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Medicare Advantage Enrollment Tracker

Medicare Advantage Enrollment Tracker

Medicare Advantage enrolled 36.18 million people in September 2026, by the CMS contract file, which includes employer group plans. On the same 53 jurisdictions each month, enrollment grew 2.0% in the year to September. Growth has slowed each year: 6.0% in 2024, 3.6% in 2025 and 2.0% in 2026. Net gains from November to February fell each year: 1,031,963 in 2024, 430,158 in 2025 and 133,240 in 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.

  • Alaska and Connecticut drop out of the county file after July 2026.
    Why this matters

    Alaska and Connecticut have no rows in the state file this tracker reads after July 2026. The contract file still lists them (September 2026: Alaska 2,273; Connecticut 446,529). This is a hole in one CMS file, not a fall in enrollment. The published national total falls 375,623 in August 2026; that drop is a gap in the source file, not a loss of members. The national line on these pages sums the 53 jurisdictions that report in every month, and those states show "no data after July 2026". Year over year, the panel reads +2.0% and the all-state contract file +2.0%.

  • 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.

Headline numbers

Medicare Advantage members

36.18M

Contract file · Sep 2026. Includes employer group plans.

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.

Growth in 12 months

+2.0%

up 2.0 percent vs Sep 2025National members, same jurisdictions: from 30.4M in Jan 2023 to 35.8M in Sep 2026

Same 53 jurisdictions each month. County file · Sep 2026.

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.

Net adds, November to February

+133,240

November 2025 to February 2026. Same jurisdictions. County file.

Largest state by members

California

3,750,935 members, 10.5% of the national total. County file · Sep 2026.

National enrollment by month

The solid line sums the same jurisdictions in every month. The dashed line is the total as the CMS county file publishes it.

Medicare Advantage members, by month

Members. Lines break at months with no published data.

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, by monthLine chart, January 2023 to September 2026. Same 53 jurisdictions each month: 35.8M in September 2026. As published in the CMS county file: 35.8M in September 2026. Shaded bands mark months with no data.30M32M34M36M38M2023202420252026ABSame jurisdictions35.8MAs published35.8M
Medicare Advantage members, by monthLine chart, January 2023 to September 2026. Same 53 jurisdictions each month: 35.8M in September 2026. As published in the CMS county file: 35.8M in September 2026. Shaded bands mark months with no data.30M32M34M36M38M20232025ABSame jurisdictions35.8MAs published35.8M
  • Same 53 jurisdictions each month
  • As published in the CMS county file
  • Shaded: no data that month
  1. Note A: July 2023: No data published for this month.
  2. Note B: August 2026: Alaska and Connecticut have no rows in the file after July 2026. A hole in the file, not a fall in enrollment.
View the data table
Medicare Advantage members, by month: values by month
MonthSame 53 jurisdictions each monthAs published in the CMS county file
Sep 202635.8M35.8M
Aug 202635.8M35.8M
Jul 202635.8M36.2M
Jun 202635.7M36.1M
May 202635.6M36.1M
Apr 202635.6M36M
Mar 202635.5M35.9M
Feb 202635.4M35.8M
Jan 202634.9M35.3M
Dec 202535.3M35.7M
Nov 202535.2M35.7M
Oct 202535.2M35.6M
Sep 202535.1M35.6M
Aug 202535.1M35.5M
Jul 202535M35.4M
Jun 202534.9M35.4M
May 202534.8M35.3M
Apr 202534.7M35.2M
Mar 202534.6M35.1M
Feb 202534.5M34.9M
Jan 202534M34.5M
Dec 202434.1M34.5M
Nov 202434.1M34.5M
Oct 202434M34.4M
Sep 202433.9M34.3M
Aug 202433.8M34.3M
Jul 202433.7M34.2M
Jun 202433.7M34.1M
May 202433.6M34.1M
Apr 202433.5M33.9M
Mar 202433.4M33.8M
Feb 202433.3M33.7M
Jan 202433.1M33.5M
Dec 2023––
Nov 202332.2M32.6M
Oct 202332.1M32.5M
Sep 202332M32.4M
Aug 202331.9M32.3M
Jul 2023––
Jun 202331.7M32.1M
May 202331.6M32M
Apr 202331.4M31.8M
Mar 202331.3M31.7M
Feb 202331.1M31.5M
Jan 202330.4M30.8M

County file · Sep 2026. Employer group plans included. Missing months: July 2023 and December 2023 are absent from the state and county file; July 2023 is absent from the contract file. Lines break at a gap. Nothing is filled or averaged across it. Year-over-year changes compare the same calendar month, so July 2023 and December 2023 cannot be compared.

