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Jump to a region: Phoenix area · Southern Arizona · Eastern Arizona · Northern Arizona · Northeast Arizona · Colorado River
Plans open to everyone are Medicare Advantage plans, with or without drug coverage, that anyone with Medicare in the county can join. Source: CMS Landscape files, 2026 and 2027.
Phoenix area
The Salt River Valley and the fast-growing communities between Phoenix and Tucson, where most Arizonans live.
| County | Seat and largest community | Plans open to everyone | Change from 2026 | Special needs plans |
|---|---|---|---|---|
| Maricopa County | Phoenix | 52 | same | 40 |
| Pinal County | Florence, San Tan Valley | 47 | +1 | 24 |
Southern Arizona
The Sonoran Desert and sky-island mountains along the border with Mexico.
| County | Seat and largest community | Plans open to everyone | Change from 2026 | Special needs plans |
|---|---|---|---|---|
| Cochise County | Bisbee, Sierra Vista | 15 | +1 | 13 |
| Pima County | Tucson | 52 | +2 | 36 |
| Santa Cruz County | Nogales | 17 | -3 | 11 |
Eastern Arizona
The copper towns, river valleys and mountains east of Phoenix toward New Mexico.
| County | Seat and largest community | Plans open to everyone | Change from 2026 | Special needs plans |
|---|---|---|---|---|
| Gila County | Globe, Payson | 9 | -2 | 13 |
| Graham County | Safford | 19 | -2 | 13 |
| Greenlee County | Clifton, Morenci | 8 | -3 | 7 |
Northern Arizona
The Colorado Plateau, the Mogollon Rim and the Grand Canyon country.
| County | Seat and largest community | Plans open to everyone | Change from 2026 | Special needs plans |
|---|---|---|---|---|
| Coconino County | Flagstaff | 13 | -2 | 11 |
| Yavapai County | Prescott, Prescott Valley | 20 | -1 | 11 |
Northeast Arizona
The high plateau of the Navajo Nation, Hopi lands and the White Mountains.
| County | Seat and largest community | Plans open to everyone | Change from 2026 | Special needs plans |
|---|---|---|---|---|
| Apache County | St. Johns, Chinle | 7 | -1 | 5 |
| Navajo County | Holbrook, Show Low | 8 | -3 | 8 |
Colorado River
The Colorado River country along the California and Nevada line.
| County | Seat and largest community | Plans open to everyone | Change from 2026 | Special needs plans |
|---|---|---|---|---|
| La Paz County | Parker | 15 | same | 10 |
| Mohave County | Kingman, Lake Havasu City | 12 | -4 | 5 |
| Yuma County | Yuma | 17 | +1 | 11 |
