.9% to 8.3%; Humana: 5.3% to 6.2%.Sep 2025Sep 2026Aetna 27.6%27.3%Blue Cross 21.1%19.8%UPMC 14.3%13.9%UHC 9.5%9.1%Blue Cross 8.9%8.3%Humana 5.3%6.2%
View the data table
Carrier share, Sep 2025 to Sep 2026: Sep 2025 and Sep 2026
NameSep 2025Sep 2026Change
Aetna/CVS27.6%27.3%−0.2 pts
Highmark/BCBS21.1%19.8%−1.2 pts
UPMC Health System14.3%13.9%−0.4 pts
UnitedHealthcare9.5%9.1%−0.4 pts
Independence/BCBS8.9%8.3%−0.7 pts
Humana5.3%6.2%+0.9 pts

Contract file · Sep 2026. Employer group plans included.

Carrier share of Medicare Advantage members with a carrier label, Pennsylvania, September 2026
CarrierShare, Sep 2026Share, Sep 2025ChangeMembers
Aetna/CVS27.3%27.6%−0.2 pts446,144
Highmark/BCBS19.8%21.1%−1.2 pts323,679
UPMC Health System13.9%14.3%−0.4 pts226,184
UnitedHealthcare9.1%9.5%−0.4 pts148,260
Independence/BCBS8.3%8.9%−0.7 pts134,986
Humana6.2%5.3%+0.9 pts101,585
Risant Health5.9%6.0%−0.1 pts96,180
Capital/BCBS3.1%2.2%+0.9 pts50,404
HCSC/BCBS2.2%2.4%−0.1 pts36,399
Thomas Jefferson University1.7%1.0%+0.7 pts28,182
All other carriers1.4%––23,605
Devoted Health1.0%0.4%+0.6 pts16,700

Insurer not assigned in CMS data: 1.6% of all members in Sep 2026, 2.0% 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 Pennsylvania

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 Pennsylvania by individual Medicare Advantage members, September 2026
CountyMembers12-month changeLeading carrierLeader's share
Allegheny169,421+1.1%UPMC Health System36.7%
Philadelphia151,102+1.7%Independence/BCBS26.8%
Westmoreland63,697+1.9%UPMC Health System32.5%
Montgomery58,594+2.2%Independence/BCBS46.1%
Lancaster57,664+1.8%Highmark/BCBS31.8%
Bucks51,648+1.6%Independence/BCBS51.6%
York50,564+2.6%Aetna/CVS40.2%
Delaware40,593+1.8%Independence/BCBS41.5%
Erie39,085+2.1%Aetna/CVS44.1%
Berks38,629+2.8%Highmark/BCBS24.8%

Browse all counties.

Common questions

How many people have Medicare Advantage in Pennsylvania?

Pennsylvania had 1,662,166 members in September 2026, by the CMS county file (employer group plans included). Individual plans, which leave out employer group coverage, had 1,405,384 members in September 2026.

Is Medicare Advantage growing in Pennsylvania?

Enrollment is up 1.6% from Sep 2025 to Sep 2026, close to the national 2.0%. Among individual plans, which leave out employer group coverage, enrollment is up 2.2% in the 12 months to September 2026.

Which carrier has the most Medicare Advantage members in Pennsylvania?

Aetna/CVS leads with 27.3% of members who have a carrier label (contract file, September 2026). UnitedHealthcare and Humana together hold 15.3%, up 0.5 points from Sep 2025. Shares leave out members whose contract has no carrier label: 1.6% of members.

Cite and download

Cite this page

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

Download Pennsylvania 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