Growth is slowing

Each point compares a month with the same month a year earlier, on the same jurisdictions.

12-month change in members

Percent, same month a year earlier.

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 in membersLine chart, January 2023 to September 2026. 12-month change, same jurisdictions: 2.0% in September 2026. Shaded bands mark months with no data.2%4%6%8%10%2023202420252026A12-month change2.0%
12-month change in membersLine chart, January 2023 to September 2026. 12-month change, same jurisdictions: 2.0% in September 2026. Shaded bands mark months with no data.2%4%6%8%10%20232025A12-month change2.0%
  • 12-month change, same jurisdictions
  • Shaded: no data that month
  1. Note A: January 2026: January step: CMS posts January counts late.
View the data table
12-month change in members: values by month
Month12-month change, same jurisdictions
Sep 20262.0%
Aug 20262.1%
Jul 20262.2%
Jun 20262.2%
May 20262.4%
Apr 20262.4%
Mar 20262.5%
Feb 20262.5%
Jan 20262.5%
Dec 20253.4%
Nov 20253.4%
Oct 20253.5%
Sep 20253.6%
Aug 20253.7%
Jul 20253.7%
Jun 20253.7%
May 20253.5%
Apr 20253.7%
Mar 20253.7%
Feb 20253.8%
Jan 20252.9%
Dec 2024–
Nov 20245.8%
Oct 20245.8%
Sep 20246.0%
Aug 20246.0%
Jul 2024–
Jun 20246.3%
May 20246.5%
Apr 20246.5%
Mar 20246.5%
Feb 20246.9%
Jan 20248.7%
Dec 2023–
Nov 2023–
Oct 2023–
Sep 2023–
Aug 2023–
Jul 2023–
Jun 2023–
May 2023–
Apr 2023–
Mar 2023–
Feb 2023–
Jan 2023–

County file · Sep 2026. 2023 has no prior-year month to compare.

Growth in the year to September

Percent, by year.

  1. Sep 20262.0%
  2. Sep 20253.6%
  3. Sep 20246.0%
View the data table
Growth in the year to September: ranked values
#Name12-month change
1Sep 20262.0%
2Sep 20253.6%
3Sep 20246.0%

County file · Sep 2026. Same jurisdictions each month.

The January step

Counts and shares step each January, when plan-year contracts and annual elections take effect. CMS posts January counts late, so compare November with February.

Net members added, November to February

Members, by year. Same jurisdictions each 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.
  1. Nov 2025 to Feb 2026133,240
  2. Nov 2024 to Feb 2025430,158
  3. Nov 2023 to Feb 20241,031,963
View the data table
Net members added, November to February: ranked values
#NameNet adds
1Nov 2025 to Feb 2026133,240
2Nov 2024 to Feb 2025430,158
3Nov 2023 to Feb 20241,031,963

County file · Sep 2026.

Reported members fell 367,699 from December to January 2026. Part of that may be late postings.

Where enrollment changed

Change in individual Medicare Advantage members over the 12 months to September 2026. Individual plans leave out employer group coverage.

12-month change, individual plans

Blue fell, red rose. Vermont: plan ended, no percent shown. Select a tile for the state page.

