Medicare Advantage Enrollment Tracker
UnitedHealthcare Medicare Advantage Enrollment
In September 2026, UnitedHealthcare had 9,312,135 Medicare Advantage members, down 882,212 from September 2025. That is 25.9% of members with a carrier label, first among carriers. Its share fell 3.6 points since September 2025.
Data as ofCMS contract file
- These totals include employer and union group plans.
Why this matters
Carrier shares: all Medicare Advantage contracts, including employer group, from the CMS contract file. Share is of members with a carrier label. This file and the state file give different totals, so these shares do not apply to state or county member counts.
- Some months are missing from the source.
Why this matters
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.
- Some contracts have no carrier name.
Why this matters
Insurer not assigned in CMS data: 0.6% of members in September 2026 (225,918), against 10.7% in January 2023. These are mostly retired contracts with no carrier label. Shares divide by members with a label so old and new months compare. When the unassigned bucket is above 3% in either month, treat share changes as rough.
- Shares jump each January. Compare same months.
Why this matters
Counts and shares step at each January, when plan-year contracts and annual elections take effect. A 12-month change is mostly one January step plus drift. CMS posts January counts late, so compare November with February or March, not January alone.
By Senior Deal Club Standards Desk. Editorial policy. Methodology. Senior Deal Club is not affiliated with Medicare or any government agency. This page is educational. It counts members. It does not rate plans.
Most of the drop came in one month, January 2026 (−2.66 points). Contract numbers and plan years reset each January, so a carrier's share can jump in that month. Compare same months, or November with February or March, and not January alone.
UnitedHealthcare led 23 areas and held 20% or more in 16 more. An area is a state or DC.
Shares are of members whose contract has a carrier label, from the CMS contract file. The file includes employer group plans. Source: CMS, September 2026.
UnitedHealthcare at a glance
Share of labelled members
25.9%
September 2026, rank 1 among carriers
Members
9,312,135
September 2026, contract file
States led
23
Areas where UnitedHealthcare had the most labelled members, September 2026
Where UnitedHealthcare has members
States where UnitedHealthcare has 1,000 or more members, largest first. Share is of that state's labelled members in September 2026. Change is in percentage points since September 2025. States where a carrier is small may be missing: the data keeps each state's ten largest carriers and any carrier above 1%. A contract that serves several states carries one carrier label, so a carrier can show members in a state where it is not a local plan.
Leads: Texas, Washington, Ohio, Missouri, Arizona, Wisconsin, Indiana, Colorado, Tennessee, Oregon, Oklahoma, Arkansas, Utah, Nevada, New Mexico, Idaho, Kansas, Nebraska, Hawaii, Delaware, District of Columbia, Wyoming, U.S. Virgin Islands. Holds 20% or more: Florida, North Carolina, Georgia, Illinois, New Jersey, Louisiana, Virginia, Alabama, South Carolina, Connecticut, Massachusetts, Mississippi, Iowa, Maine, Rhode Island, New Hampshire.
| State | Members | Share | Rank | Change since September 2025 | Note |
|---|---|---|---|---|---|
| Texas | 1,316,366 | 47.8% | 1 | down 3.9 percentage points | Leads |
| Florida | 880,729 | 28.8% | 2 | down 1.3 percentage points | Strong |
| North Carolina | 427,342 | 31.8% | 2 | down 3.4 percentage points | Strong |
| New York | 393,136 | 18.2% | 2 | down 3.7 percentage points | |
| California | 381,652 | 10.4% | 3 | down 3.0 percentage points | |
| Washington | 357,970 | 45.6% | 1 | down 0.3 percentage points | Leads |
| Ohio | 343,576 | 23.1% | 1 | down 1.0 percentage points | Leads |
| Missouri | 335,010 | 44.8% | 1 | down 5.0 percentage points | Leads |
| Arizona | 326,333 | 40.6% | 1 | down 5.7 percentage points | Leads |
| Georgia | 319,770 | 28.0% | 2 | down 5.1 percentage points | Strong |
| Wisconsin | 277,667 | 35.2% | 1 | down 5.2 percentage points | Leads |
| Indiana | 254,913 | 35.1% | 1 | down 1.1 percentage points | Leads |
| Colorado | 250,996 | 44.6% | 1 | down 4.1 percentage points | Leads |
| Tennessee | 231,440 | 28.3% | 1 | down 2.2 percentage points | Leads |
| Illinois | 219,628 | 20.2% | 3 | down 3.3 percentage points | Strong |
