Medicare Advantage enrollment, month by month
Medicare Advantage and prescription drug plan enrollment by parent organization, as CMS publishes it every month.
Latest: October 2026
36,024,867 people were in Medicare Advantage plans in October 2026, +0.2% on the month; the fifteen largest parent organizations had 83.3%.
36,024,867
Medicare Advantage enrollment
+0.2%
change on the month
166
parent organizations
25,481,671
stand-alone drug plan enrollment
Notable Medicare Advantage organizations
The fifteen parent organizations with the most enrollment in the latest month. Listed alphabetically; not a ranking.
Alignment Healthcare USA, LLC
Enrolled 301,157 people in Medicare Advantage in October 2026, 0.8% of the total, across 8 contracts.
Blue Cross Blue Shield of Michigan Mutual Ins. Co.
Enrolled 673,684 people in Medicare Advantage in October 2026, 1.9% of the total, across 9 contracts.
Centene Corporation
Enrolled 910,693 people in Medicare Advantage in October 2026, 2.5% of the total, across 68 contracts.
Cvs Health Corporation
Enrolled 4,175,687 people in Medicare Advantage in October 2026, 11.6% of the total, across 43 contracts.
Devoted Health, Inc.
Enrolled 541,337 people in Medicare Advantage in October 2026, 1.5% of the total, across 42 contracts.
Elevance Health, Inc.
Enrolled 1,900,794 people in Medicare Advantage in October 2026, 5.3% of the total, across 48 contracts.
Health Care Service Corporation
Enrolled 899,839 people in Medicare Advantage in October 2026, 2.5% of the total, across 28 contracts.
Healthfirst, Inc.
Enrolled 374,633 people in Medicare Advantage in October 2026, 1.0% of the total, across 4 contracts.
Highmark Health
Enrolled 424,853 people in Medicare Advantage in October 2026, 1.2% of the total, across 11 contracts.
Humana Inc.
Enrolled 7,193,570 people in Medicare Advantage in October 2026, 20.0% of the total, across 39 contracts.
Kaiser Foundation Health Plan, Inc.
Enrolled 2,077,542 people in Medicare Advantage in October 2026, 5.8% of the total, across 13 contracts.
Lifetime Healthcare, Inc.
Enrolled 335,053 people in Medicare Advantage in October 2026, 0.9% of the total, across 6 contracts.
Mhh Healthcare, L.P.
Enrolled 380,150 people in Medicare Advantage in October 2026, 1.1% of the total, across 2 contracts.
Scan Group
Enrolled 465,374 people in Medicare Advantage in October 2026, 1.3% of the total, across 10 contracts.
Unitedhealth Group, Inc.
Enrolled 9,354,348 people in Medicare Advantage in October 2026, 26.0% of the total, across 68 contracts.
Earlier issues
September 2026
35,969,452 people were in Medicare Advantage plans in September 2026, +0.1% on the month; the fifteen largest parent organizations had 83.3%.
August 2026
35,941,076 people were in Medicare Advantage plans in August 2026, +0.2% on the month; the fifteen largest parent organizations had 83.4%.
July 2026
35,870,679 people were in Medicare Advantage plans in July 2026, +0.2% on the month; the fifteen largest parent organizations had 83.4%.
June 2026
35,812,595 people were in Medicare Advantage plans in June 2026, +0.2% on the month; the fifteen largest parent organizations had 83.4%.
May 2026
35,752,005 people were in Medicare Advantage plans in May 2026, +0.2% on the month; the fifteen largest parent organizations had 83.4%.
April 2026
35,678,225 people were in Medicare Advantage plans in April 2026, +0.1% on the month; the fifteen largest parent organizations had 83.5%.
March 2026
35,624,833 people were in Medicare Advantage plans in March 2026, +0.4% on the month; the fifteen largest parent organizations had 83.5%.
February 2026
35,497,054 people were in Medicare Advantage plans in February 2026, +1.4% on the month; the fifteen largest parent organizations had 83.5%.
January 2026
34,995,672 people were in Medicare Advantage plans in January 2026, −0.6% on the month; the fifteen largest parent organizations had 83.7%.
December 2025
35,196,352 people were in Medicare Advantage plans in December 2025, +0.1% on the month; the fifteen largest parent organizations had 84.1%.
November 2025
35,170,433 people were in Medicare Advantage plans in November 2025, +0.1% on the month; the fifteen largest parent organizations had 84.2%.
Source: CMS, Monthly Enrollment by Contract. Figures are as filed; none is estimated. These pages describe firms and markets and are not investment advice.