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.
12-month change, individual plansTile map of US states and territories, one square per state. 51 places shown. Darker tiles mean higher 12-month change. The table lists every value.Alaska: no dataAKMaine: 1.4%ME1.4%Wisconsin: 1.3%WI1.3%Vermont: no dataVTNew Hampshire: -13.8%NH-13.8%Washington: 2.6%WA2.6%Idaho: -6.6%ID-6.6%Montana: 2.4%MT2.4%North Dakota: 2.2%ND2.2%Minnesota: -2.2%MN-2.2%Illinois: 2.7%IL2.7%Michigan: 3.9%MI3.9%New York: 2.6%NY2.6%Massachusetts: 1.6%MA1.6%Oregon: 1.0%OR1.0%Nevada: 3.3%NV3.3%Wyoming: -26.2%WY-26.2%South Dakota: -2.6%SD-2.6%Iowa: 1.4%IA1.4%Indiana: 3.7%IN3.7%Ohio: 2.7%OH2.7%Pennsylvania: 2.2%PA2.2%New Jersey: 4.3%NJ4.3%Connecticut: 1.0%CT1.0%Rhode Island: 1.3%RI1.3%California: 2.7%CA2.7%Utah: 4.8%UT4.8%Colorado: 1.6%CO1.6%Nebraska: 2.2%NE2.2%Missouri: 3.0%MO3.0%Kentucky: 3.2%KY3.2%West Virginia: 4.6%WV4.6%Virginia: 3.7%VA3.7%Maryland: 0.7%MD0.7%Delaware: 3.3%DE3.3%Arizona: 3.3%AZ3.3%New Mexico: 3.3%NM3.3%Kansas: 2.8%KS2.8%Arkansas: 3.1%AR3.1%Tennessee: 2.6%TN2.6%North Carolina: 4.7%NC4.7%South Carolina: 3.5%SC3.5%District of Columbia: 0.7%DC0.7%Oklahoma: 3.9%OK3.9%Louisiana: 2.3%LA2.3%Mississippi: 3.4%MS3.4%Alabama: 3.2%AL3.2%Georgia: 4.0%GA4.0%Hawaii: 1.1%HI1.1%Texas: 3.9%TX3.9%Florida: 3.0%FL3.0%Puerto Rico: 0.0%PR0.0%
12-month change, individual plansTile map of US states and territories, one square per state. 51 places shown. Darker tiles mean higher 12-month change. The table lists every value.Alaska: no dataAKMaine: 1.4%MEWisconsin: 1.3%WIVermont: no dataVTNew Hampshire: -13.8%NHWashington: 2.6%WAIdaho: -6.6%IDMontana: 2.4%MTNorth Dakota: 2.2%NDMinnesota: -2.2%MNIllinois: 2.7%ILMichigan: 3.9%MINew York: 2.6%NYMassachusetts: 1.6%MAOregon: 1.0%ORNevada: 3.3%NVWyoming: -26.2%WYSouth Dakota: -2.6%SDIowa: 1.4%IAIndiana: 3.7%INOhio: 2.7%OHPennsylvania: 2.2%PANew Jersey: 4.3%NJConnecticut: 1.0%CTRhode Island: 1.3%RICalifornia: 2.7%CAUtah: 4.8%UTColorado: 1.6%CONebraska: 2.2%NEMissouri: 3.0%MOKentucky: 3.2%KYWest Virginia: 4.6%WVVirginia: 3.7%VAMaryland: 0.7%MDDelaware: 3.3%DEArizona: 3.3%AZNew Mexico: 3.3%NMKansas: 2.8%KSArkansas: 3.1%ARTennessee: 2.6%TNNorth Carolina: 4.7%NCSouth Carolina: 3.5%SCDistrict of Columbia: 0.7%DCOklahoma: 3.9%OKLouisiana: 2.3%LAMississippi: 3.4%MSAlabama: 3.2%ALGeorgia: 4.0%GAHawaii: 1.1%HITexas: 3.9%TXFlorida: 3.0%FLPuerto Rico: 0.0%PR
View values for every state
12-month change, individual plans: by state
State12-month change
Alabama3.2%
Arkansas3.1%
Arizona3.3%
California2.7%
Colorado1.6%
Connecticut1.0%
District of Columbia0.7%
Delaware3.3%
Florida3.0%
Georgia4.0%
Hawaii1.1%
Iowa1.4%
Idaho-6.6%
Illinois2.7%
Indiana3.7%
Kansas2.8%
Kentucky3.2%
Louisiana2.3%
Massachusetts1.6%
Maryland0.7%
Maine1.4%
Michigan3.9%
Minnesota-2.2%
Missouri3.0%
Mississippi3.4%
Montana2.4%
North Carolina4.7%
North Dakota2.2%
Nebraska2.2%
New Hampshire-13.8%
New Jersey4.3%
New Mexico3.3%
Nevada3.3%
New York2.6%
Ohio2.7%
Oklahoma3.9%
Oregon1.0%
Pennsylvania2.2%
Puerto Rico0.0%
Rhode Island1.3%
South Carolina3.5%
South Dakota-2.6%
Tennessee2.6%
Texas3.9%
Utah4.8%
Virginia3.7%
Vermont–
Washington2.6%
Wisconsin1.3%
West Virginia4.6%
Wyoming-26.2%