| New Jersey | 217,287 | 28.7% | 2 | down 3.9 percentage points | Strong |
| Louisiana | 207,375 | 37.1% | 2 | down 2.7 percentage points | Strong |
| Virginia | 190,229 | 27.7% | 2 | up 0.4 percentage points | Strong |
| Alabama | 162,240 | 23.1% | 2 | down 14.3 percentage points | Strong |
| South Carolina | 158,990 | 26.5% | 2 | down 9.1 percentage points | Strong |
| Oregon | 157,004 | 30.2% | 1 | up 3.4 percentage points | Leads |
| Pennsylvania | 148,260 | 9.1% | 4 | down 0.4 percentage points | |
| Oklahoma | 145,895 | 41.6% | 1 | down 11.8 percentage points | Leads |
| Arkansas | 131,721 | 40.5% | 1 | down 4.8 percentage points | Leads |
| Utah | 127,128 | 47.1% | 1 | down 4.3 percentage points | Leads |
| Connecticut | 112,301 | 25.2% | 2 | down 14.3 percentage points | Strong |
| Massachusetts | 111,850 | 21.0% | 2 | down 3.1 percentage points | Strong |
| Nevada | 99,648 | 30.4% | 1 | down 3.3 percentage points | Leads |
| New Mexico | 81,548 | 33.8% | 1 | up 0.7 percentage points | Leads |
| Idaho | 80,596 | 42.7% | 1 | up 3.9 percentage points | Leads |
| Kansas | 79,189 | 39.4% | 1 | down 4.1 percentage points | Leads |
| Michigan | 79,154 | 5.4% | 6 | down 1.2 percentage points | |
| Minnesota | 77,618 | 11.3% | 3 | down 6.6 percentage points | |
| Mississippi | 76,313 | 25.8% | 2 | down 2.1 percentage points | Strong |
| Kentucky | 75,620 | 13.6% | 3 | down 8.3 percentage points | |
| Iowa | 71,005 | 26.8% | 2 | down 13.9 percentage points | Strong |
| Nebraska | 53,333 | 39.7% | 1 | down 9.5 percentage points | Leads |
| Maine | 52,582 | 22.9% | 2 | up 0.9 percentage points | Strong |
| Hawaii | 50,503 | 29.9% | 1 | down 1.1 percentage points | Leads |
| Rhode Island | 44,396 | 29.8% | 2 | down 8.5 percentage points | Strong |
| Maryland | 36,578 | 12.6% | 4 | down 13.1 percentage points | |
| West Virginia | 36,576 | 15.0% | 3 | down 2.2 percentage points | |
| New Hampshire | 34,194 | 30.8% | 2 | down 9.2 percentage points | Strong |
| Delaware | 34,134 | 41.0% | 1 | up 5.7 percentage points | Leads |
| District of Columbia | 20,822 | 62.0% | 1 | down 2.8 percentage points | Leads |
| Wyoming | 9,133 | 48.3% | 1 | down 42.7 percentage points | Leads |
| South Dakota | 8,039 | 11.2% | 3 | down 5.8 percentage points | |
| Montana | 7,729 | 9.7% | 3 | down 9.1 percentage points | |
| North Dakota | 6,385 | 11.9% | 3 | up 0.1 percentage points | |
| U.S. Virgin Islands | 5,576 | 99.5% | 1 | no change | Leads |
| Vermont | 4,045 | 19.9% | 3 | down 49.1 percentage points |
Gained or lost the lead
Leader by labelled members in each state, September 2025 against September 2026.
UnitedHealthcare took the lead from BCBS Idaho in Idaho (from BCBS Idaho).
UnitedHealthcare lost the lead in Alabama (to Humana), Connecticut (to Aetna/CVS), Georgia (to Humana), Iowa (to Aetna/CVS), Louisiana (to Humana), Maryland (to Kaiser Permanente), New Hampshire (to Humana), New Jersey (to Aetna/CVS), New York (to Aetna/CVS), North Carolina (to Humana), South Carolina (to Humana), Vermont (to Humana), and Virginia (to Humana).
Questions about UnitedHealthcare
How many people are in UnitedHealthcare Medicare Advantage plans?
9,312,135 members in September 2026, from the CMS contract file. The count includes employer group plans and is not limited to plans anyone can buy.
Is UnitedHealthcare gaining or losing Medicare Advantage members?
Its share of labelled members fell 3.6 points between September 2025 and September 2026, from 29.5% to 25.9%. Members fell from 10,194,347 to 9,312,135. Most of the drop came in one month, January 2026 (−2.66 points). The data does not show why.
Where does UnitedHealthcare have the most members?
Texas (1,316,366, 47.8% of that state's labelled members), Florida (880,729, 28.8% of that state's labelled members), and North Carolina (427,342, 31.8% of that state's labelled members) in September 2026.
Does this page show UnitedHealthcare plan prices or benefits?
No. It counts members and shares. For plan details, use the carrier or Medicare.gov. Senior Deal Club is not affiliated with Medicare or any government agency. This page is educational. It counts members. It does not rate plans.
Cite and download
Cite this page
Senior Deal Club Standards Desk. UnitedHealthcare Medicare Advantage Enrollment. Data as of September 2026. Source: CMS Medicare Advantage monthly enrollment, contract file. https://www.seniordealclub.com/medicare-advantage/enrollment/carriers/unitedhealthcare
See all carriers on the carrier overview. Read the methodology and our editorial policy.