# UnitedHealth's Medicare Advantage share fell three points in 21 months

Published 2026-11-07 · By Pushbuild · Data: [Medicare Advantage Enrollment API – Plans by County, Monthly](https://pushbuild.com/apis/medicare-advantage-enrollment.html)

**21**UnitedHealth's Medicare Advantage share fell three points in · as of 2026-11-07

**UnitedHealth's share of Medicare Advantage enrollment fell from 28.65% in January 2025 to 25.79% in October 2026, a loss of 473,092 enrollees. Humana rose from 16.7% to 19.81%.** Cigna lost 664,869 enrollees, more than any other parent company. Total enrollment rose from 33.97 million to 35.89 million.

“Provides monthly enrollment at the contract/plan/state/county level for all organization types.”

— [CMS Monthly Enrollment by Contract/Plan/State/County](https://www.cms.gov/data-research/statistics-trends-and-reports/medicare-advantagepart-d-contract-and-enrollment-data/monthly-enrollment-contract/plan/state/county)

| Parent company | Jan 2020 | Jan 2025 | Oct 2026 |
| --- | --- | --- | --- |
| UnitedHealth Group, Inc. | 25.82% | 28.65% | 25.79% |
| Humana Inc. | 18.01% | 16.7% | 19.81% |
| CVS Health Corporation | 10.35% | 11.83% | 11.48% |
| Kaiser Foundation Health Plan, Inc. | 6.93% | 5.7% | 5.77% |
| Elevance Health, Inc. | 0.0% | 6.6% | 5.22% |
| Centene Corporation | 1.21% | 2.97% | 2.47% |
| Health Care Service Corporation | 0.43% | 0.63% | 2.45% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 2.41% | 2.26% | 1.85% |
| Devoted Health, Inc. | 0.06% | 0.63% | 1.48% |
| SCAN Group | 0.0% | 0.86% | 1.29% |

## Caveats

CMS contract/plan/county enrollment, Medicare Advantage only (stand-alone drug plans left out). Counties with 10 or fewer enrollees are suppressed by CMS. Parent names change after mergers (Elevance was Anthem).

## Sources

- [CMS Monthly Enrollment by Contract/Plan/State/County](https://www.cms.gov/data-research/statistics-trends-and-reports/medicare-advantagepart-d-contract-and-enrollment-data/monthly-enrollment-contract/plan/state/county), read through the Pushbuild [Medicare Advantage Enrollment API](https://pushbuild.com/apis/medicare-advantage-enrollment.html) on 2026-11-07

Data as of 2026-11-07. Every figure in this post is in the table above and the CSV below.

Download the data behind this post: [b4-ma-parent-enrollment-share.csv](https://pushbuild.com/apis/analysis/data/b4-ma-parent-enrollment-share.csv)

## Get this data

Every number in this post comes from the [Medicare Advantage Enrollment API – Plans by County, Monthly](https://pushbuild.com/apis/medicare-advantage-enrollment.html). $0.0008 per row returned; every key gets $1 of free usage each month.

```
curl -X POST https://api.pushbuild.com/medicare-advantage-enrollment/run \
  -H "X-API-Key: YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"states": ["FL"], "maxItems": 20}'
```

[API docs and key](https://pushbuild.com/apis/medicare-advantage-enrollment.html)[More analysis from this data](https://pushbuild.com/apis/analysis/api/medicare-advantage-enrollment/)Embed this chart

Free to reuse with the credit link. Paste this HTML into your page, or use the [SVG file](https://pushbuild.com/apis/analysis/medicare-advantage-market-share-2026/chart.svg).

Want a table like this in Google Sheets, refreshed on demand? Free script: [copy a web table into Google Sheets](https://pushbuild.com/free/scripts/website-table-to-sheets/).

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Header photo: [Carol M. Highsmith](https://commons.wikimedia.org/wiki/File:Exterior_view_of_the_William_H._Welch_Medical_Library,_the_library_of_the_Johns_Hopkins_Hospital_in_Baltimore,_Maryland_LCCN2013650459.tif), Public domain, via Wikimedia Commons.

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As of 2026-11-07. Source: https://pushbuild.com/apis/analysis/medicare-advantage-market-share-2026/