Individual MA · Sep 2026.

Biggest states

Members in September 2026, with the 12-month change.

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.
  1. California10.5% of total3.75M
  2. Florida8.6% of total3.08M
  3. Texas7.7% of total2.77M
  4. New York6.1% of total2.19M
  5. Pennsylvania4.6% of total1.66M
  6. Ohio4.2% of total1.5M
  7. Michigan4.1% of total1.48M
  8. North Carolina3.8% of total1.35M
  9. Georgia3.2% of total1.15M
  10. Illinois3.1% of total1.1M
View the data table
Biggest states: ranked values
#NameMembers12-month change
1California (10.5% of total)3.75M+2.2%
2Florida (8.6% of total)3.08M+2.6%
3Texas (7.7% of total)2.77M+3.5%
4New York (6.1% of total)2.19M+2.3%
5Pennsylvania (4.6% of total)1.66M+1.6%
6Ohio (4.2% of total)1.5M+1.9%
7Michigan (4.1% of total)1.48M+2.3%
8North Carolina (3.8% of total)1.35M+3.5%
9Georgia (3.2% of total)1.15M+3.0%
10Illinois (3.1% of total)1.1M+1.9%

County file · Sep 2026. Employer group plans included.

See all states in a sortable table.

More views

Common questions

How many people are in Medicare Advantage?

The CMS contract file counted 36,183,289 Medicare Advantage members in September 2026. That file includes employer and union group plans. The CMS county file, which this tracker uses for state counts and trends, counted 35,849,071 for the same month, because it has no rows for Alaska and Connecticut.

Is Medicare Advantage still growing?

Yes, but more slowly each year. On the same jurisdictions each month, enrollment grew 2.0% in the year to September, a net gain of 706,934 members. Year to September: 6.0% in 2024, 3.6% in 2025 and 2.0% in 2026.

Did enrollment fall in August?

No. Alaska and Connecticut have no rows in the state file this tracker reads after July 2026. The contract file still lists them (September 2026: Alaska 2,273; Connecticut 446,529). This is a hole in one CMS file, not a fall in enrollment. The published national total falls 375,623 in August 2026; that drop is a gap in the source file, not a loss of members. The national line on these pages sums the 53 jurisdictions that report in every month, and those states show "no data after July 2026". Year over year, the panel reads +2.0% and the all-state contract file +2.0%. Alaska and Connecticut held 441,430 members in July 2026, the last month in the county file.

Which states lost Medicare Advantage members?

On the individual-plan basis (employer group plans left out), Wyoming (-26.2%), New Hampshire (-13.8%), Idaho (-6.6%), South Dakota (-2.6%) and Minnesota (-2.2%) lost members in the 12 months to September 2026. Vermont: plan ended in many counties, so no percent is shown.

Why not compare January with December?

Counts and shares step each January, when plan-year contracts and annual elections take effect, and CMS posts January counts late. Reported members fell 367,699 from December to January 2026; part of that may be late postings. This tracker compares November with February, or the same month a year apart.

Cite and download

Cite this page

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

Download national CSVDownload states 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