CMS's own filing for Arizona
Medicare Advantage Arizona: Medicare Advantage plans in Arizona, by the numbers
What CMS published about Medicare enrollment in Arizona: 5 of 5 measures filed for this state, each one a field of the state's own row with the date the file was read.
- figures published by CMS
- 5
- counts CMS withheld
- 0
- the day this file was read
- 2026-09-11
Where Arizona sits among the states
51.0% of everyone with Medicare in Arizona is in a Medicare Advantage or other health plan rather than Original Medicare. That puts Arizona 26th of 51, between California above it and Indiana below. Across the country the same figure runs from 62.8% in Michigan down to 3.0% in Alaska, so what counts as the ordinary choice depends on where a person lives, and this is what it is where they do.
Every measure CMS filed for Arizona
| Measure | What CMS published | Source |
|---|---|---|
| People with Medicare | In 2025, 1,535,475 people were enrolled in Medicare in Arizona. | CMS Medicare Monthly Enrollment, 2025 read September 2026 |
| In Medicare Advantage and other health plans | In 2025, 783,222 of them were in Medicare Advantage or another health plan rather than Original Medicare in Arizona (51.0% of everyone with Medicare in Arizona). | CMS Medicare Monthly Enrollment, 2025 read September 2026 |
| In Original Medicare | In 2025, 752,253 stayed in Original Medicare in Arizona (49.0% of everyone with Medicare in Arizona). | CMS Medicare Monthly Enrollment, 2025 read September 2026 |
| In a stand-alone Part D drug plan | In 2025, 489,018 bought drug coverage as a stand-alone Part D plan in Arizona (31.8% of everyone with Medicare in Arizona). | CMS Medicare Monthly Enrollment, 2025 read September 2026 |
| Also covered by Medicaid | In 2025, 251,525 were covered by Medicaid as well as Medicare in Arizona (16.4% of everyone with Medicare in Arizona). | CMS Medicare Monthly Enrollment, 2025 read September 2026 |
A withheld figure means CMS did not publish the count, never that the count is zero.
Cite or embed this figure
Arizona: 5 Medicare enrollment figures published by CMS and 0 counts withheld (Medicare Plan Comparison State Enrollment Index).
Cite as: "Medicare Plan Comparison State Enrollment Index: Arizona", updated 2026-09-11, https://medicareplancomparison.com/states/arizona/.
Download the Arizona figures (CSV), free to reuse with citation.